Answer:
y = 5
Step-by-step explanation:
The equation 5x − 2y = 30 tells us that if we take 5 times x and subtract 2 times y, the answer will be 30. If we know either x or y, we can solve for the other.
We are given that x=8. Use the 8 for x in the equation:
5x − 2y=30
5*(8) − 2y=30
40 − 2y=30
-2y = -10
y = 5
The tree diagram represents an
experiment consisting of two trials.
.5 - A - A - .4 - c
.5 - B - .3 - c
.7 - D
P(A) =
Answer:
P(A) =0.5 obviously since it didn't say like P(AC) or P(AD)
Margaret rows 3 miles in 21 minutes. At that same rate, how many miles would she row in 60 minutes? If necessary, round your answer to the nearest tenth.
Group of answer choices
8.6
7
3.3
13
Answer: 8.6 miles
Step-by-step explanation:
Takes 21 divided by 3 = 1 mile in 7 minute
Then take 60 divided by 7 = 8.57
ground to nearest tenth = 8.6 miles
Andre has a summer job selling magazine subscriptions. He earns $25 per week plus $3 for every subscription he sells. Andre hopes to make at least enough money this week to buy a new pair of soccer cleats.
Write an inequality to describe the number of subscriptions Andre must sell to reach his goal.
The inequality to describe the number of subscriptions Andre must sell to reach his goal is 3s + 25 ≥ C.
What are inequalities and their types?Inequality is a relation that compares two numbers or other mathematical expressions in an unequal way.
The symbol a < b indicates that a is smaller than b.
When a > b is used, it indicates that a is bigger than b.
a is less than or equal to b when a notation like a ≤ b.
a is bigger or equal value of an is indicated by the notation a ≥ b.
Assuming the cost of soccer cleats to be 'C' and the number of subscriptions to be 's'.
∴ The inequality that represents this situation is 3s + 25 ≥ C to real his goal.
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1. calculate the theoretical yield of the solid precipitate. show your work.
The Theoretical yield of solid precipitate is 1.42g/mol
Now, consider solid precipitate as cacl2
let us take the mass of cacl2 and calculate the moles of cacl2.
Mass of CaCl2 =2.0 g
By, default the molar mass of CaCl2 =110.98 g/mol
To calculate the Moles we have a formula:
Moles=Given mass*1 mol/Molar mass of a precipitate.-----(1)
substitute the values in equation (1)
Moles of CaCl2 =2.0 g * 1 mol/110.98g
= 0.018 mol
Take another solid precipitate:
Mass of K2Co3=2.0 g
The molar mass of K2Co3 =138.205 g/mol
Now calculating the moles of K2Co3
substitute the values in equation(1)
Moles of K2Co3 =2.0 g * 1 mol/ 138.205g
=0.0145 moles
According to balanced equation 1mole of CaCl2 reacts with 1 mole of K2CO
Thus, 0.018 moles of CaCl2 will react with 0.018 moles of K2CO3
And,0.0145 moles of K2CO3 will produce 0.0145 moles of CaCO3
Molar mass of CaCO3 =100.0869 g/mol
Theoretical yield of CaCO3 =moles of CaCO3 *molar mass of CaCO3
=0.0145 moles * 100.0869 g/mol
=1.45g/mol
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A. f(x)=17.78(4.86)x
i.The value of the function when x=0 is?
ii. Find the ratio of output values that correspond to increases of 1 in the input value in order to determine the 1-unit growth factor.?
iii. Determine the 1-unit percent change.? %
B. h(x)=94.71(0.57)x
i. The value of the function when x=0 is?
ii. Find the ratio of output values that correspond to increases of 1 in the input value in order to determine the 1-unit growth factor.?
iii. Determine the 1-unit percent change.? %
-57 decrease
In this equation.
The value of the function at x=0 is 17.78(4.86)^0 = 17.78(1) = 17.78.
ii. The ratio of output values corresponding to an increment of 1 in input values is (4.86)^1 = 4.86.
iii. A percent change of 1 unit is (4.86 - 1) × 100% = 286% increase.
For the function h(x) = 94.71(0.57)^x:
Thus, the value of the function at x=0 is 94.71(0.57)^0 = 94.71(1) = 94.71.
ii. The ratio of the output value corresponding to an increment of 1 in the input value is (0.57)^2 = 0.57.
iii. Percentage change of 1 unit is (0.57 - 1) × 100% = -57 reduction
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Write the equation in slope-intercept form of the line that passes through (6, -11) and is parrallel to the graph
On solving the provided question we can say that the equation of the line will be y+11 = 0.
How do you define a slope?The slope of a line is how steeply it slopes from left to right. The slope of a line is determined by dividing its rise (vertical change) by its slope, which is its horizontal change. Regardless of whatever two locations on the line you pick, the slope of the line is always constant (it never changes).
