Answer:
120 x 4 = 480
Step-by-step explanation:
The equation would be 120 x 4 because it's 1/4 out of the whole sum. So 120 x 4 = 480.
Answer: 80 questions
Step-by-step explanation:
To solve this, we need to know how percentage works. Percentage is used to express the ratio or proportion from one value to a second value used as a reference or maximun.
When expressing a percentage the maximun used for the percentage is 100. This is why 100% is used as a ideal ratio. See the following.
100% = 100/100
100% = 1
100/100 would mean the maximun value posible in the mayority of cases. So when expresing a number in percentage, 20% por example, is would mean:
20% = 20/100
20% = 1/5
Which give us a fifth of the total. Applying this to the problem, answering 16 questions would be equal to answering one fifth of the examen. To know how much questions there is on the total examen we need to know the following.
100% = 5 * 20%
So, changing values:
100% = 5 * 16 questions
100% = 80 questions
Answer: a
Step-by-step explanation:
So XY is a quarter of the circumference, that means the other part is 3/4
circumference is 2pir which is 20pi
20pi x 3/4 = 15 pi m
Answer:
B. -7 and 17
Explanation:
Plug in the given number for x.
f(3)=4(3)+5
=12+5
=17
f(-3)=4(-3)+5
=-12+5
= -7
Answer:
36$
Step-by-step explanation:
