Answer:
r = 1
Step-by-step explanation:
we know that :

Then

Then

Then
5×12 = 4×(16-r)
Then
60 = 64 - 4r
Then
4r = 64 - 60
Then
4r = 4
Then
r = 1
Ok so the answer is super simple, its A
Answer:
Step-by-step explanation:
you anwser is going to be 1/8
Answer:
He needs 92 on his last test.
Step-by-step explanation:
Mean score:
The mean is the sum of all scores divided by the number of tests.
In this question:
Scores of 85, 89, 85, 89 and x(the last one).
5 tests.
We want a mean of 88. So we find x for a mean of 88.



He needs 92 on his last test.
Answer:
Think simple.
angle 1 and the angle with the measurement of 110° are subplementary angles, therefore:
∠1 + 110° = 180°
∠1 = 180° - 110° = 70°