12c - 4 = 14c - 10 c = ? !!!

How much time did Cole spend painting?

Katyanochek1 [597]

1 and 11/12 hours I think

6 0

3 years ago

What’s the answer to this? I need to do this for extra credit and I have no idea what this is

sergiy2304 [10]

9514 1404 393

Answer:

20

Step-by-step explanation:

As with any evaluation problem, take it step by step according to the order of operations.

The first thing you need to do here is compute a#b.

The given definition can be simplified a bit for evaluation purposes:

a#b = a²b -ab² = ab(a -b)

Then for a=3 and b=-2, you have ...

(3)#(-2) = (3)(-2)(3 -(-2)) = -6(5) = -30

Now, you are in a position to evaluate the expression you're asked for.

$\dfrac{(a\#b)^2}{15-(a\#b)}=\dfrac{(-30)^2}{15-(-30)}=\dfrac{900}{45}=\boxed{20}$

4 0

3 years ago

What is best definition of combining like terms

Bond [772]

They are terms that contain the same variables raised to the same power. Only the numerical coefficients are different. In an expression, only like terms can be combined. We combine like terms to shorten and simplify algebraic expressions, so we can work with them more easily.

8 0

3 years ago

A regular octagon rotates 360° about its center. How many times does the image of the octagon coincide with the preimage during

Anuta_ua [19.1K]

This regular polygon, having eight sides and 45º angle in similar parts, when rotating 360º, will find a similar image and a similar angle of 45º, therefore dividing the angle of 360º by 45º will be the Number of coincidences in image.

Solving, thus, we have:
 $\frac{360}{45} = \boxed{\boxed{8\:coincidences\:in\:image}}\end{array}}\qquad\quad\checkmark$

4 0

3 years ago

Read 2 more answers

If 2^n + 1 is an odd prime for some integer n, prove that n is a power of 2. (H

vovikov84 [41]

Step-by-step explanation:

We will prove by contradiction. Assume that $2^n + 1$ is an odd prime but n is not a power of 2. Then, there exists an odd prime number p such that $p\mid n$ . Then, for some integer $k\geq 1$ ,