Answer:
The answer is 35
Step-by-step explanation:
70 divided by 2 is 35 which would be 35 miles per hour which would be your unit rate.
Gina had $15. Then she bought a T-shirt for $8.75, a baseball cap for $1.99, and a refrigerator magnet for $0.75. How much money did she spend in all?
A.
$10.66
B.
$11.49
C.
$12.82
D.
$14.61
Answer:
$11.49
Step-by-step explanation:
Answer:
$11.49
Step-by-step explanation:
Someone please help me.
Answer:
D
Step-by-step explanation:
-4 x 3/2 = -12/2; which equals -6
so -6x.
-4 x -1/2 = 4/2; which equals 2
This means that:
-6x + 2 = 15; so 'D' is the answer
Answer:
D
Step-by-step explanation:
The distributive property states that a(b+c)=ab+ac. In this problem -4 is a, 3/2x is b, and -1/2 is c. -4(3/2) is 6, and -4(-1/2) is 2. So we have -6x+2=-15.
The student body of 10 students want to elect a president, vice president, secretary, and treasurer.
A) Permutation
B) Combination
C) Circular permutation
Answer:
a
Step-by-step explanation:
Answer:
A
Step-by-step explanation:
Aless and Louis are going to put a rectangular pool in their backyard. The cost of installation is $6,000. If the dimensions of the pool are 30 meters by 20 meters by 2 meters, what is the cost of the installation of their pool per cubic meter?
Answer:
cost of the pool per cubic meters = $5
Step-by-step explanation:
The rectangular pool has a dimension of 30 m by 20 m by 2 m. To know the cost of the pool per cubic meter we have to calculate the volume of the pool . Then divide the total cost of the pool by it volume.
volume of the rectangular pool = length × height × width
volume of the rectangular pool = 30 × 20 × 2
volume of the rectangular pool = 1200 m²
The cost of installation is $6000 . The volume of the pool is 1200 cubic meters.
cost per cubic meters = total cost of installation/volume
cost per cubic meters = 6000/1200
cost of the pool per cubic meters = $5
Order the following expressions by their values from least to greatest.
b-a
a -0.5
a
Answer:
a
a -0.5
b -a
i believe that is the order but i could be wrong
Answer:
hi there !!
the correct answer should be: a - 0.5, a, b - a
Step-by-step explanation:
first let's show -0.5 on the number line.
now let's show b - a on the number line.
the given expressions are ordered by their values below.
81-4x^2
please explain how you got your answer
Answer:
b = 2 x .
(9+2x) (9-2x)
Step-by-step explanation:
Since both terms are perfect squares, factor using the difference of squares formula, a 2 − b 2 = ( a + b ) ( a − b )
Answer:
Step-by-step explanation:
81 - 4[tex]x^{2}[/tex]
notice how this is difference of squares, meaning you can simplify
(9-2x) (9+2x)
if the question is asking to find roots, then you just set this equal to 0, and that means that either 9-2x or 9+2x must be equal to 0.
9-2x = 0 9+2x = 0
9 = 2x 9 = -2x
x = 4.5 x = -4.5
Therefore the two roots of this equation are ±4.5
Please help me!!!!!!!
Write a quadratic function whose zeros are 2 and 13.
Answer:
x^2-15+26
Step-by-step explanation:
(x-13)(x-2)=x^2-2x-13x+26=x^2-15+26
Hope this helps! Please mark brainliest :)
What is 4 divided 2/3
Answer:
the answer for that equation is 6
Answer:
Step-by-step explanation:
4÷2/3=4/1÷2/3=4/1×3/2=12/2=6
I hope it'll help you much
Thank you for asking
x + 2y = 13
-x + y = 5
Answer:
x = 1; y = 6
Step-by-step explanation:
x + 2y = 13
-x + y = 5
Add the equations to eliminate x.
3y = 18
Divide both sides by 3.
y = 6
Now substitute y with 6 in the first equation.
x + 2(6) = 13
x + 12 = 13
Subtract 12 from both sides.
x = 1
Answer: x = 1; y = 6
There is a 25% chance that a canal will flood during any given year. What is the experimental probability that the canal will flood in at least 1 of the next 6 years?
Answer:
Probability = 0.356
Step-by-step explanation:
Probability of flooding = 25/100
= 0.25 lets call it p
So probability of not flooding = 1-0.25= 0.75. Lets call it q
So to find the probability of flooding in 1 out of 6 we use combination.
