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Anna [14]
4 years ago
5

Given the Arithmetic sequence A1,A2,A3,A4 61, 74, 87, 100 What is the value of A15?

Mathematics
1 answer:
Rufina [12.5K]4 years ago
4 0
A15=243
74-61=13
87-61=13
So they're adding 13 every time.
A15 is 11 terms from A4 which is the last one you are given so 11*13=143
143+100=243

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The number a exceeds the number b by 50 percent. By what percent is the number b smaller than the number a?
inna [77]

Answer:

   33 1/3 percent smaller

Step-by-step explanation:


The number a exceeds the number b by 50 percent.

a = b + b*.5

a = b(1.5)

Divide by 1.5

a/1.5 = b

2/3a =b



We want to find (a-b)/a  to find the percent decrease

                           (a-2/3a)/a *100percent

                             (1/3a)/a* 100 percent

                                  1/3 * 100 percent

                                     33 1/3 percent smaller

5 0
3 years ago
A large pump can drain an 80,000 gallon pool in 3 hours. With a smaller pump also operating, the job only takes 2 hours. How lon
jekas [21]
We know that

<span>A large pump can drain an 80,000 gallon pool------------>  in 3 hours
 X gallons---------------------------------------------------------> in 2 hour
X=2*80000/3----------> 53333.33 gallons in 2 hour

therefore
</span><span>the smaller pump in two hours drain an [80000-53333.33]=26666.67 gallons
</span><span>
if the </span>smaller pump drain 26666.67 gallons-----------------> in 2 hours
<span> 80000 gallons------------------------------------------------> X
X=80000*2/26666.67------> 6 hours

the answer is 
</span><span>the smaller pump to drain the pool by itself would take 6 hours</span><span>
</span><span>
</span>
7 0
3 years ago
Pls can somebody help me ??? Is due today
Inga [223]

Answer:

I think $190,7 cause you have to find the percentages of the taxes and handling fee then add it to her accurate price.

5 0
3 years ago
Read 2 more answers
A window box shaped like a rectangular prism has a length of 12 feet, a width of 9 feet, and a height of 9 feet. If one bag cont
german

Answer:

Number of bags required = 486

Total cost to fill the window box = $2415.42.

Step-by-step explanation:

Volume of the rectangular prism = l × b × h

= 12 × 9  × 9 cubic feet

Volume of 1 bag of soil = 2 cubic feet

Number of bags required = \frac{12(9)(9)}{2}

= 486

Cost of one bag = $4.97

Cost of 486 bags = 486 × 4.97 = 2415.42

Hence, total cost of filling the window box = 2415.42.

6 0
3 years ago
What is the slope of the line that passes through the points (-9, 5)(−9,5) and (-17, 5) ?(−17,5)? Write your answer in simplest
Advocard [28]

Answer:

0

Step-by-step explanation:

The slope is the difference in y values / difference in x values of the points.

For (-9, 5), and (-17, 5) slope is zero because the y-coordinates are the same.

m= (5-5)/ (-17- -9) = 0/ 8 = 0

The line has the slope 0 so is a horizontal line

4 0
2 years ago
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