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kaheart [24]
3 years ago
14

Can someone please help me with this

Mathematics
1 answer:
Ludmilka [50]3 years ago
7 0

Answer:

-21

Step-by-step explanation: a negative times a positive will always be a negative

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Mrs Dang drove her daughter to school at the average speed of 45 miles per hour. She returned home by the same route at the aver
drek231 [11]

Answer: Time it took her to get to the school is 0.6 hours

The distance of the school from their home is 27 miles

Step-by-step explanation:

Mrs Dang drove her daughter to school at the average speed of 45 miles per hour.

Let x miles = distance from the school to their home.

Distance = speed × time

Time = distance / speed

Time used in going to school will be

x/45

She returned home by the same route. This means that distance back home is also x miles.

She returned at an average speed of 30 miles per hour.

Time used in returning home from school will be x/30

x/45

If the trip took one half hour, then the time spent in going to school and the time spent in returning is 1 1/2 hours = 1.5 hours. Therefore

x/30 + x/45 = 1.5

(15x + 10x) /450 = 1.5

15x + 10x = 450 × 1.5 = 675

25x = 675

x = 675/25 = 27

Time it took her to get to the school will be x/45

= 27/45 = 0.6 hours

8 0
3 years ago
Can someone can help me plssssssss
mario62 [17]

Answer:

Rectangle

Step-by-step explanation:

Because the floor is made of floor

5 0
3 years ago
Evaluate 7r- 15/8 when r=3 and s=5
HACTEHA [7]

Answer:

Which is equal to 18.

Step-by-step explanation:

7(3) - 15/(5). 7 x 3 is equal to 21, 15/5 is equal to 3. you are now left with 21-  3,

6 0
4 years ago
Use the number line above to correctly compare the following numbers.
tatyana61 [14]

Answer:

C

Step-by-step explanation:

9/4= 2.25

PIE=3.14

The square root of 12.96= 3.6

so the only answer that could be correct is C because 9/4 is bigger than PIE

3 0
3 years ago
57 percent of 109 please answer my question
fredd [130]
You can do 109 divide by 100 then multiply it by the percent you need 109/100= 1.09*57=62.13
5 0
3 years ago
Read 2 more answers
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