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aleksley [76]
3 years ago
7

When subtracting, change the subtraction you addition and _____ the sign of the number being taken away

Mathematics
1 answer:
BabaBlast [244]3 years ago
8 0
Subtract. it from when you do good school
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Georgina works on the 30 floor she took an elevator to the 7 floor how many floors did she travel
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Georgina walk 23 floor
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What values of x make the equation x^2 - 18x + 81 = 0 true?
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X-9=0

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You invest an initial $1,000 in an account that has an annual interest rate of 2%, compounded quarterly. How much money will you
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3 years ago
Warren brought $41.50 to the art supply store. He bought a brush, a sketchbook, and a paint set. The brush was 1 6 as much as th
melomori [17]

Answer:

Warren paid $2.5 for the brush, $15 for the sketchbook and $20 for the paint set.

Step-by-step explanation:

If Warren went to the store with $41.5 and left with only $4 then the total amount he spent on the store was:

total spent = 41.5 - 4 = 37.5

Since he bought a brush, a sketchbook and a paint set we have:

brush + sketchbook + paint = 37.5

The prices of each item are related in the following manner:

brush = (1/6)*sketchbook

sketchbook = (3/4)*paint

brush = (1/6)*(3/4)*paint = (3/24)*paint = (1/8)*paint

Using these expressions on the one that represents the total value we will be abble to have only one variable, paint. We have:

(1/8)*paint + (3/4)*paint + paint = 37.5

(1/8)*paint + (6/8)*paint + (8/8)*paint = 37.5

(15/8)*paint = 37.5

paint = 37.5/(15/8) = 37.5*(8/15) = 20

brush = (1/8)*paint = (1/8)*20 = 2.5

sketchbook = (3/4)*paint = (3/4)*20 = 15

Warren paid $2.5 for the brush, $15 for the sketchbook and $20 for the paint set.

6 0
3 years ago
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One eight of Tony's books are mystery books. He has 3 mystery books. How many books does tony have in all?
Leviafan [203]
Tony has 24 books in total because if 1/8 of the books are mystery and there are 8 mystery books you have to multiple the denominator by the amount of mystery books (8*3=24). 
8 0
3 years ago
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