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MAXImum [283]
4 years ago
13

Which property justifies that 42 - 37= 42-30+42-7?​

Mathematics
2 answers:
Sladkaya [172]4 years ago
7 0

Answer: distributive property

Step-by-step explanation: This answer may not be right but you never know!

Arada [10]4 years ago
4 0

Answer:

i think it is 54

Step-by-step explanation:

You might be interested in
I need to know how to multiply 2/9×5/7
lord [1]

Answer: 10/63

Step-by-step explanation: To multiply fractions, you just time's the top numbers and then the bottom numbers by themselves.

For instance: 2 x 5 = 10

                       9 x 7 = 63

and there is your answer.

:)

4 0
3 years ago
Solve for n: -1/2 (n + 8) +3/4
vlabodo [156]

\frac{1}{2} (n+8) + \frac{3}{4}

\frac{1(n+8)}{2}  +  \frac{3}{4}

\frac{n+8}{2}  +  \frac{3}{4}

\frac{2(n+8)}{4}  + \frac{3}{4}

\frac{2(n+8) + 3}{4}

\frac{2n + 16 +3}{4}

\frac{2n + 19}{4}

7 0
2 years ago
McKenna and Lara work for their uncle Eddie who repairs skateboards and bicycles. Uncle Eddie is leaving for a vacation to the A
natali 33 [55]

Let x be a number of skateboards and y be the number of bicycles in Eddie's repair shop.

Eddie asks the girls to order 54 new wheels for 21 skateboards and bicycles, then

x+y=21.

One scateboard has 4 wheels, then x scateboards have 4x wheels, one bicycle has 2 wheels, then y bicycles have 2y wheels. In total there should be ordered 54 wheels, so

4x+2y=54.

Solve the system of equations:

\left\{\begin{array}{l}x+y=21\\4x+2y=54.\end{array}\right.

From the first equation x=21-y. Substitute it into the second equation:

4(21-y)+2y=54,\\ \\84-4y+2y=54,\\ \\-2y=54-84,\\ \\-2y=-30,\\ \\2y=30,\\ \\y=15.

Then

x=21-15=6.

Answer: 6 scateboards and 15 bicycles.

8 0
3 years ago
There are 10 children in a class and 2 of them choose to read a books so what is the probability that a randomly selected presch
kiruha [24]

Answer: a 20% chance

Step-by-step explanation:

All you need to do is 2/10 = .2 = 20%

We do this because if 2 chose to read and there are 10 kids.

8 0
3 years ago
Using the results from parts D through G, write an expression that represents the number of years elapsed between the disappeara
nlexa [21]

The mathematical expression to represent the number of years elapsed since the disappearance of Helike until the end of the American Civil War is:

  • T (years from Helike's disappearance to the end of the Civil War) = w + 373

To reach this conclusion we had to search for additional information and found that the year of the disappearance of the Greek city of Helike is -⅕ times the year the American Civil War ended.

  • Helike's disappearance year = (-w / 5)

According to the previous expression, the year of Helike's disappearance is:

  • Helike's disappearance year = (-1865/5) = -373

According to the previous data, it can be inferred that the expression that represents the number of years elapsed between the disappearance of the Greek city of Helike and the end of the US Civil War is:

  • T = w + 373
  • T = 1865 + 373
  • T = 2238

Note: This question is incomplete because the is some information missing. However, I can answer it based on my prior knowledge.

Learn more about Civil War in: brainly.com/question/14234520

3 0
3 years ago
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