Probabilty = 6C1p^1q^5
Probabilty= 6 *0.25^1 *0.75^5
Probability = 0.356
Based on the data given in the picture, calculate the area of the car track...
Please, I need help, i will mark the answer with a brainliest mark...
Refer to the diagram below. We need to find the areas of the green and blue regions, then subtract to get the area of the orange track only.
The larger green region is composed of a rectangle of dimensions 200 meters by 4+42+4 = 50 meters, along with two semicircles that combine to make a full circle. This circle has radius 25 meters.
The green rectangle has area 200*50 = 10000 square meters. The green semicircles combine to form an area of pi*r^2 = pi*25^2 = 625pi square meters. In total, the full green area is 10000+625pi square meters. I'm leaving things in terms of pi for now. The approximation will come later.
The blue area is the same story, but smaller dimensions. The blue rectangle has dimensions 200 meters by 42 meters, so its area is 200*42 = 8400 square meters. The blue semicircular pieces combine to a circle with area pi*r^2 = pi*21^2 = 441pi square meters. In total, the blue region has area 8400+441pi square meters.
After we figure out the green and blue areas, we subtract to get the orange region's area, which is the area of the track only.
orange area = (green) - (blue)
track area = (10000+625pi) - (8400+441pi)
track area = 10000+625pi - 8400-441pi
track area = (10000-8400) + (625pi - 441pi)
track area = 184pi + 1600 is the exact area in terms of pi
track area = 2178.05304826052 is the approximate area when you use the pi constant built into your calculator. If you use pi = 3.14 instead, then you'll get 2177.76 as the approximate answer. I think its better to use the more accurate version of pi. Of course, be sure to listen/follow your teachers instructions.
A scale drawing is shown for clubhouse. The measurements are 4“ x 8“ what will the actual clubhouse measurements be if the scale factor is 1 inch equals 2 feet
Answer:
8ft. x 16ft.
Step-by-step explanation:
If each inch is scaled to 2 ft, then you simply multiply the values by two. The new scaled dimensions would be 8 x 16 ft. Hope this helps.
In a probability model, the probabilities of all the outcomes in the sample space add up to _____.
Answer:
They all add up to 1
Step-by-step explanation:
For a given probability model, when we add all possible probabilities, our answer must be equal to 1.
In a probability model, what we are trying to do is to look at all possible outcomes that can arise from using the model. All these outcomes can be seen as a fraction of the total. They each have their own percentage of occurrence.
It is when we are up all these fractions that we can get the maximum which must not be greater than 1. Thus, all probabilities of occurrence in a probability model ranges from 0 to 1, with the addition of all the probabilities equal to 1. 0 being the probability that the intended event has no probability of occurrence at all and 1 meaning it has the maximum possible probability to occur
evaluate the expression -3 times 0.4 to the power of 2 + -1.1 to the power of 3?
Answer:
idk i have the same question
Step-by-step explanation:
Simplify each rational expression. State any restrictions on the variable.
x-3/x+4 ÷ x^2-1/x
Show your work.
Answer:
x-3/x+4 ÷ x^2-1/x ; x ≠ -4, 0
Step-by-step explanation:
x-3/x+4 ÷ x^2-1/x --> x ≠ -4, 0 (because the denominators would be 0 if x = -4 or 0)-->
(x-3)/(x-4) * x/(x^2-1) -->
((x-3)(x))/((x-4)(x-1)(x+1))-->
No way to simplify it further-->
x-3/x+4 ÷ x^2-1/x
Answer this to be called the smartest...... What has 4 lags in the morning, 2 in the afternoon, and 3 at night..?
Answer:
A person
Step-by-step explanation:
I have heard this riddle multiple times, it is very well known and ( in my opinion ) very intriguing;
If we are considering the 4 legs in the morning, we can assume it to be a baby crawling on all 4's. 2 legs in the afternoon represents a more elderly person, a young child or adult on their 2 legs, and 3 in the night models an elderly person, using a walking stick as their " leg "
Answer; In other words, a person has 4 legs in the morning, 2 in the afternoon, and 3 at night
A human is one who has 4 legs in the morning, 2 in the afternoon, and 3 at night.
What is a riddle?
