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3 years ago

Answer al 4 question and I’ll give your Brainly

Mathematics

1 answer:

miv72 [106K]3 years ago

6 0

Answer:

C-C-B-D

Step-by-step explanation:

Hope this helps and look out for people trying to take your points!

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patty is building a rope ladder for a tree house. she need two 5-foot pieces of rope the sides of the ladder.she needs 7 pieces

klio [65]

The answer is 136 because 7 x 18 is 126 then + 10 is 136

5 0

3 years ago

Tell whether the ratios form a proportion.<br><br> 2/5,40/16

lisabon 2012 [21]

Answer:

No, those ratios are not proportional.

Step-by-step explanation:

The reason for them not being proportional is because 2/5 is already in its simplest form and 40/16 in its simplest form is 5/2, resulting in them not being equivalent meaning that they are not proportional.

5 0

3 years ago

Find the difference. Write your answer in standard form.

vredina [299]

Answer:

7x² - 6x + 4

Step-by-step explanation:

(4x² - x + 6) - (-3x² + 5x + 2)

4x² - x + 6 + 3x² - 5x - 2

4x² + 3x² - x - 5x + 6 - 2

7x² - 6x + 4

3 0

3 years ago

I don't understand 1 and 2

Trava [24]

1. addition
2. subtraction

8 0

4 years ago

Solve by completing the square

erastovalidia [21]

Answer:

Your answers would be:

x = 10 and x = -8

Step-by-step explanation:

Solve for the zeros:

x² - 2x - 78 = 2

Subtract both sides by 2.

x² - 2x - 80 = 0

Use the quadratic formula: $x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

a = 1

b = -2

c = -80

Plug in and solve:

$x=\frac{-(-2)\pm\sqrt{(-2)^2-4(1)(-80)}}{2(1)}\\\\x=\frac{2\pm\sqrt{(-2)^2-4(1)(-80)}}{2(1)}\\\\x=\frac{2\pm\sqrt{4-4(-80)}}{2(1)}\\\\x=\frac{2\pm\sqrt{4+320}}{2(1)}\\\\x=\frac{2\pm\sqrt{324}}{2(1)}\\\\x=\frac{2\pm18}{2}\\$

Solve for +:

$x=\frac{2+18}{2}\\\\x=\frac{20}{2}\\\\x=10$

Solve for -:

$x=\frac{2-18}{2}\\\\x=\frac{-16}{2}\\\\x=-8$

5 0

3 years ago