The student would have to score 100% on their next test to brung their average up to 90. Here is why;
90+84+86=260
(260+?)/4=90
(260+100)/4=90
360/4=90
This is done to get the mean (or average) of a group of numbers by adding all the numbers and dividing by the amount of numbers you added together. Here it is divided by 4 because of the three tests he has taken and the test he will take.
Answer:
7680
Step-by-step explanation:
(64)2 = 128
128 x 60 = 7680
Answer:
y=4
Step-by-step explanation:
4x5=20
20-3=17
y=4
Answer:
Step-by-step explanation:
You could do 9x < 3 kinda like fractions. Hope this helps?