Luna and ginny each cast magic spells. the ratio of
spells luna casts to spells ginny casts is represented in
the tape diagram
luna-4
ginny-5
based on the ratio, what is the number of spells
ginny casts when luna casts 20 spells?
spells

The number of spells  Ginny casts when Luna casts 20 spells is 25

Step-by-step explanation:

Luna and Ginny each cast magic spells.

The ratio of  spells Luna casts to spells Ginny casts = 4:5

Let the ratio be x

So, Luna casts = 4x

Ginny casts = 5x

We are supposed to find what is the number of spells  Ginny casts when Luna casts 20 spells

So, 4x=20

Ginny casts =

Hence The number of spells  Ginny casts when Luna casts 20 spells is 25

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,