How do you find slope?To find the coordinates of two points on the line, choose two. Find the difference between these two locations' y-coordinates (gradients). Find the difference between these two places' x coordinates (runs). Divide the change in the y coordinate by the difference in the x coordinate (slope/history or slope).
Here,
slope, m= 0 as these are parallel line.
so the equation of the line will be
y-y1 = m(x-x1)
y+11 = 0
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Which is the value for
54
.
3
÷
10
0
?
Answer:
The answer is acually 54.3
Step-by-st
4. Write the equation of a line that is perpendicular to y= 3/7x-1 and goes through the point (3,-3).
Answer:
y+3 = -7/3(x-3)
y = -7/3x + 4
the national health and nutrition examination survey contains data on 2,263 u.s. adults. one of the variables is total cholesterol. total cholesterol levels less than 200 milligrams per deciliter (mg/dl) are considered desirable for adults. a reading between 200 and 239 mg/dl is considered borderline high and a reading of 240 mg/dl and above is considered high. does the data in this sample indicate that these individuals have average total cholesterol levels that are desirable?
Yes, the data in this sample indicate that these individuals have average total cholesterol levels that are desirable.
Average:
In math average refers mean value which is equal to the ratio of the sum of the number of a given set of values to the total number of values present in the set.
Given,
Here we have the data of the national health and nutrition examination survey contains data on 2,263 US. adults. one of the variables is total cholesterol. total cholesterol levels less than 200 milligrams per deciliter (mg/dl) are considered desirable for adults. a reading between 200 and 239 mg/dl is considered borderline high and a reading of 240 mg/dl and above is considered high.
And we need to find that does the data in this sample indicate that these individuals have average total cholesterol levels that are desirable.
While we looking into the given question,
Total number pf participants = 2,263
Desirable level of cholesterol = less than 200 milligram
Border line level of cholesterol = Between 200 and 239 mg
Higher level of cholesterol = 240 mg
So, based on the given details, we know that at least 25% of people must have the desirable.
Therefore, the given level is a desirable one.
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What is the value of x? Show your work
Answer: x=16
Step-by-step explanation:
The two angles in the picture is equal to each other.
So the 6x + 4 = 100 degree
6x = 96
x= 16
Is quadrilateral ABCD a rectangle? Provide justification for your decision using the grid or by explanation.
As per the rules in geometry the given figure is rectangle
what is geometry?
Studying the dimensions, sizes, positions, angles, and shapes of objects is the subject of the mathematical branch known as geometry.
explanation:
1. ABC = 90 ................ other angles can be of any value.
2. AB = CD ............... AC and BD might not be equal.
For rectangle, all angles have to be equal (hence, 90) and opposite sides should be equal. Neither of the two statement helps in determining if the two requirements are satisfied or not.
Hence the given figure is Rectangle
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Use estimation to evaluate 8,627.5 ÷ 35
Answer:
246.5
Step-by-step explanation:
86275÷35
= 246.5
approximately 247
PLEASE HELP THIS IS WORTH 12 points and you will be marked as brainliest !!!!!!!!! REALLY URGENT !!!!!
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Figure JKLM below is dilated with a scale factor of 1/4 . Match the appropriate coordinates for J' K' L' M' (after dilation) .
Basically what is :
(4,8) x 1/4 = ?
(4,-8) x 1/4 =?
(-8,0) x 1/4 = ?
(8,0) x 1/4 =?
Step-by-step explanation:
so, for (4, 8) × 1/4, what is 4×1/4 ? and what is 8×1/4 ?
(1, 2)
similar for (4, -8) it is (1, -2).
similar for (-8, 0) it is (-2, 0).
similar for (8, 0) it is (2, 0).
that's it. that's really all there is to it. you multiply all the coordinates by the scale factor.
Sarah uses three and one half pounds of clay to make 14 small vases. Use a proportion to find how many pounds of clay she will use to make 31 small vases.
12 and one half pounds
8 and three fourths pounds
7 and three fourths pounds
6 and one half pounds
Sarah needs 7 and three-fourths of pounds of clay to make 31 small vases. By using the proportion of pounds of clay to the number of small vases, the required value is calculated.
What are proportions?Proportions are equations in which two ratios are made equal to each other. By using these we can relate a part to a whole. The formula for the proportions is written as
a : b = c : d or a/b = c/d or ad = bc
Here the variables a and d are said to be the extreme terms and the variables b and c are the mean terms.
Mostly used proportions are inverse proportion, direct proportion, compound proportion, etc.
Calculation:Given that,
Sarah uses 3 and 1/2 pounds of clay to make 14 small vases.
And x pounds of clay to make 31 small vases.
