HELP ME ASAP! Will give BRAINLIEST! Please read the question THEN answer correctly! No guessing. Check ALL that apply.
Answers
Answer:
A. -4
C. 3
Step-by-step explanation:
x² + x - 12 =0
-12 = 4*(-3) and 4+(-3) =1
(x+4)(x-3)=0
x = - 4, x = 3
Related Questions
What parallelogram has a base of 2 units and a height of 4 units
Answers
Answer:
C
Step-by-step explanation:
The parallelogram in C has a base of 2 units and a height o 4 units.
Y= - x+2 Y=3x-4
Estimate the solution to the system of equations
Answers
Answer:
[tex]x=\frac{3}{2}\\ y=\frac{1}{2}[/tex]
Step-by-step explanation:
[tex]y=-x+2\\y=3x-4[/tex]
Let's solve one of them for x.
[tex]y=3x-4[/tex]
Add 4
[tex]y+4=3x[/tex]
Divide by 3.
[tex]x=\frac{y+4}{3}[/tex]
Now, plug the value of y in the formula, or you can plug the value of x in the other equation. I'll take this one.
[tex]x=\frac{y+4}{3}[/tex]
[tex]x=\frac{(-x+2)+4}{3}[/tex]
[tex]x=\frac{-x+2+4}{3}[/tex]
[tex]x=\frac{-x+6}{3}[/tex]
Multiply by 3 to get rid of the denominator.
[tex]3x=-x+6[/tex]
add x
[tex]3x+x=6[/tex]
Combine like terms;
[tex]4x=6[/tex]
Divide by 4.
[tex]x=\frac{6}{4}[/tex]
Simplify.
[tex]x=\frac{3}{2}[/tex]
Now that you found the value of x, replace it in any of the equations to find y.
[tex]y=-x+2\\y=-(\frac{3}{2})+2\\ y=-\frac{3}{2}+2[/tex]
[tex]y=\frac{-3+2*2}{2} \\y=\frac{-3+4}{2} \\y=\frac{1}{2}[/tex]
Proof:
[tex]y=3x-4\\\frac{1}{2}=3(\frac{3}{2})-4\\\frac{1}{2}=(\frac{9}{2})-4[/tex]
[tex]\frac{1}{2}=\frac{9-4*2}{2}[/tex]
[tex]\frac{1}{2}=\frac{9-8}{2}[/tex]
[tex]\frac{1}{2}=\frac{1}{2}[/tex]
Rewrite the percentage in the sentence below as a decimal.
The 20 overseas investors own 7.2% of the business.
Answers
Answer:
0.072
Step-by-step explanation:
Answer:0.072
Step-by-step explanation:
7.2% = 7.2/100
7.2 ➗ 100=0.072
Jason and Melinda are both driving from Fort Worth, Texas, to Van Horn, Texas. Jason leaves at 8:30 and averages 60 mph (miles per hour) on the way. Melinda leaves at 9:00 and averages 70 mph on the way. The situation is modeled by this system, where x is the number of hours after melinda leaves and y is the distance each will travel : y=60 x+30 y=70 How long after Melinda leaves will she pass Jason, and how far will they each have traveled?
Answers
Answer:
Melinda will pass Jackson 3 hours after she leaves.
They will have traveled 210 miles.
Step-by-step explanation:
We need to build linear functions for their positions starting at 9 am.
We choose 9 am because it is the time of the last person leaving.
Melinda:
Leaves at 9 (from position 0).
Averages 70 mph.
So
[tex]y_{M}(t) = 70t[/tex]
Jason:
Leaves at 8:30, 60 mph.
At 9, when Melinda leaves, 30 minutes(half an hour will have passed). He will be at the position 0.5*60 = 30. So
[tex]y_{J}(t) = 30 + 60t[/tex]
How long after Melinda leaves will she pass Jason
This is t for which:
[tex]y_{M}(t) = y_{J}(t)[/tex]
[tex]70t = 30 + 60t[/tex]
[tex]10t = 30[/tex]
[tex]t = \frac{30}{10}[/tex]
[tex]t = 3[/tex]
Melinda will pass Jackson 3 hours after she leaves.
How far will they each have traveled?
Either [tex]y_{M}(3)[/tex] or [tex]y_{J}(3)[/tex]. They are the same value.
[tex]y_{M}(3) = 70*3 = 210[/tex]
They will have traveled 210 miles.
Answer:
Melinda will pass Jackson 3 hours after she leaves.
They will have traveled 210 miles.
Step-by-step explanation:
helppppppppppppppppppp
Answers
Answer: im like 90 percent sure its c
Step-by-step explanation:
Given f(x)=2x^2-8x+6 and g(x)=3x-1, what is f(x)+g(x) ?
