91Ó°ÊÓ

Describe a real-life problem that can be solved using the equation $50x=400$. Then solve the problem.

Summer Job: During the summer, you work 4 hours each day as a cashier and earn $8 each hour. Use properties of multiplication to find how much money you earn during a 5 day work week.

Solve the equation. Check your solution.

$-5=-17+y+8$

Solve the equation.

$\mathbf{c}\mathbf{-}\mathbf{2}\mathbf{.}\mathbf{59}\mathbf{=}\mathbf{1}\mathbf{.}\mathbf{48}$

Baseball A baseball player’s batting average is defined by the verbal model below. During the 2007 Major League Baseball season, Ichiro Suzuki of the Seattle Mariners batted 678 times and had a batting average of .351. How many hits did Suzuki have?

Dinosaurs Scientists believe that the heaviest dinosaur was Argentinosaurus, which weighed about 110 tons. Use a conversion factor to find the weight of Argentinosaurus in pounds.

Solve the equation. Check your solution.

$\mathbf{9}\mathbf{=}\frac{\mathbf{c}}{\mathbf{-}\mathbf{9}}$

Challenge You want to stock your aquarium with three types of fish: angelfish, swordtails, and tetras. Each angelfish costs \(5, each swordtail costs \)2, and each tetra costs $3. You plan to buy 20 fish.

a. Let a be the number of angelfish and s be the number of swordtails you buy. In terms of a and s, how many tetras do you buy?

b. Write and simplify an expression in terms of a and s for the total cost of your fish.

c. Of the 20 fish you buy, 4 are angelfish and 10 are swordtails. Use your expression from part (b) to find your total cost.

Find the value of x for the given triangle or rectangle

Perimeter 34 in.

Lightning On July 1, 2001, a Pennsylvania weather station detected an average of 80 lightning strikes per minute over a 24 hour period. Find the total number of lightning strikes detected during that time.