15) Scott is hiking in Grizzly Park. In the morning he hiked 4.5 miles. In the afternoon he hiked at a rate of 2.5 miles per hour. Which equation can be used to find y, the total distance he hiked if he hiked for x hours in the afternoon? (7.7A, RS,

RC2)

A) y = 4.5x + 2.5

C) y = 4.5x - 2.5

B) y = 2.5x + 4.5

D) y = 2.5x 4.5

Is it A, C,B, or D?

If you shift the linear parent function, f(x)=x, up 13 units, what is the equation of the new function?

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.