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Oduvanchick [21]
2 years ago
14

Spencer can do a piece of work in 20 days and Toby in 25 days. They began to work together.

Mathematics
1 answer:
Verdich [7]2 years ago
8 0

I believe the answer is that Spencer left after 9 days.

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70 decreased by 13% =
Pie
If you have a calculator: 
<span>1) To find 1%, divide by 100 (70 / 100 = 0.7) </span>

<span>2) Then, multiply by the % you need (0.7 x 13 = 9.1) </span>

<span>Therefore 70 - 9.1 = 60.9 </span>

<span>If you don't have a calculator: </span>
<span>1) Find 50%, 10%, 5%, and 1%. With these, you can make any % you need. </span>
<span>50% = X / 2 (= 35) </span>
<span>10% = X / 10 (= 7) </span>
<span>5% = first, do 10%, then divide that by 2 (= 3.5) </span>
<span>1% = X / 100 (= 0.7) </span>
<span>Where X is the number you want to work out % for </span>

<span>2) Add those % up to get the amount you want </span>
<span>10% + 1% + 1% +1% = 13% </span>
<span>7 + 0.7 + 0.7 + 0.7 = 9.1 </span>

<span>Therefore 70 - 9.1 = 60.9
Hope that helps :)</span>
7 0
3 years ago
The scatter plot below shows the algebra grades and the number of absences of different students for the first semester. Which o
swat32

Answer:

Look up on youtbe

Step-by-step explanation:

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in how many ways of the permutations of 10 different things taken 4 at a time will one particular thing always occur​
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Answer:

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which one of the following is square of 4

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What is equinlents to (3-2x)(4x-7)
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-8x^2+26x-21

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If one side of a rectangle is increased by 12 and an adjacent side is decreased by 3 a rectangle is formed whose perimeter is 64
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The length of the side of the original square is 7cm

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