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RSB [31]
2 years ago
12

To get a final grade of B, a student must have an average mark on five tests that is greater than or equal to 80 and less than 9

0.
If Lisa's grades on the first four tests were 97, 93, 78 and 87, solve for the range of grades x that she could score on the fifth test that would result in her getting a final grade of B.

Give your answer as an inequality.
Mathematics
2 answers:
yulyashka [42]2 years ago
8 0

Answer:

Lisa must get an 88.75 or higher to stay in between 80 and 90.

Step-by-step explanation:

leva [86]2 years ago
3 0
Lisa needs 88.75 for her final grade
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Answer:

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Step-by-step explanation:

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8. A carpenter cut the top section of a window frame with a 37 degree angle on each end. The side pieces each have 50 degree ang
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Answer:

I will assume that the end of the top section if it were cut at 0 degrees would be cut at right angles to the length of the section.  

Joining a top section with a 37 degree end angle to a side piece with a 50 degree end angle will result in the length of the side piece being at an angle of  

37 + 50 = 87 degrees to each other.  

The same will be true for the other side.  

If the sides were parallel, then going up one side, across the top and then down the other side will result in a change of direction of 180 degrees. However, in this frame the direction turns 87 degrees at the first top corner and another 87 degrees at the second top corner. This is a total of  

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The two sides diverge at an angle of  

180 - 174 = 6 degrees from each other as they extend downwards from the top of the frame

Step-by-step explanation:

4 0
3 years ago
Suppose that the commuting time on a particular train is uniformly distributed between 42 and 52 minutes. Bold a. What is the pr
nikdorinn [45]

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Step-by-step explanation:

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Thus, the required probability :-

P(X

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2 years ago
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Step-by-step explanation:

Given line is 6x+3y=15

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let slope of the line perpendicular to the given line be m'.

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