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Arlecino [84]
3 years ago
8

Heather has the following averages in her math class:

Mathematics
1 answer:
zmey [24]3 years ago
3 0

Answer:

94

Step-by-step explanation:

multiply the averages by their weighted percentage

x = final exam

88(.2) + 84(.2) + 92(.4) + x(.2) = 90

solve for x

x(.2) = 90 - 71.2 = 18.8

divide both sides by 0.2

x = 94

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Sarah drives her car 133 miles in 285 minutes. What is her average speed in miles per hour?
borishaifa [10]

Answer:

28 miles per hour

Step-by-step explanation:

133 miles/285 minutes = 133 miles/4.75 hours = 28 miles/hour

4 0
2 years ago
The owners added a second floor to the house. The second floor is 50 feet long and 30 feet wide with ceilings that are 9 feet ta
Brrunno [24]

Answer:

43100

Step-by-step explanation:

A rectangular one-story house covers an area of 3,700 square feet. The ceilings are 8 feet high. The owners add a second floor to the house. The second floor is 50 feet long and 30 feet wide with ceilings that are 9 feet high. What is the total volume of the interior of the house?

Volume = length x width x height

or volume =  area x height

Volume of the one- storey  = 3700 x 8 = 29600 square feet

Volume of the second floor = 50 x 30 x 9 = 13500 square feet

volume of interior = 29600 + 13500 = 43100 square feet

7 0
3 years ago
Hihi please solve ( will mark brainliest ❥ )
Maksim231197 [3]

Answer:

use calculator and then solve it╮(─▽─)╭

5 0
2 years ago
# 1) 22 students are __% of 55 * Show Work *
LenaWriter [7]

22 = p* 55

divide by 55

22/55 = p

.4 = p

40 percent


24 = .40 * m

divide by .40

24/.4 = m

60 = m

60 marbles


5 0
3 years ago
Read 2 more answers
What does it mean when they say what is the mean of a data set?
astra-53 [7]

Answer:

the mean of a set is the average of the numbers in that set. How you get the mean is you add up all the numbers then you divide by how many numbers are in the set.

Step-by-step explanation:

example is 1,2,3,4,5,6,7

the mean of this set is 4

3 0
3 years ago
Read 2 more answers
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