Math Homework

The graph below shows the relationship between the number of pencils bought and the cost. Describe the relationship between the two variables. Use this relationship to write an equation relating the two variables.

2p=1c

There are red and blue marbles in a bowl.There are twice as many blue marbles as red marbles.What expression represents the number of blue marbles?

A. 2b,where b is the number of blue marbles

The graph below shows the relationship between the number of miles a person walks and the number of hours spent walking.What equation best describes the relationship between the two variables?

A.t=4d

The value of x is 3 more than half the value y. A. Write an expression for the value of x in terms of y. B.What is the value of x if y=7? Show your work.

A.y ÷2 +3 =x B.7÷2=3.5+3=6.5

Gloria is an artist. She sets a goal to paint 2 pieces every month. She already painted 5 pieces. The number of pieces Gloria paints depends on the number of months she spends painting. Which statements describe the number of pieces p Gloria paints over t months if sh meets her goal?

B. t is the independent variable and p is the dependent variable. C. p increases by 2 as t increases by 1

x is 4 less than a number y. What expression represents the value of x?

B. y-4

The table below shows the balance of a savings account after t weeks, where money is being withdrawn at a constant rate.Peter can find the balance of the account based on how many weeks have passed.What are the independent and dependent variables, and how do they change?

B.As the independent variable t increases by 1, the dependent variable b decreases by 50.

Joan has 3 fewer dogs than rabbits. If r is the number of rabbits Joan has, which expressions represent the total number of animals Joan has?

B.r+(r-3) D.2r-3

Kyle starts with $15.00 and saves $3.50 each day. What expression represents the total amount Kyle saves?

C.3.5t+15,where t is the number of days

A gardener is growing tomato plants.One plant starts out 5 cm tall. It grows a constant 2 cm every week.What equation represents the height h of the plant after t weeks?

D.h=2t+5

The product of two different numbers is 132. If one of the numbers is x, what expression represents the value of the other number?

D.x+132

An online bookstore is having sale. All paperback books are $6.00, with a flat fee of $2.50. Write an equation that represents the total cost c based on buying b books. Identify the independent and dependent variables and how the dependent variable changes in relation to the independent variable.

c=b $8.50=1 book b independent c dependent c increases by $8.50 as b increases by 1