Plz help I don’t understand this question:)

Answer:

-3k

Step-by-step explanation:

k-1+1-4k

k-4k

-3k

Answer:

Step-by-step explanation:

145+15x>490. subtract 145 from both sides

15x>345, divide both sides by 15

x>23

So she will need to run for more than 23 weeks to reach her goal.

Answer:

10:26

Step-by-step explanation:

Answer:

x = -4

y = -25

Step-by-step explanation:

Since one of the equations is already set with one variable as the subject ( y = 7x + 3) substitute that into the one below it:

9x - 2y = 14

9x - 2(7x + 3) = 14

9x - 14x - 6 = 14

-5x = 20

x = -4

Substitute this into one of the equations and solve for the other variable:

y = 7x + 3

y = 7(-4) + 3)

y = -28 + 3

y = -25

hope this helps!

Answer:

(- 4, - 25 )

Step-by-step explanation:

Given the 2 equations

y = 7x + 3 → (1)

9x - 2y = 14 → (2)

Substitute y = 7x + 3 into (2)

9x - 2(7x + 3) = 14 ← distribute and simplify left side

9x - 14x - 6 = 14

- 5x - 6 = 14 ( add 6 to both sides )

- 5x = 20 ( divide both sides by - 5 )

x = - 4

Substitute x = - 4 into (1) for corresponding value of y

y = 7(- 4) + 3 = - 28 + 3 = - 25

solution is (- 4, - 25 )

Answer:

D

Step-by-step explanation:

18x=2-8

18x=-6

x=-3

that would be my answer if not then ask someone else

Answer: 5/6.

Step-by-step explanation: . :)

Answer:

i think the answer would be C

Step-by-step explanation:

hope this helped

Answer:

Yes, that is true.

Step-by-step explanation:

The bounded regions of the two inequalities do not overlap, so there is no solution set. However, the existence of parallel lines does not necessarily indicate that there is no solution, it just means that there is the possibility of no solutions.

Answer:

700

Step-by-step explanation:

7 x 8 x 12.5 = 700

Answer:

First Problem. 17x , 17 + x, and 7x + 10x

Second Problem. 2 + 12y, 2x1 + 2x6y

Step-by-step explanation:

Answer:

11=DE

Step-by-step explanation:

3x-28+3x-30+x=33

7x-58=33

7x=91

x=13

3(13)-28

39-28=11

Answer:

See explanations below

Step-by-step explanation:

We are going to be using the point slope form of equation of a line for all the question, This is expressed as;

y-y0 = m(x-x0)

1) For a straight line is perpendicular to y=2x+5 and passes through (0,3).

Slope of the line m = 2

Slope of the line perpendicular M = -1/m

M = -1/2

Substituting M = -1/2 and the point (0,3) into the equation

y-y0 = m(x-x0)

y - 3 = -1/2(x-0)

y-3 = -x/2

2(y-3) = -x

2y-6 = -x

-x-2y = -6

x+2y = 6

The required equation is x+2y = 6

2) For a straight line is perpendicular to y=0.5x+3 and passes through (3,5).

Slope of the line m = 0.5

Slope of the line perpendicular M = -1/m

M = -1/0.5

M  = -2

Substituting M = -2 and the point (3,5) into the equation

y-y0 = m(x-x0)

y - 5 = -2(x-3)

y-5 = -2x+6

y+2x = 6 + 5

y+2x = 11

The required equation is y+2x = 11

3) A straight line is perpendicular to y=4-5x and passes through (20,5).

Slope of the line m = -5

Slope of the line perpendicular M = -1/m

M = -1/-5

M  = 1/5

Substituting M = -2 and the point (20,5) into the equation

y-y0 = m(x-x0)

y - 5 = 1/5(x-20)

5(y-5) = x-20

5y-25 = x-20

5y-x = -20+25

5y-x = 5

The required equation is 5y-x = 5

Answer:

12cm ...........

........

Answer:

tab, bat and sometimes abt

Step-by-step explanation:

Answer:

∠BAT,∠TAB,∠A

Step-by-step explanation:

Answer:x(3x

2

−1)

2

×3x

3

Step-by-step explanation:

Answer:

b

Step-by-step explanation:

b

Answer:

-5/8

Step-by-step explanation:

I think this is the correct answer I'm not sure

Answer:

x=-5/8

Step-by-step explanation:

To answer you must get only x on one side of the equation.

Answer:

Eastside=2.25+3g

Westside=1.75+2.5g

Cost difference=.5+.5g

think of this as finding the area of a box. if each side of the box is one foot long, or 12 inches long, you need to multiply length times width to find the square inches. in this case it would look like:

A= 12in x 12in

12in x 12in = 144in^2

A = 144 in^2

therefore there are 144 square inches in one square foot.

Answer:

it is 144

Step-by-step explanation:

a did the test and i picked 12 and it was wrong and 24 is wrong n i cant belive i got it wrong :(

Answer:

2338.27 is the answer 2338 if you round it

Step-by-step explanation:

Answer: 18

Step-by-step explanation:

First we need to solve for x to find the measure of the adjacent angle.

-6x+64 = 8x + 162

subtract 162 to leave x by itself

-6x- 98 = 8x

add 6x to both sides

-98 = 14x

now divide by 14

x = -7

Now solve one of the given equations to find the measure of the adjacent angle.

8(-7)+162

-56 + 162 = 106

Meaning the measure of angle 8 is 18

because they'll add up to 180(The measure of the line)

Answer:

measure of angle 8 is 16 6/7

Step-by-step explanation:

-6x+64=8x+62 because there is a transversal.

2=14x

x=2/14

so, now you have to find 8x+162. 163 1/7 degrees. (Plug in variables)

measure of the angle we just found + measure of angle 8 is 180 degrees.

(straight line definition) so 180-163 1/7= 16 6/7

measure of angle 8 is 16 6/7

Answer:

The answer is -34

Step-by-step explanation:

3-33-4=-34

Answer:

9³

Step-by-step explanation:

We need to find the value of [tex]\dfrac{9^5}{9^2}[/tex].

We know that,

[tex]\dfrac{x^a}{x^b}=x^{a-b}[/tex]

Here, a = 5 and b = 2.

So,

[tex]\dfrac{9^5}{9^2}=9^{5-2}\\\\=9^3[/tex]

So, the answer to the given expression is 9³.