If possible, factor the quadratic expressions.

Answer:

-2a-6a=15+9

-8a=24

a=24/-8

a=-3

Answer:

a=-3

Step-by-step explanation:

-2a-6a=15+9

-8a=24

a=-3

Answer:

No solution

Step-by-step explanation:

3x = 3x + 4

-3x  -3x

0 = 4

Examples of solutions:

2 = 2 infinite solutions

x = 2 one solution

2 = 0 no solution

Answer:

5 dollars left

Step-by-step explanation:

4 x 5 is 20

then 20-15 is 5

hope this helps luv

Answer:

i think it might be d

Step-by-step explanation:

Answer:

Perimeter = 18

Step-by-step explanation:

P=2(l+w)=2·(7+2)=18cm

Answer:

y=3/4x+5

Step-by-step explanation:

Well to begin with make the slope perpendicular so so far we have y=3/4x but than it needs to go through that point so we input the X in that point into our current equation to get y=-3 but we need to make it y=2 so we change our equation to y=3/4x+5 and that is your equation  

Answer: She will pay $52.68, including taxes

Step-by-step explanation: One can of tennis ball is $4 and there are no discount on it. Elena bought 3 cans, so:

can = 3 x 4 = 12

One tennis racket is $43 but it has a discount of 15%:

discount = 0.15 x 43 = 6.45

total racket = 43 - 6.45 = 36.55

Elena will have to pay:

pay = 12 + 36.55 = 48.55

She will also have to pay taxes, which are 8.5% over the price she paid:

pay + tax = 48.55 x 0.085 = 4.13

total to pay = 48.55 + 4.13 = 52.68

Buying 3 can of tennins ball and one racket, Elena paid $52.68, including taxes.

Answer:

slope is -1/12

Step-by-step explanation:

slope =y2 - y1 / x2-x1

Answer:

Sorry but thats too cunfusing for me sorry I couldn't help

Step-by-step explanation:

best of luck

Answer:

No solution or B

Step-by-step explanation:

Multiply eq1 by 3.

3y=18x+6

3y-18x=12

Regroup:

18x-3y=-6

-18x+3y=12

Add:

0=6???

Impossible

So no solution.

Hope this helps plz mark brainliest :D

Answer:

No solution

Step-by-step explanation:

First we need to solve the equations.

I'll use the combining method

To do the combining method you need to get one of the variables in the first equation to be the negative correspondent to the same variable in the second equation.

(Ex:

If there was 2x in the first equation we would want there to be -2x in the second so they cancel out.)

y=6x+2

subtract 6x from each side to get the variables to line up

y-6x=2

3y-18x=12

To get -6x to equal 18x, we will multiply everything in the first equation by -3

-3y+18x=-6

3y-18x=12

Now combine the two terms

-3y and 3y cancel out

18x and -18x cancel out

-6+12=6

We are left with 0=6.

0 does not equal 6 so there is no solution.

Answer:

Brianna is right. The quotient is in the hundreds place ,because the first digit is 2 spaces to the left from the comma/period ,thus we know it's a hundred

Answer:

Step-by-step explanation:

Given

Reflection over y-axis results in same y-coordinate and opposite x-coordinate

Answer:the photo is for part A.

B) the weight would be Invnorm(.25,77,6)=72.95

C)the weight would be 81.04 but this is the work invnorm(.75,77,6)=81.04

D)IQR=Q3-Q1

81.04-72.95=8.09

E)9.12 is the answer the work normalcdf(85,1000,77,6)=.0912

F).6892 or 68.92% are the answers the work normalcdf(60,80,77,6)=.6892

G).0227 or 2.27% is the answer and the work normalcdf(0,65,77,6)=.0227

Step-by-step explanation:

Using the normal distribution, we have that:

----------------------

Problems of normal distribution can be solved using the z-score formula.

In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the z-score of a measure X is given by:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

----------------------

----------------------

Item b:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]-0.675 = \frac{X - 77}{6}[/tex]

[tex]X - 77 = -0.675(6)[/tex]

[tex]X = 72.95[/tex]

A weight of 72.95 pounds would represent the 25th percentile.

----------------------

Item c:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]0.675 = \frac{X - 77}{6}[/tex]

[tex]X - 77 = 0.675(6)[/tex]

[tex]X = 81.05[/tex]

A weight of 81.05 pounds would represent the 75th percentile.

----------------------

Item d:

The interquartile range is the difference between the 75th and the 25 percentile, thus:

[tex]81.05 - 72.95 = 8.1[/tex]

The interquartile range is of 8.1 pounds.

----------------------

Item e:

The proportion is 1 subtracted by the p-value of Z when X = 85, thus:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]Z = \frac{85 - 77}{6}[/tex]

[tex]Z = 1.33[/tex]

[tex]Z = 1.33[/tex] has a p-value of 0.9082.

1 - 0.9082 = 0.0918.

0.0918 = 9.18% of male adult Labrador retrievers weigh above 85 pounds.

----------------------

Item f:

The proportion is the p-value of Z when X = 80 subtracted by the p-value of Z when X = 60, thus:

X = 80:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]Z = \frac{80 - 77}{6}[/tex]

[tex]Z = 0.5[/tex]

[tex]Z = 0.5[/tex] has a p-value of 0.6915.

