The three scores are 86, 74, and an unknown score x. The average (i.e. the sum divided by how many there are) is 80, so we have
Multiply both sides by 3 and you get
Subtract 160 from both sides to get
Note: you could solve this exercise very quickly if you notice that the two numbers, 86 and 74, are symmetrical with respect to 80, which is the average. So, the third number must be the average.
Answer:
8.25 feet
Step-by-step explanation:
to find the width, you divide the area by the length
103 1/8 / 12 1/2 = 8.25
Give brainliest, please!
Hope this helps :)
(a-b)(a+b) because when you reverse the sum you do axa and ax-b xx
Answer:
x = 30
Step-by-step explanation:
1/2(x+6) = 18
Distribute
1/2 x + 3 = 18
Subtract 3 from each side
1/2x +3-3 = 18-3
1/2x = 15
Multiply each side by 2
1/2x*2 = 15*2
x = 30
Answer:
C.
Step-by-step explanation:
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