Abeka 9th grade Algebra test 1

The sum of n and 8 is divided by 3.

(n+8)÷3

What is the opposite of 12?

-12

one fourth of r multiplied by x squared is equal to 7

1/4rx²=7

How many terms are in the expression 2x-5a/7n

2

A piece of yarn 29 inches long is cut into two parts. If one of the pieces is m inches long, represent the length of the other piece.

29-m

[2+9 x(3-8)]÷8+4 what do you do first?

3-8

8n-7r⁵ what is the exponent?

5

8n²-12 what is the coefficient?

8

The circumference C of a circle is equal to the product of π and the diameter d.

C=πd

The gross profit GP of an item equals the selling price P minus the cost of 2 dollars for producing the item.

GP=p-2

The perimeter of a rectangle is twice the sum of its length l and width w.

P=2(l+w)

What is a number's distance from zero called?

absolute zero

x+(y+z)=(x+y)+z

associative

r(s+t)=(s+t)r

commutative

(a+b)c=ac+bc

distributive property

3/5(2/2)=3/5

identity

3x+0=3x

identity

What type of number is √23 (square root of 23)

irrational

The length l of a rectangle is equal to its area A divided by its width W.

l=a/w

When you MULTIPLY two signed numbers with opposite signs, the product is always __

negative

What are quantities combined by only addition or subtraction?

terms

What is an unknown value called?

variable

What do we call natural numbers and zero?

whole numbers