So, applying the proportions formula for finding the x value as
[tex]3\frac{1}{2}:x=14:31[/tex]
Then, we can write them as
bc = ad ⇒ 14x = 7/2 × 31
⇒ 14x = 217/2
⇒ x = 217/28
⇒ x = 7.75 = [tex]7\frac{3}{4}[/tex]
Therefore, Sarah needs 7 and three-fourths pounds of clay to make 31 small vases. So, option C is correct.
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Which of the following expressions represent a number greater than 1?
Select each correct answers
The numbers which are greater than 1 are 2 ÷ 1/3 and 3/4 ÷ 2/3 so options (B) and (D) are correct.
What is a fraction?In such a fraction, the value that appears above the horizontal line is referred to as the numerator.
In another word, the fraction is the division of the two numbers but the division is not wholly complete.
As per the given fractions,
2 ÷ 1/3 = 2 x 3/1 = 6 > 1
3/4 ÷ 2/3 = 3/4 x 3/2 = 9/8 > 1
Hence "The numbers which are greater than 1 are 2 ÷ 1/3 and 3/4 ÷ 2/3".
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The complete question below,
Expand (2x-1) (x+5) fully
The full expansion of the expression (2x - 1) (x + 5) is 2x² + 9x - 5
How to fully expand the expression?From the question, we have the following parameters that can be used in our computation:
(2x - 1) (x + 5)
Combine the factors of the expression using the product sign
So, we have
(2x - 1) (x + 5) = (2x - 1)* (x + 5)
Evaluate the products
This gives
(2x - 1) (x + 5) = 2x² - x + 10x - 5
Evaluate the like terms in the expression
(2x - 1) (x + 5) = 2x² + 9x - 5
Hence, the expanded expression is 2x² + 9x - 5
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About how much longer is QT than RS? Use an approximation rounded to the nearest tenths place
Answer:
Step-by-step explanation:
what distribution is used with the global test of the regression model to reject the null hypothesis?
F distribution is used with the global test of the regression model to reject the null hypothesis.
The hypothesis test will be conducted using a novel distribution. After the English statistician Sir Ronald Fisher, it is known as the F distribution. A ratio, the F statistic is (a fraction). One set of degrees of freedom is for the denominator, and the other set is for the numerator.
According to the null hypothesis, all group population means are equal. Because it is assumed that the populations are normal and that they have similar variances, the equal means hypothesis indicates that the populations have the same normal distribution. All groups are samples from populations with the same normal distribution, according to the null hypothesis. According to the alternative theory, at least two of the sample groups are drawn from populations with various normal distributions.
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How do you express .13 as a percentage?
.13 can be expressed in the form of percentage as 13%.
In order to convert numbers in decimal into percentage we only need to multiply the given number with 100 and after multiplying the number with hundred it can be written in percentage form. Like in the question given number is 0.13 and we need to express this in form of percentage. So in order to express this number in percentage we just multiply it with 100 which will be equal to 13% i.e
0.13 x 100 = 13%
By multiplying a decimal value by 100 and adding the percentage (%) sign, you can turn a decimal value into a percentage. A decimal multiplied moves the decimal point two places to the right.
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when should timestamping (every 2 minutes) start in the audio segment of 15-20 minutes? gotranscribe
At [00:16:00] timestamping (every 2 minutes) start in the audio segment of 15-20 minutes
Timestamping is frequently used to highlight a certain section of an audio file and indicate its significance.
In general, timestamps are utilised for the transcription process, in which the audio is used as a reference to convert it to a written form, if there is speech in an audio file other than music. Usually, this occurs in the press and media.
The timestamping software has the following formats: [HH:MM:SS]
HH stands for hours, MM for minutes, and SS for seconds.
For Audio segment of 15-20 minutes , [00:16:00] is timestamping every 2 minutes.
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suppose u is a uniform(0, 1) random variable. consider f-1(u), where f-1(.) is the inverse of the cdf of the random variable x. so, f-1(u) is a transformation of u. assume f-1(.) is strictly increasing. what is the distribution of f-1(u)?
The distribution of the given function is a uniform distribution.
A strictly increasing function is the one which increases continuously in a given interval. If f-1(u) is a strictly increasing function of u, then the distribution of f-1(u) is the same as that of u. This is because a strictly increasing function preserves the rank ordering of its input, so if u-1 and u-2 are two random variables with a uniform distribution on the interval (0,1), then the rank order of f-1(u-1) and f-1(u-2) will be the same as the rank order of u-1 and u-2. Since the uniform distribution is defined by the rank order of its values, this means that the distribution of f-1(u) is also uniform on the interval (0,1).
