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Paul [167]
3 years ago
7

If it says to evaluate an expression, does it mean to answer it?

Mathematics
2 answers:
Fed [463]3 years ago
8 0
Evaluating an expression means either to solve the expressions or to simply it.

Solving an expression:

2 - (10 + 5)

A simply expression. After doing the math the answer comes out as -3.

2x + 3x

This is an algebraic expression. This means we have variables like x and y.
 In this case, we can only simplify it. Because we don't know what x is equal to.

Because they are like terms (which means they have the variable) we can add them to together.

2x + 3x = 5x

I hope this answer clears up any misunderstandings about expressions and over all helped you learn something! If you still need some help, don't hesitate to DM on Brainly! I wish you best of luck on your journey of math!

EDIT:

Now what if you have an expression like this:

5x + 5m where x=4 and m=8

In mathematics, something like 5x is the same difference as 5 * x.
And x is just a placeholder for a number or for another variable.

And in this equation, x is equal to 4. So, we just replace x with 4.

5(4) + 5m

Same this with m. The variable m is equal to 8.

5(4) + 5(8)

We can solve!

5(4) + 5(8) = 20 + 40 = 60

Our answer is 60.
Kipish [7]3 years ago
4 0
Just to add some information to support Noah's answer.

They will ask you to evaluate the expression when they give you the number for each unknown letters. For example : let's say we have
3x + 5z + 2y
They can ask you to evaluate it for x = 2, z=4, y=3
So now all you have to do is replace the numbers to the letters they belong to. Does that make since ?


I hope this help! 
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Write the prime fractionalization of 20 from least to greatest
Andrews [41]

Answer:

1, 2, 4, 5, 10, 20

Step-by-step explanation:

they all can go into 20

6 0
3 years ago
The keyboard of a piano has 88 keys. Generate the equivalent prime factorization of 88.
Verdich [7]

Answer:

11 x 2^3 =11 x 2 x 2 x 2 = 88

Step-by-step explanation:

88

<u>11</u> 8

   <u>2</u> 4

      <u>2</u> <u>2</u>

<u />

Use a factor tree it helps a lot :0).

8 0
3 years ago
(-4s+9) + (4s-6) simplify
andrew11 [14]

Step-by-step explanation:

= ( - 4s + 9) + (4s - 6)

=  - 4s + 9 + 4s - 6

=  - 4s + 4s +9 - 6

Now subtract.....

= \boxed{\sf{3}}

hence the answer is 3 ....

hope it helped !!!!

6 0
2 years ago
0.5x + 4 + 0.9x = x + 5
Law Incorporation [45]

Answer:

x=2.5

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
AC if TC = 20q + 10q^2?
Alexus [3.1K]

Answer:

AC = (20+ 10q)

Step-by-step explanation:

Given that,

Total cost, TC = 20q + 10q²

We need to find AC i.e. average cost.

It can be solved as follows :

AC=\dfrac{TC}{q}\\\\AC=\dfrac{20q + 10q^2}{q}\\\\AC=\dfrac{q(20+ 10q)}{q}\\\\AC={(20+ 10q)}

So, the value of AC is (20+ 10q).

4 0
3 years ago
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