Answers
Answer:
2x^2 -5x +5
Step-by-step explanation:
f(x)=2x^2-8x+6 and g(x)=3x-1
f(x)+g(x) = 2x^2-8x+6 +3x-1
Combine like terms
= 2x^2 -5x +5
Answer:
2x^2 -5x +5
Step-by-step explanation:
The plans for a home renovation include a new window. The homeowner picked a window shaped like the one shown. Identify the polygon and classify it as regular or irregular.
Answers
Answer:
Octagon regular.
Step-by-step explanation:
This shape has 8 sides to it is an octagon. A octagon irregular doesn't have equal sides while this one does. The best way to tell is if it looks like a stop sign which are octagon regular.
whats the product of 6 and
q
Answers
Answer:
6q or 6 * q
Step-by-step explanation:
As you do not know what the value of the variable q is, you are essentially changing it from word form to expression form.
"product" in math means multiply, so you are multiplying 6 with q.
6q is your answer.
~
Answer:
6+9=15
6×9=54
Step-by-step explanation:
didnt know which one you wanted but hope this helps
just need the first question
Answers
Answer:
[2,3)
Step-by-step explanation:
[0,1), [0,1),[0,1),[0,1)
[1,2), [1,2),[1,2),[1,2),[1,2),[1,2),[1,2),[1,2)
[2,3),[2,3),[2,3),[2,3),[2,3),[2,3),[2,3),[2,3),[2,3),[2,3),[2,3)
[3,4),[3,4),[3,4),[3,4),[3,4),[3,4),[3,4)
If f(x) = 3x + 7, what is f(-2)?
Answers
Answer:
f(-2)= -2f
Answer: -2f
Slope of -2f: m= -2
Inverse of -2f: -f/2
Step-by-step explanation:
1: Simplify
2: Domain of -2f
3: Range of -2f
4: Parity of -2f: Odd
5: Axis interception points of -2f: X intercepts: (0,0), Y intercepts: (0,0)
Plotting: y= -2 x
Hope this helps.
In polar coordinates, the positive x-axis is called the __
axis.
Answers
Answer:
Polar axis.
Step-by-step explanation:
When looking at characteristics of a Polar Graph, the positive x-axis is called the Polar axis.
Answer:
polar axis.
Step-by-step explanation:
j+ 12 =25 find the solution to equation algebtaically
Answers
Answer:
j= 13
just subtract 12 from 25
Start by isolating the j.
Subtract 12 from both sides.
On the left, the 12 and -12 cancel.
On the right, 25 - 12 is 13.
So we have j = 13.
The cost, in dollars, to produce 1 watt of solar energy is a function of the number of years
since 1977.t.
From 1977 to 1987, the cost could be modeled by an exponential function. Here is the
graph of the function.
80
60
dollars per Watt
40
20
4
8
10
6
years since 1977
1. What is the statement f (9) 36 saying about this situation?
2. What is f(4)? What about f (3.5)? What do these values represent in this context?
3. When f(t) = 45, what is t? What does that value of t represent in this context?
4. By what factor did the cost of solar cells change each year? (If you get stuck consider
creating a table.)
Answers
Answer:
In the figure attached, the graph of the function is shown.
1. f(9) ≈ 6 means that at t = 9 (year 1977 + 9 = 1986) the cost to produce 1 watt of solar energy was $6
2. f(4) ≈ 25, which means at year 1981 (=1977 + 4) the cost was $25 per watt
f(3.5) ≈ 28, which means at half of year 1980 (=1977 + 3.5) the cost was $28 per watt
3. When f(t) = 45, t is equal to 2, which means that the year wass 1979 (= 1977 + 2)
4. From the graph we can compute the following table:
x | y
0 | 80
1 | 60
The general exponential decay formula is:
f(x) = a*b^x
where a is the initial value and b si the decay factor. Replacing with data from the table:
f(0) = a*b^0
80 = a
f(1) = a*b^1
60/80 = b
0.75 = b
Write a recursive formula for the sequence
-1,-2,-3,-4...
Answers
Answer:
f(1) = -1
f(n) = f(n-1) -1
Step-by-step explanation:
The first term is -1. Each term is 1 less than the previous. These equations say that.
f(1) = -1
f(n) = f(n-1) -1
The table shows the travelling time to work of 50 people.
-Travelling time (t)
in minutes-
0 <t<10
10 < t < 20
20 < t < 30
30 < t < 40
40 < t < 50
-Frequency-
5
15
13
10
7
Calculate an estimate of the mean travelling time.