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Three ruler and two pencils cost £3.10
Two rulers and five pencils cost £3.90
Work out the cost of a ruler and pencil
Answer:
To find the cost of a ruler and the cost of a pencil, we can set up a system of equations using the given information. Let R be the cost of a ruler and P be the cost of a pencil.We know that 3R + 2P = 3.10 and 2R + 5P = 3.90Subtracting the first equation from the second, we get:5P - 3P = 3.90 - 3.10
2P = 0.80Dividing both sides by 2, we get:P = 0.40Substituting this value back into one of the original equations, we get:3R + 2(0.40) = 3.10
3R = 2.70
R = 0.90Therefore, the cost of a ruler is £0.90 and the cost of a pencil is £0.40.
Step-by-step explanation:
John deposits $ 8,000 in a certificate of deposit that pays .8% interest, compounded semi-annually. How much interest does the account earn in the first six months? What is the balance after a year.
The required interest earned in the 6 months is $320 and the balance after a year is $8,652.8.
Given that,
John deposits $ 8,000 in a certificate of deposit that pays .8% interest, compounded semi-annually.
Investment is defined as when an individual is spend money on something that returns him or her higher money than the money they or invest.
Here,
Interest earned in the 6 months,
= 8000 [0.08/2]
= $320
Balance after a year,
Amount = principal [1 + rate/n]ⁿ
= 8000[1 + 0.08/2]²
= $8652.8
Thus, the required interest earned in the 6 months is $320 and the balance after a year is $8,652.8.
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Which of the following is not a test of congruence of triangle * AAS test SAS test asa test SSA test?
Answer:
SSA
Step-by-step explanation:
If you have 2 triangles that have 2 congruent sides, and a congruent non-included angle, there is 2 possible values for the third side, so SSA does not work
I need help in this one! Thank you!
Answer:
Grey dice. White dice
1 1. 52 2. 65 3. 16 4. 2Step-by-step explanation:
Flip them around, this one really got me lol
Explain why 2 less than the absolute Value of -5?
Answer:
because the absolute value of -5 is positive 5
Cylindrical paper dryerse are used in pulp and paper mills. One dryer has diameter 1.5m and length 2.5m.
What is the area of the curved surface of this dryer?
The area of the curved surface of the dryer is 11.775m
What is the cylinder?The three-dimensional form of a cylinder is made up of two parallel circular bases connected by a curving surface. The right cylinder is created when the centers of the circular bases cross each other. The axis, which represents the height of the cylinder, is the line segment that connects the two centers.
What are the examples of cylinders?A cylinder is a three-dimensional solid object with two bases that are identically circular and are connected by a curving surface that is located at a certain height from the center. Real-world examples of cylinders are toilet paper rolls and cold beverage cans.
We know, the formula for curved surface of cylinder is 2pirh
putting the desired value in the equation we get
11.775m
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question 4 you are working with the following selection of a spreadsheet: a b 1 customer address 2 sally stewart 9912 school st. north wales, pa 19454 3 lorenzo price 8621 glendale dr. burlington, ma 01803 4 stella moss 372 w. addison street brandon, fl 33510 5 paul casey 9069 e. brickyard road chattanooga, tn 37421 in order to extract the five-digit postal code from north wales, pa, what is the correct function?
For the given data analysis , The correct function is : RIGHT(B3,5), which is the correct syntax.
Here it is related to data cleaning which is the process of removing or fixing data that are incorrect or formatted incorrectly, corrupted, duplicate, or even incomplete data within a dataset that exists. When we mix multiple data sources, it depicts that there can be opportunities for the data to be mislabeled or duplicated, since we are guiven that the customer names and addresses, so the correct syntax will be =RIGHT(B3,5), where the RIGHT Function that returns set number of characters of a text string from the right side
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HELPPPPPP ASAPPPP!!! PLEASEE RNNNNNN
1. Distribute
2. Subtract 1/2z on both sides
3. Subtract 9 on each side
4. x=-3
5. CHECK
a cone has a radius of 4ft and a height of 2ft. what is the volume in yd3? round intermediate steps to 2 decimal places. round final answer to 2 decimal places.
Therefore, the volume of the given cone is V=33.51 [tex]ft^{3}[/tex]
What is Volume?A three-dimensional space's occupied volume is measured. It is frequently expressed as a numerical value using SI-derived units, other imperial units, or US customary units. Volume and length definitions are connected.
Here,
Cone has a radius of 4ft
A height of 2ft.
Thus,
The formula for volume of cone is used
V=π[tex]r^{2} \frac{h}{3}[/tex]
V=3.14*[tex]4^{2}[/tex]*2/3
V=50.24*2/3
V=100.48/3
V=33.51 [tex]ft^{3}[/tex]
Therefore, the volume of the given cone is V=33.51 [tex]ft^{3}[/tex]
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