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inna [77]
3 years ago
10

Which expression is equivalent to 13 - (-21) ?

Mathematics
2 answers:
kifflom [539]3 years ago
5 0
The answer is 'Choice A'
BaLLatris [955]3 years ago
4 0

Answer:

Choice A

Step-by-step explanation:

Negative times negative equals positive, is -21 would change to positive 21

Hope this helps!

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One number is one-fifth of another number. The two numbers total 18. Find the numbers
Masja [62]

Answer:

One number is 17 and the other is 85.

Step-by-step explanation:

Let the numbers be m and n.  Let m = (1/5)n.  Note that m+n = 18.

Substituting (1/5)n for m in the 2nd equation, we get (1/5)n + (5/5)n = 18.  Multiplying all three terms by 5 to remove fractions, we get n + 5 = 90, so that n = 85.  m is (1/5) of 85, or m = 17.

8 0
3 years ago
The tile along the edge of a triangular community pool needs to be replaced.
Gre4nikov [31]

Answer:

Third option: 12x^2+8x+25

Step-by-step explanation:

s1=8x^2

s2=4x^2+15

s3=8x+10

Total perimeter of the pool edge: P

P=s1+s2+s3

Replacing s1, s2 and s3 in the formula above:

P=(8x^2)+(4x^2+15)+(8x+10)

P=8x^2+4x^2+15+8x+10

Adding like terms:

P=12x^2+8x+25

6 0
3 years ago
Read 2 more answers
3/8 + 1/4 = Tap on the pic to see wiestion
Radda [10]

Answer:

3/8 + 1/4 is 5/8 and 1/10+4/5 is 1

Step-by-step explanation:

convert 1/4 to 2/8 and add to 3/8 to get 5/8

convert 4/5 to 9/10 and add to 1/10 equals 10/10 which is also 1

6 0
3 years ago
Read 2 more answers
Employees at The Shoe Shack get a 25% discount when they buy a pair of shoes at the store. Theo wants to buy a pair of shoes wit
Burka [1]

Answer:

$12

Step-by-step explanation:

We know that 25% means 25 out of 100, which can be represented by 25/100 or 1/4.

To get the discount we multiply 48 by 1/4 which is 48/4 = $12

3 0
3 years ago
Read 2 more answers
Point A is located at (-2, -6) and is translated 4 units up. What are the coordinates of point A'?
defon

Answer:

(-2, -2)

Step-by-step explanation:

Red point represents (-2,-6) while blue point represents (-2,-2). count the numbers upward and it'll be 4 units. Best thing to do in this problem is to plot the given points and go from there.

4 0
3 years ago
Read 2 more answers
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