When evaluating the expression 5x^2 for x=4 explain why 4 must be squared before multiplying by 5

Mathematics

1 answer:

fenix001 [56]2 years ago

3 0

Answer:

Order of operations

Step-by-step explanation:

4 must be squared before multiplying by 5 because of order of operations (PEMDAS). PEMDAS stands for parentheses, exponents, multiplication, division, addition, and subtraction. 4 squared is an example of an exponent and multiplying by 5 is an example of multiplication. Therefore 4 squared must come first.

When 4 is squared first, you will get an answer of 80.

When you multiply by 5 first, you will get an answer of 400.

You might be interested in

Mason currently pas $420 per month in rent. the contract on his apartment sates that his rent will increase by 6% next year.

mel-nik [20]

Answer:

a. $25.20

b. $445.20

Step-by-step explanation:

$420*(6%/100%) = $25.20

$420+$25.20 = $445.20

8 0

2 years ago

Read 2 more answers

****Brainliest to best answer!!***<br> Thank u to everyone who helps!

Dmitrij [34]

Answer:

Step-by-step explanation:

When you read the question it says that her average speed from the library to the gym is 15 mph less than her speed from her home to the library. So x - 15 is what describes that situation.

If it is A it cannot be anything else.

B is incorrect. x - 15 is not a time. It is a rate. It can be used to develop the amount of time, but by itself it is still A.

C is incorrect. Her average speed from her house to the library is x

D is incorrect. The distance is given as the same as from her home to the library as from the library to the gym. Both are 4

7 0

2 years ago

Does the area of a square vary with the side length?

Darina [25.2K]

Correct, because the area of a square = side x side = side^2

8 0

2 years ago

Write the equation of a line that is parallel to 2y=x-10 passing through (2,1)