Out of 40 students, 2 earned an A,12 earned a B, 6 earned a C and 20 earned a D or an F. What percent of students earned B?

A jar is filled with buttons of various colors. If the jar has a total of 620 buttons and 20% of the buttons are yellow buttons are in the jar?

1) 30% 2) 124 yellow buttons

Step-by-step explanation:

1) 12 B’s out of 40 12/40= .3 x 100 = 30

2) 20%, 20/100, .2

620 x .2 = 124

38.5

step-by-step explanation:

lets say, first number = r

second number = 3r+7

total = 49

(r)+(3r+7)= 49

4r+7 = 49

4r = 42

r = 42/4

r= 10.5

3r+7 = 3(10.5)+7 = 38.5

hope this

answer: since the question is talking about growth you have to use the growth formula which is inital amount (1 + growth)^time

step-by-step explanation:

the intial amount is 1200, the growth is 4.8, and the time is 7. plug those numbers into the equation, also i think you have to change 4.8 into a percent. but, i have forgotton how to do that. if this is a online class go on to the lesson.