Answer:
Correct choice is B
Step-by-step explanation:
Let x% be your final test score, then the average of all test scores is

Since you must have an average between 80% and 89%, then

X is measured in percent, then the greatest value of x can be 100%. You get that

Answer:
Equivalent expression is 
Step-by-step explanation:
Given expression is,

First step is to apply distributive property. The property states that,

Applying the property,

Simplifying,

Collecting like terms,

Combining the like terms,

Therefore, equivalent expression is 
Answer:
20˚F - (-12˚F)
Step-by-step explanation:
Highest temperature of the week = 20˚F
Lowest temperature of the week = -12˚F
The difference between the highest and the lowest temperature actually means to subtract the lowest from the highest temperature.
The required expression is;
20˚F - (-12˚F)
So, 7h/2=28.
Multiply by 2 to get 7h=56.
Divide by 7 to get h=8.
Therefore, the height is 8.
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Answer:
72°
Step-by-step explanation:
The external angle E is half the difference of the intercepted arcs.
44° = (CD -DF)/2
88° = CD -DF
DF = CD -88° = 160° -88° = 72°