Algebra Expressions and Properties

Which expression represents the product of r and 4

• $\frac{4}{r}$

• $4r$

• $\frac{r}{4}$

• $r+4$

Tags

CCSS.6.EE.A.2A

Write an algebraic expression for the phrase the sum of r and twice x

• $r\ +2x$

• $x\ +2r$

• $r\ +x^2$

• $2\left(r+x\right)$

Tags

CCSS.6.EE.A.2

CCSS.6.EE.B.6

Boxes of nails are stacked on top of each other on a work bench. The table shows how the height above the floor of the topmost box depends on the number of boxes. What is the rule for height? Give the rule in words and as an algebraic expression.

• The height is the product of 39 and 9 plus number of boxes, n. The rule is 39(9+n)

• The height is the sum of 39 and 9 times the number of boxes, n. The rule is 9n + 39.

• The height is the quotient of 9 and 39 plus the number of boxes, n. The rule is
  $\frac{9}{n\ +\ 39}$
  

• The height is the product of 9 and 39 plus the number of boxes, n. The rule is 9(n + 39)

The table shows the costs associated with a ski trip. Write an expression to determine the cost of 4 children and 2 adults renting equipment for a ski trip for h hours. The equipment rental fee is for the entire family.

• $\left[4\left(15\right)\ +2\left(35\right)+6\left(10\right)\right]h$

• $\left[4\left(15\right)+2\left(35\right)+10\right]h$

• $4\left(15\right)+2\left(35\right)+10h$

• $4\left(15\right)+2\left(35\right)+6\left(10\right)h$

Simplify
 $3^2+\left(9-8\div2\right)$  

Tags

CCSS.6.EE.A.1

Simplify
 $9\div\left(-3\right)\ +4\div\left(-8\right)$  

• 3.5
  

• -3.5

• 2.5

• -2.5

Tags

CCSS.6.NS.C.5

Simplify
 $\sqrt{81}$  

• 9

• -9

• 9,-9

• 40.5

Evaluate for a = -3, b =-2
 $\frac{2a\ +\ b}{2}$  

• 4

• -4

• 7

• 3.5

Tags

CCSS.6.EE.A.2

CCSS.6.EE.B.5

CCSS.6.EE.B.6

Evaluate for given values, a = -3, b = -2, c =1
 $2a^2\ -\left(4b\ +\ c\right)$  

• 29

• 25

• 9

• 11

Tags

CCSS.6.EE.A.2C

Estimate the  $\sqrt{94}$  to the nearest integer.

• 47

• 24

• 9

• 10