Answers
Answer:
24.8 mins
Step-by-step explanation:
Time > timemark > frequency
0 – 10 > 10/2 = 5 > 5
10 – 20 > (10+20)/2 = 15 > 15
20 – 30 > (20+30)/2 = 25 > 13
30 – 40 > (30+40)/2 = 35 > 10
40 – 50 > (40+50)/2 = 45 > 7
The mean time for the 50 people is given by:
Mean = summation (mid time x frequency) / total frequency
Mean = [5x5 + 15x15 + 25x13 + 35x10 + 45x7] / 50
Mean = [25 + 225 + 325 + 350 + 315] / 50
Mean = 1240 / 50
Mean = 24.8 mins
The mean traveling time of the given data will be 24.8 minutes.
What is Mean?The mean is the straightforward meaning of the normal of a lot of numbers. In measurements, one of the markers of focal propensity is the mean.
Time > timemark > frequency
0 – 10 > 10/2 = 5 > 5
10 – 20 > (10+20)/2 = 15 > 15
20 – 30 > (20+30)/2 = 25 > 13
30 – 40 > (30+40)/2 = 35 > 10
40 – 50 > (40+50)/2 = 45 > 7
The mean time for the 50 people is given by:
Mean = summation (mid time x frequency) / total frequency
Mean = [5x5 + 15x15 + 25x13 + 35x10 + 45x7] / 50
Mean = [25 + 225 + 325 + 350 + 315] / 50
Mean = 1240 / 50
Mean = 24.8 mins
The mean traveling time of the given data will be 24.8 minutes.
More about the mean link is given below.
https://brainly.com/question/521501
#SPJ2
A 13-pound mixture of coffee that contains both decaffeinated and regular coffee costs $34. The decaffeinated coffee costs $2 per pound, and the regular coffee costs $3 per pound. (a) Let x be the weight of the decaffeinated coffee and y be the weight of the regular coffee. Write a system of equations whose solution gives the amount of each type of coffee in the mixture. (b) Use the method of substitution to solve the system of equations.
Answers
Answer:
Weight of decaf coffee = 5 pounds.
Weight of regular coffee = 8 pounds.
Step-by-step explanation:
(a) Let x be the weight of decaf coffee and y the weight of regular coffee. Then:
x + y = 13
2x + 3y = 34
(b) From the first equation x = 13 - y, so substituting for x in second equation:
2(13 - y) + 3y = 34
26 - 2y + 3y = 34
y = 34 - 26 = 8.
Substituting for y in the first equation:
x + 8 = 13
x = 5.
Factor the expression. d2 + 12d+ 36
Answers
Answer:
the factored expression is
(d+6)(d+6) or (d+6)^2
Step-by-step explanation:
Giving brainliest for CORRECT awnser.
Answers
Answer: x - 8
Step-by-step explanation:
Factor it and you'll be fine.
Question 13
Factor the trinomial, if possible. If the trinomial cannot be factored using integers, write prime.
t2 – 2t + 4
a) (t – 4)(t – 4)
b) (t + 4)( t + 2)
c) prime
d) (t + 4)(t – 2)
Answers
Answer:
Step-by-step explanation:
Try completing the square: t^2 - 2t + 1 - 1 + 4 becomes (t - 1)^2 + 3. If we set this equal to zero we get (t - 1)^2 = -3. Normally we'd take the square root of both sides, but because that -3 is negative, this is not possible, and the square root of positive 3 is not integer. Thus, the correct response here is "prime."
y varies directly as x.y = 52 when x=4. Find y when x= 10.
y=
(Simplify your answer.)
Answers
Answer:
9ha
shhsi a sa.anjwkw a zkaq
A tennis ball machine shoots 21 forehands 25 backhands and 9 lobs if a player missed 6 forehands 17 backhands and 2 lobs how many balls were hit
Answers
Answer:
30
Step-by-step explanation:
55 - 25 = 30
Sara needs 3 cups of orange juice and 2 cups of pineapple for punch recipe. She only has a half cup measure. How many half cups of juice does she need?
Explain your thinking here:
write your answer here:
Answers
Answer:
10
Step-by-step explanation:
3+2 = 5
5x2 (Because only half cups)
= 10
There are 100 videos available to download for free. 25 are drama, 17 are
romance, 16 are comedy, 12 are horror, 18 are action, and the rest are
cartoons. Once you download the video, it cannot be replaced. What is
the probability that the videos are downloaded in this order: comedy,
horror, cartoon? Is this a dependent or independent event? *
A. Independent, 36/15625
B. Dependent, 36/15625
C. Independent, 32/13475
D. Dependent, 32/13475
Answers
Answer:
B dependent, 36/15625
Step-by-step explanation:
1/5 of the shoes in a factory are green. If you pick a shoe, replace it, pick another shoe and replace it, and pick a third shoe, what is the probability that none of the shoes are green? The answer needs to be in fraction form.
Answers
Answer: I believe it’s 3/5
Step-by-step explanation:
Answer:
7/5
Step-by-step explanation:
just add gtwebtewgbrwgragtgwgtrwgtwebgrw
1
2
5
6
7
A six-sided number cube is rolled twice.