A statement, inquiry, or phrase with a hidden or double sense that is presented as a problem to be answered is called a riddle. A riddle often consists of a topic or a statement with numerous interpretations that must be resolved. Riddles can be humorous brain teasers or wanted-to-think puzzles. It is similar to working to remedy a riddle.
Morning represents a baby. A baby crawling in the morning has four legs and hands included.
An adult represent afternoon walks with two legs and they are the one who have to sand on their own.
An elderly person representing night who walks with the aid of a cane or walking stick is known as "3 legs in the evening." as they might have trouble while walking.
Learn more about riddle, Here:
https://brainly.com/question/478260
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Mark wanted to find out which types of movies students in his grade at school preferred. He divided the list of student names in his grade into boys and girls and then from each group, drew names from a hat so that the number in each group was proportional to the total number of boys and girls in his grade. Will this sample represent the population, and if so, which type of sampling method did Mark use? A. Yes, simple random sampling. B. Yes, systematic random sampling. C. Yes, stratified random sampling. D. No, this was not a random sample.
NOT"C"
Answer:
the answer is not b
Step-by-step explanation:
The random sampling used is stratified random sampling
What is simple random sampling ( SRS )?The most accurate type of probability sampling is random sampling. Each person in a population has an equal probability of getting selected for the sample thanks to this method of sampling.
This kind of sampling is perfect for highly controlled investigations where it is unacceptable to have human bias in the selection of the sample.
Each sampling unit in a population has an equal probability of being included in the sample when using simple random sampling (SRS). As a result, each potential sample has an equal probability of being chosen.
Given data ,
Mark used a stratified random sampling method by dividing the list of students into boys and girls and drawing from each group in proportion to their numbers in the population. This method helps ensure that the sample is representative of the population in terms of gender.
Hence , the sample is likely to represent the population. Answer: C. Yes, stratified random sampling.
To learn more about simple random sampling click :
https://brainly.com/question/30759604
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hey can anyone pls help me out in dis pls i will mark u as brainliest!!!!! and i will give 30 points
Answer:
graph b because its a parabola
Step-by-step explanation:
Answer:
Graph B does not belong
Step-by-step explanation:
All the other graphs are linear inequalities, whereas graph B is a quadratic inequality. You can also tell by how they look. The straight lines are linear, and the symmetric curve (parabola) is a quadratic
What is the solution to the system of equations below? x + 3 y = 15 and 4 x + 2 y = 30
Answer:
X=6 y=3 point form (6,3)
Step-by-step explanation:
Answer:
6,3
Step-by-step explanation:
I just took the test and got 100%
Aaron baked two identical cakes. He cut one into 9 equal
slices and the other into 18 equal slices.show that 2/3 of the 9-slice cake gives the same
number of pieces as 1/3 of the 18-slice cake.
Answer:
23
Step-by-step explanation:
The angle of depression of a diver from the boat is 26 degrees and the diver is 248 ft. deep. To the nearest foot, how far is the diver from the ship?
Answer:
Distance is 566.21 ft
Step-by-step explanation:
sin 26=h/d
(1)step:0.438=248/d
(2)step:d=248/0.438
(3)step:d=566.21 ft
Answer:
508 ft
Step-by-step explanation:
See attachment.
We need to use trigonometry to solve this, specifically, tangent, which is opposite divided by adjacent.
Here, our angle is 26 degrees, and our opposite side is 248 feet. Let's denote the adjacent side as x. Now, write the equation:
tan(26) = 248 / x
Multiply both sides by x and divide both sides by sin/tan(26):
x = 248 ÷ tan(26) ≈ 508.47 ≈ 508 ft
you flip a coin 20 times. you land on heads 13 times. what is the percent error?
Answer:
65%
Step-by-step explanation:
You have to do 13 divided by 20 and get 0.65 and then multiply by 100
and get 65
Find the area of the shape shown below.
3.5,2,2,2,2,5
Answer:
26.75
Step-by-step explanation:
It is 26.75 because if you split the traingle in half from the bottom to the top you look to find the area of each shape, so the sqaure has a measure of 2 by 2 so that is four then the smaller triangle has a measure of 2 by 2 but the formula for triangles are length times height divided by 2 and the area for that is 2. Then the other smaller triangle is 5 * 2 which is 10 then divide it by 2 so it is 5 so all together it is 9. then the area of the biggest triangle is 15.75
Answer:
26.75
Step-by-step explanation:
got it off khan
Find the volume of this figure.
