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ira [324]
3 years ago
13

Simplify: (−2a2b) • (4a5b2) please can someone help!

Mathematics
1 answer:
xz_007 [3.2K]3 years ago
5 0
Hey there hope this helps you out

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The Lewis family and the Perry family each used their sprinklers last summer. The water output rate for the Lewis family's sprin
Rashid [163]

The Lewis family and the Perry family each used their sprinklers last summer. The water output rate for the Lewis family's sprinkler was 15 L per hour. The water output rate for the Perry family's sprinkler was 40 L per hour. The families used their sprinklers for a combined total of 65 hours, resulting in a total water output of 1850 L . How long was each sprinkler used

Answer:

Hours of use of sprinkler by Lewis family is 30 hours.

Hours of use of sprinkler by Perry family is 35 hours.

Step-by-step explanation:

Let W = hours of use by Lewis family

65 - W = hours of use by Perry family

Then;

15W + 40*(65 - W) = 1850

15W + 2600 - 40W = 1850

(15 - 40)W = 1850 - 2600

-25W = −750

W = 750/25 = 30

Therefore;

W = 30

65 - W = 65 - 30 = 35

Hence,

Hours of use by Lewis family is 30 hours.

Hours of use by Perry family is 35 hours.

3 0
3 years ago
How much is a meter in 200 feets
jarptica [38.1K]

Answer:

656.168

Step-by-step explanation:

****1 meter is 3.28084 feet*****

3.28084 x 200

answer!!!!! = 656.168

5 0
3 years ago
Read 2 more answers
20. A frock is marked Rs. 228 at a discount of 20% is given on it. What is the discount and
Darina [25.2K]

Answer and step-by-step explanation:

20. Because the discount is 20% of the given price so the discount would be"

228/100*20

= 45.6 Rs

Its selling price would be:

228 + 45.6 = 273.6 Rs

21. Sales tax would be:

450/100*5

= 22.5 Rs

Total price in bill = 22.5 + 450 = 472.5 Rs

22. 10% tax of 3300 would be:

3300/100*10 = 330 Rs

Price before tax = 3300 - 330 = 2970 Rs

23. He spent in total of:

2500 + 500 = 3000Rs

He sold for 3300 Rs

He gain 3300 - 3000 = 300 Rs profit

His loss gain percent = 3300/3000 * 100 = 110%

24. On the first bike, he earn:

2500/100*20 = 500 Rs

On the second bike, he lose:

2500/100*25 = 625 Rs

He lose in total of 625 -500 = 125 Rs

his loss percentage = (2500+500) + (2500 - 625) / 5000* 100

= 100% - (2500+500) + (2500 - 625) / 5000* 100

= 100% - 97.5%

He lose 2.5% money

Hope this helped :3

5 0
3 years ago
– Jack can paint a room in 9 hours alone. If Sara helps, they can do the job in 5 hours. How long
Dafna11 [192]

Answer: 9

Step-by-step explanation:

If Jack can paint the room in 9 hours by his self she can only do the same

8 0
3 years ago
Simplify the expression. 6w+8−4w−1
IrinaVladis [17]
Combine like terms
6w - 4w and 8 - 1
Final answer: 2w - 7
4 0
2 years ago
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