What is the probability that the first roll is an even number and the second roll is a number greater than 4?
1
6
1
3
2
3
5
6
Answers
Answer:
1/6
Step-by-step explanation:
3/6 for even 3/6*2/6-----1/2*1/3
write an equation of the line that has a slope of 9 and y-intercept of -3
Answers
Answer: y = 9x - 3
That's y=mx + b, the usual slope intercept form of a line with slope m and y intercept b.
Step-by-step explanation:
The equation of a line is y = mx + b, where m is the slope and b is the y-intercept. We know that m = 9 and b = -3, and when we plug those in, we get y = 9x - 3. Hope this helps!
Which of the following is not a binorrial experiment?
a Asking 100 people whether or not the like pizza.
b. Measuring the height of 100 people to see if they are over 61.
Asking 100 people what their favorite color is.
d. Asking 100 people if their favorite color is red.
Answers
Answer:
You don't need experiments to ask people questions
John and Ellen bought a big pizza. Ellen are 2/4 of the pizza and John ate 1/3 of pizza. How much did they eat all together? How much was left over? ( hint 12 is the lowest common denominator)
(I put 1/4 but it said it was wrong:/) pls help h
Answers
Answer:
Pizza eaten together: 5/6,
Pizza left over: 1/6
Step-by-step explanation:
~ If Ellen ate 2/4th of the pizza and John ate 1/3 of the pizza, provided that the pizza counts as a whole ( 1 )... ~
1. Let us simplify 2/4th to be ⇒ 1/2, through simple algebra
2. To see how much they ate together we would neglect that the pizza counts as a whole but simply add 1/2 by 1/3rd.
3. Through simple algebra: 1/2 + 1/3 = 3/6 + 2/6 = Pizza eaten together: 5/6
4. Now to find out how much pizza was left over, we would need the fact that a pizza ⇒ 1 whole. It would be that 1 - 1/2 - 1/3 ⇒ Pizza left over, through the Partition Postulate. In fact, the pizza left over would simply be 1 whole - the pizza eaten together ( 5/6 ).
5. Through algebra: 1 - 1/2 - 1/3 = 1 - 5/6 = Pizza left over: 1/6
Answer:
How much did they eat all together? 5/6
How much was left over? 1/6
[tex] \\ [/tex]
Step-by-step explanation:
How much did they eat all together?
[tex] \frac{2}{4} + \frac{1}{3} \\ = \frac{6}{12} + \frac{4}{12} \\ = \frac{10}{12} \\ = \frac{5}{6} [/tex]
[tex] \\ [/tex]
How much was left over?
[tex] 1 - \frac{5}{6} \\ = \frac{6}{6} - \frac{5}{6} \\ = \frac{1}{6} [/tex]
WILL GIVE BRAINLIEST
Ricky has a bowl with 80 jelly beans in it there are 16 red, 24 green 12 yellow, 20 orange, and 8 black jelly beans ricky takes one jellybean from the bowl without looking what is the possibility that it is a yellow jellybean
Answers
Answer:
Probability = number of yellow jellybeans / total number of jellybeans
= 24 / 80
= 3/10.
Step-by-step explanation:
Answer:
15%
Step-by-step explanation:
There are 80 total jelly beans, as stated in the question. Therefore, there are 80 "Total Events".
There are 12 yellow jellybeans in the bowl. Therefore, there are 12 preferred events, since the question asks the probability of pulling one yellow jellybean randomly.
[tex]\frac{\text{Preferred Events}}{\text {Total Events}} =\frac{12}{80}[/tex]
I do not know what form the question prefers, so I did the probability in all forms.
Probability as a decimal:Divide 12 by 80.
[tex]12/80 = 0.15[/tex]
There is a 0.15 chance that Ricky would pull out a yellow bean.
Probability as a Percent:Divide 12 by 80.
[tex]12/80=0.15[/tex]
Convert into a percent. Multiply 0.15 by 100.
[tex]0.15*100=15[/tex]
There is a 15% chance that Ricky would pull out a yellow bean.
Probability as a Fraction:Simplify 12/80.
[tex]\frac{12/2}{80/2} =\frac{6/2}{40/2} =\frac{3}{20}[/tex]
There is a [tex]\frac{3}{20}[/tex] chance that Ricky would pull out a yellow bean.
Brainilest Appreciated!
29. Find the circumference.
11
a. 3.14
b. 69.08
c. 121
Answers
Answer:
b.69.08
Step-by-step explanation:
formula:
c=2(pi)r
c=2(pi)11
Answer:b
Step-by-step explanation:
radius=r=11
π=3.14
Circumference=2 x π x r
Circumference=2 x 3.14 x 11
Circumference=69.08
