After taking 9 tests, Carol's average grade in her Italian class is 90. Her teacher drops the lowest of
the 9 test scores to determine the final grade. If
Carol's final grade is 91, what was her lowest test
score?

82

Step-by-step explanation:

Given

Average in 9 tests = 90

Average when lowest score is removed = 91

Required

Find the lowest test score

Average or Mean is calculated as thus;

Where is the sum of test scores

n = number of tests

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When the smallest scores is removed; n = 9 - 1 = 8 and average = 91

becomes

Multiply both sides by 8

This means that Carol's test score in 8 subjects is 728

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Considering all 9 subjects

Let the 9th subject represent the subject Carol had the least score

n = 9

Average = 90

= 728 + the 9th subject

becomes

Multiply both sides by 9

Subtract 728 from both sides

Hence, Carol lowest test score was 82

d

step-by-step explanation:

a. turk and mcalister

b. howard, mission, and market

c. yes. since streets end some do not cross yet are not parallel to others. example: mcalister and 5th

step-by-step explanation:

parallel lines are lines which do not intersect ever and look a lot like railroad tracks. turk, mcalister and golden gate are examples of these.

intersect are streets which cross each other and a car on one can reach the other. howard, mission, and market intersect with 6th.

skew lines are lines which neither intersect nor are parallel. these lines exist here because some streets end and never intersect another like mcalister and 5th.