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sophiqdionacles1968
sophiqdionacles1968
08.02.2021 • 
Mathematics

I NEED HELP ASAP! with questions 9-18 ( Yes it might be a lot but you don't have to answer all of them! <3 ) I will give all stars, thanks, and a comment to whoever helps me the most! Question 9-

Which statement best describes the expression 3 + 2 ÷ y?

The quotient of y and the sum of 3 and 2

The quotient of the sum of 3 and 2 and y

The sum of 3 and the quotient of 2 and y

The sum of 3 and the quotient of y and 2

Question 10-

If x = 2.3, 5x = . (Input decimals only, such as 12.7.)

There no answer choices

Question 11-

What is the value of fraction 1 over 3 x3 + 5.2y when x = 3 and y = 2?

3.4

16.4

19.4

28.4

Question 12-

The expression to find the perimeter of a rectangle is 2(length + width). What is the perimeter, in units, of a rectangle of length fraction 1 over 3 unit and width fraction 1 over 2 unit?

fraction 2 over 5 unit

fraction 4 over 5 unit

fraction 1 and 1 over 3 units

fraction 1 and 2 over 3 units

Question 13-

Which of these shows 7 + 2y rewritten using the commutative property of addition?

7y + 2

2y + 7

7 − 2y

2y − 7

Question 14-

Which algebraic property is used to rewrite 2(4y + 1) as (4y + 1)(2)?

Distributive property

Associative property

Commutative property of multiplication

Commutative property of addition

Question 15-

The work of a student to find the dimensions of a rectangle of area 8 + 16x and width 4 is shown below:

Step 1: 8 + 16x

Step 2: 4(4) + 4(12x)

Step 3: 4(4 + 12x)

Step 4: Dimensions of the rectangle are 4 and 4 + 12x

In which step did the student first make an error and what is the correct step?

Step 3; 4 + (4 + 12x)

Step 3; 4 + (4 ⋅ 12x)

Step 2; 4(2) + 4(4x)

Step 2; 4(2) + 4x(2)

Question 16-

Which expression is equal to 4y?

y + 3

y2 + y2

3y + 1

y + y + y + y

Question 17-

Which expressions are equivalent to 2(2x + 4y + x − 2y)?

2(x + 6y) and 2x + 12y

2(x + 2y) and 2x + 4y

2(3x + 2y) and 6x + 4y

2(3x + 6y) and 6x + 12y

Question 18-

Which expression is equivalent to 12x − 8x + 3 and why?

3 + 4x, because (12x − 8x) + 3 = 4x + 3 = 3 + 4x

7x, because 12x − 8x + 3 = 4x + 3 = 7x

12x − 5, because 12x − (8x − 3) = 12x − 5

x, because 12x − 8x + 3 = 12x − 11x = x

Solved
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