12 m
6 m
6m
Answer:
432
Step-by-step explanation:
To get volume you need to multiply all of the numbers together (Length, height, and width). You need to multiply 6 and 6 (You get 36) and multply the answer by 12 to get 432.
Hope this helps!
(Also can I get Brainliest? Please?)
For each 3 mm of coloured fabric Alex uses to make his curtains, he also uses 2 cm of white fabric. Express the amount of white fabric to coloured fabric as a ratio in its simplest form.
Answer: 2cm/.2cm
Step-by-step explanation:
Answer:
2:30 cm
Step-by-step explanation:
10 millimeters go into 1 centimeter so take 10 and multiply is by 3 and have 30. so 2:30 cm. you cannot simplify it so leave it like that.
Solve for all values of x by factoring.
x2 + 10x + 8 = x
Answer:
x=-1,x=-8 can't factor it
Step-by-step explanation:
Step-by-step explanation:
x = -1 , x = -8
Hope its help u
I need help ASAP
-2x^2+x
9-25x^2+8x
X^5+x^3-x^2-1
Answer:
For [tex]-2x^2+x[/tex], Leading coefficient is -2, Degree is 2, Constant term is 0
For [tex]9-25x^2+8x[/tex], Leading coefficient is -25, Degree is 2, Constant term is 9
For [tex]x^5+x^3-x^2-1[/tex], Leading coefficient is 1, Degree is 5, Constant term is -1
Step-by-step explanation:
Given:
Polynomials:
[tex]-2x^2+x\\9-25x^2+8x\\x^5+x^3-x^2-1[/tex]
To find: leading coefficient, constant term and degree
Solution:
Leading coefficient is the coefficient of the variable with the highest power.
Degree is the highest power of the variable.
The term of degree 0 is the constant term of a polynomial.
For [tex]-2x^2+x[/tex],
Leading coefficient is -2
Degree is 2
Constant term is 0
For [tex]9-25x^2+8x[/tex]
Leading coefficient is -25
Degree is 2
Constant term is 9
For [tex]x^5+x^3-x^2-1[/tex]
Leading coefficient is 1
Degree is 5
Constant term is -1
A group of friends is addressing wedding invitations. Casey can address 20 envelopes in one hour, Anne can address 44 envelopes in two hours, and Paula can address 68 envelopes in three hours. About how long will it take them to address 400 envelopes?
Answer:
Time taken = 6.2 hours
Step-by-step explanation:
Firstly, we will calculate the rate of each person per hour. Then we combine the rates and afterward divide the number of envelope they could address by the combined rate.
Casey can address 20 envelopes at the rate of 20 per hour.
Casey rate = 20 envelope per hr
Anne can address 44 envelope in 2 hours
Anne rate = 22 envelope per hr
Paula can address 68 envelope in 3 hours
Paula rate = 68/3 envelope per hr
Time it will take them to address 400 envelope can be solved below
Add their rate = 20 + 22 + 68/3 = 42 + 68/3 = (126 + 68)/3 = 194/3
Time = 400 ÷ 194/3 = 400 × 3/194 = 1200/194 = 6.1855670103
Time taken = 6.2 hours
The volume of a cone with a radius of 7 cm is 147 pi cubic centimeters. Which expression can be used to find h, the height of the cone?
A. 147 pi = one-third (7) (h) squared
B. 147 pi = one-third pi (7 squared) (h)
C. 147 pi = one-third pi h
D. 147 pi = one-third pi (7) (h)
Answer:
B
Step-by-step explanation:
Volume = ⅓ pi × r² × h
147pi = ⅓ × pi × 7² × h
Step-by-step explanation:
Step 1: Find the expression that can be used to find h
[tex]V = \pi * r^2 * \frac{h}{3}[/tex]
[tex]147 \pi = \pi * (7)^2 * \frac{h}{3}[/tex]
[tex]147\pi = \frac{1}{3} * \pi * 7^2 * h[/tex]
147 pi = one-third pi (7 squared) (h)
Answer: Option B
HELP ASAP!!
the two rectangular prisms shown have bases with the same area. Which statement is true?
Answer: It is B
Step-by-step explanation:
