2. Solve the system by substitution. (1 point)
2x – y + z = -4
z = 5
-2x + 3y - 2 = -10
O(-8,7,5)
O(-8. -7,5)
O(8, -7,5)
O(-8, -7,-5)

Answer: x = 30

Step-by-step explanation:

Since AB and CD are straight lines, vertical angles formed by them are congruent. Angle DOB is equal to angle AOC which is equal to 2x. Since you know that a straight angle is equal to 180 degrees, you can say :

2x + 90 + x = 180

3x + 90 = 180

3x = 90

x=30

Hope this helped :)

Answer:

ok:

Step-by-step explanation:

1. 4(x+2)

2. (3x + 5)(3x - 5)

3. [tex](x+2)^2[/tex]

Answer:

1. 4(x+2)

2. (3x+5)(3x-5)

3. (x+2)(x+2)

Step-by-step explanation:

Answer:

73

Step-by-step explanation:

Answer:73

Step-by-step explanation:

45x6=270.270 is the total for the friends.However instead you have to do 45x7=315.Because its Leahs friends and LEAH.So now the car.315+10=325.So your answer is 325

Answer:

Step-by-step explanation:

1.  Equation representing when both companies will cost the same amount :

[tex]350 + 15x = 275 + 20x[/tex]

2. Let x equal the number of hours a job takes , then the first house painting company will charge 350+15x , the second house painting will charge 275 +20x. If the two companies charge the same amount , we will have;  

[tex]350 +15x = 275+20x\\\\350 - 275 = 20x - 15x\\\\75 = 5x\\\\\frac{75}{5} = \frac{5x}{5} \\\\15 = x\\\\x = 15\:hours[/tex]

3. For a job that takes 15 hours , the first company will cost ;

[tex]350 + 15(15) = 575[/tex]

For a job that takes 15 hours , the second company will cost ;

[tex]275+20x\\\\275+20(15)\\\\275 +300\\\\=575[/tex]

Answer: y=15

Step-by-step explanation:

Solution for (5y+3)+(4y+8)=146 equation:

Simplifying

(5y + 3) + (4y + 8) = 146

Reorder the terms:

(3 + 5y) + (4y + 8) = 146

Remove parenthesis around (3 + 5y)

3 + 5y + (4y + 8) = 146

Reorder the terms:

3 + 5y + (8 + 4y) = 146

Remove parenthesis around (8 + 4y)

3 + 5y + 8 + 4y = 146

Reorder the terms:

3 + 8 + 5y + 4y = 146

Combine like terms: 3 + 8 = 11

11 + 5y + 4y = 146

Combine like terms: 5y + 4y = 9y

11 + 9y = 146

Solving

11 + 9y = 146

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '-11' to each side of the equation.

11 + -11 + 9y = 146 + -11

Combine like terms: 11 + -11 = 0

0 + 9y = 146 + -11

9y = 146 + -11

Combine like terms: 146 + -11 = 135

9y = 135

Divide each side by '9'.

y = 15

Answer:

C

Step-by-step explanation:

Keep Change Flip

Keep the first; change divided by multiply; then flip the last

Answer:

The most sense-making answer according to my calculation is B

Step-by-step explanation:

Pls consider marking my answer as Brainliest! It would mean a lot!

Answer:

x=16

Step-by-step explanation:

(16*3)-2

48-2

46

134+46=180

Step-by-step explanation:

1. d=30

2. b=8

3. n=-7

5. v=17

6.x=-13

7. b=48

|-9 + 1| - 4(4)

|-9 + 1| = |-8| = 8

4(4) = 4x4 = 16

Now you have 8-16 = -8

The answer is -8

Answer:

Step-by-step explanation:

3473 8209ewu8wpwads =a d=waduwa sd a-= dwausS-d wa-sd was-d-aaa-d w=a dwa98-dhs;odwa s7dwa=w=da=da-dad-a w8ahspd-wasd wa-d 8-wasdwaf 0rgk9r8f

Answer:

18 x 421 = 7578

Step-by-step explanation:

421 x 18 = 7578

Answer:

11 minutes and 15 seconds (11.25 minutes/ 11 and 1/4)

Step-by-step explanation:

create the corresponding ratio by dividing 200 by 15, 200 calories per 15 minutes. Which equates to 40 calories every three minutes which means 40/3 or 13 1/3 calories every minute. You can verify this by multiplying 15 and 40/3 to get 200 again.

The last step is to divide the calories burned by the corresponding ratio (40/3)

150/(40/3) = 11.25

and .25 or 1/4 of 60 seconds(in a minute) is 15 since 60/4 = 15.

Answer:

$12.55 per CD

Step-by-step explanation:

If each CD is of equal price, you must then divide the price by the number of CD's. (75.30/6=12.55)

Answer:

$75.30/6 = $12.55 per CD

Step-by-step explanation:

Since the CDs are equally-priced, my thought is that you would divided the quantity that you purchased by your total to get your answer. So, your total, $75.30 divided by, the amount of CDs purchased, 6. This would lead you to the answer $12.55, which is the cost of each CD. To check your answer you would multiply $12.55 by 6 to get $75.30.

Hope this helped! :D

Answer:

212.81

Step-by-step explanation:

The Hundredth is the Underlined number:

212.8 0 9. 0 is in the Hundreths place so round either up or down. In this case we round up sence 9 is bigger then 5. So you would have a new number of 212.81. Hope This Helps! Rate Brainiest!

-Aslina

Answer:

I think its -12. If you apply y2-y1/ x2-x1 to the equation.

Answer:

i belive that it might be c

Step-by-step explanation:

which is -12

Answer:

the first number is the x axis and the second is the y axis so first find the x axis and plot the first number on there then do the same to the y.

Step-by-step explanation:

Answer:

-2/15

Step-by-step explanation:

8/15-2/3

8/15-10/15

-2/15

Common Denominator

Answer:

x = 9

Step-by-step explanation:

equation:

3x + 3x + x = x + x + x + x + 27

simplify:

7x = 4x + 27

3x = 27

x = 9

Answer:

x*x +4*x-8*x -8*4

x^2+4x-8x-32

x^2-4x-32

Answer/Step-by-step explanation:

1. <ABC and <BCD are alternate interior angles. Alternate interior angles are equal, therefore, since m<ABC = 38°, then m<BCD = 38°

2. m<ECF = m<BCD (corresponding angles)

m<ECF = 38° (substitution)

3. m<DCF + m<ECF = 180° (linear pair)

m<DCF + 38° = 180° (substitution)

m<DCF = 180° - 38° (Subtraction property of equality)

m<DCF = 142°

The measure of the following angles are as follows;

∠BCD = 38°

∠ECF = 38°

∠DCF = 142°

When a transversal line cut across parallel lines, the angles form include corresponding angles, alternate angles etc.

Therefore,

∠BCD = 38 degrees(alternate angles)

∠ECF = 38 degrees(corresponding angles)

∠DCF = 180 - 38 = 142 degrees(angles on a straight line)

learn more on angles here: https://brainly.com/question/18346402

#SPJ2

Answer:

Isosceles is correct........

Answer:

isosceles triangle

Step-by-step explanation:

Since we are solving for b, you need to get it by itself. So you would divide both sides by 3a. That would leave b= -7/3a.

Hope this helps!!

Answer:

x=12 a and y=2

Step-by-step explanation:

Answer: uhh

Step-by-step explanation:

I really don’t know how to do it.

Answer: D. (0, 1)

Step-by-step explanation: y - intercept is when x = 0. Anything to the power of 0 is 1. So, it would be D. (0, 1)

Answer:

If you can only pick one option I'd choose D.)

Step-by-step explanation:

Option D is only two numbers away from 456,700

The second closest number would be option B.)

Answer:

[tex]D) . \: 456,698 = 456,700 \: to \: the \: hundreds \: place.[/tex]