All categories

3 years ago

How is subtracting-4x from 9x similar to subtracting -4 from 9?

1 answer:

4 0

Question:

How is subtracting -4x from 9x similar to subtraction -4 from 9?

Answer:

If both of them have the same variable lets say this:

2a + 2a = 4a
Just add 2 + 2 and then keep the a later at the end since they both have the same letter.

So in this case, it will be the same as subtracting -4 from 9 because they both have the same variables so the x would stay the same:

-4x + 9x = 5x
would be the answer.

Hope this helped!

~Shane

You might be interested in

R is the midpoint of HS, N is the midpoint of RS, and RN = 5 cm. What is the length of HS

Galina-37 [17]

Answer:

Step-by-step explanation:

RN is 1/4 of HS, and 5x4=20.

3 0

2 years ago

Can someone help with number 20

enyata [817]

Answer:B: 36°

Step-by-step explanation:

We know that ∆ABC is isoceles, making (angle)<ABC and <BCA congruent because base angles of isoceles triangles are congruent.

Because we have parallel lines, we can look for alternate interior angle pairs. <BCA is congruent to <DAC because they're alternate interior angles.

If <BCA is x then so is <ABC.

Since triangles add up to 180° we can add all of the angles (3x+x+x) and set it equal to 180.

3x+x+x=180

5x=180

x=36

If we were looking for <BAC we would plug that back in and solve, but we're looking for <BCA which is equal to x, therefore m<BCA=36°

3 0

2 years ago

When the sum of the internal angles of a polygon is 10 right angles, then how many sides does it have?

Varvara68 [4.7K]

Answer:

Step-by-step explanation:

Let's say our sum is s.

s = 10 right angles

a right angle is 90 degrees

s = 10 (90)

s= 900

Given the amount of sides in a polygon (n), the sum of the interior angles is equal to

(n-2) * 180

Therefore, the sum of the interior angles is equal to

(n-2) * 180 = 900

divide both sides by 180 to help isolate n

n-2 = 5

add 2 to both sides to isolate n

n = 7

3 0

2 years ago

Hi it my birthday today and my sister told me to post myself on all social media .

Svetlanka [38]

Answer:

happy birthday to you..live long dear

8 0

2 years ago

Should you use Sine, Cosine, or Tangent to solve the following problem?

alukav5142 [94]

Answer:

<h2 />

TAN!!!!!!!!!!!! 

Soh Cah toa

4 0

2 years ago