X = 60:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]Z = \frac{60 - 77}{6}[/tex]

[tex]Z = -2.83[/tex]

[tex]Z = -2.83[/tex] has a p-value of 0.0023.

0.6915 - 0.0023 = 0.6892.

0.6892 = 68.92% of male adult Labrador retrievers weigh between 60 and 80 pounds.

----------------------

Item g:

This proportion is the p-value of Z when X = 65, thus:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]Z = \frac{65 - 77}{6}[/tex]

[tex]Z = -2[/tex]

[tex]Z = -2[/tex] has a p-value of 0.0228.

0.0228 = 2.28% of male adult Labrador retrievers weigh less than 65 pounds.

A similar problem is given at https://brainly.com/question/21628677

Answer:

its y=5x-3

find the y intercept first and the ide over run for slope

Answer:

15 are lime flavored

Step-by-step explanation:

To find the answer you have to divide 30 by 2 to get 15.Because to find half of something you have to divide the number by two.

Have a good day!

what is the question that you need help with

Answer:

a=11

Step-by-step explanation:

Add all expressions to equal 180. (a+20+12a-14+a+20=180)

Combine like terms and solve

You'll get a=11

Answer: y=2x+1       sjsjrhrhfhhhxhh

Answer: its y=-2x-1

Step-by-step explanation:

Answer:

25/4, I believe

Step-by-step explanation:

the rate of change of y with respect to x is 25/4

answer: 4

explanation: it would be 4 because slope is rise/run and it rises 4 and runs one so u would get 4/1 which is 4 simplified. :)

Answer:

Slope: 4

Step-by-step explanation:

The slope is 4, because each time x is increased by 1 y is increased by 4.

The rise would be 4 and the run would be 1.

Since the slope of a graph can be found by dividing rise by run, the slope would be 4/1, which is equal to 4.

Answer:

8.6

Step-by-step explanation:

9514 1404 393

Answer:

  x = -7/2  is not in the domain

Step-by-step explanation:

The numbers that must be excluded from the domain are the ones that make the function be undefined. That is, any value of x that makes the denominator zero will be excluded from the domain.

  2x +7 = 0

  2x = -7

  x = -7/2 . . . . . must be excluded

The only number not in the domain is x = -3.5.

Answer:

there are two answers to this question

1; X=2

and

2;X=+1

Step-by-step explanation:

open the first brackets with an invisible +1

x-1=0

x=0+1

X=+1

open the second bracket with the plus +

x-2=0

X=0+2

X=+2

hence,

X=+1 and +2

Answer:

-5a^2 - a + 6

Step-by-step explanation:

Now, I don't know if you have memorized this very niche trick in Algebra. Don't tell anybody I told you this, as the CIA will chase me down for allegedly sharing higher intelligence, but you can easily expand equations by the method of FOIL (FIRSTS, OUTSIDES, INSIDES, LASTS). Using this method, we multiply -a and 5a, -a and 6, 5a and 1, and 1 and 6. Adding them all together, our expanded form is -5a^2 - 6a + 5a + 6. Adding like terms, our final polynomial is -5a^2 - a + 6.

Answer:

regular price is $22.50

Step-by-step explanation: 22.50*.20=4.5 (discount)

Answer:

Both

Step-by-step explanation:

both???????????????????????????

Given:

The equation is

[tex]\sin\left(x+\dfrac{7\pi}{2}\right)=-\dfrac{\sqrt{3}}{2}[/tex]

To find:

The solutions of given equation over the interval [tex][0,2\pi][/tex].

Solution:

We have,

The equation is

[tex]\sin\left(x+\dfrac{7\pi}{2}\right)=-\dfrac{\sqrt{3}}{2}[/tex]

[tex]\sin\left(x+\dfrac{7\pi}{2}\right)=-\sin \dfrac{\pi }{3}[/tex]

[tex]\sin\left(x+\dfrac{7\pi}{2}\right)=\sin (-\dfrac{\pi }{3})[/tex]

If [tex]\sin x=\sin y[/tex], then [tex]x=n\pi +(-1)^ny[/tex].

Over the interval [tex][0,2\pi][/tex].

[tex]x+\dfrac{7\pi}{2}=4\pi-\dfrac{\pi }{3}[/tex] and [tex]x+\dfrac{7\pi}{2}=5\pi+\dfrac{\pi }{3}[/tex]

[tex]x=\dfrac{11\pi }{3}-\dfrac{7\pi}{2}[/tex] and [tex]x=\dfrac{16\pi}{3}-\dfrac{7\pi}{2}[/tex]

[tex]x=\dfrac{22\pi-21\pi }{6}[/tex] and [tex]x=\dfrac{32\pi-21\pi }{6}[/tex]

[tex]x=\dfrac{\pi}{6}[/tex] and [tex]x=\dfrac{11\pi }{6}[/tex]

Therefore, the two solutions are tex]x=\dfrac{\pi}{6}[/tex] and [tex]x=\dfrac{11\pi }{6}[/tex].

Answer:

C. π/6 & 11π/6

Step-by-step explanation:

If you graph the equation ( Sin (x+7π/2)=-√3/2) and look between 0 & 2π, you'll see that the lines intersect the x-axis at π/6 & 11π/6.