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3 years ago

PLEASE HELP 100 POINTS!!!

Mathematics

2 answers:

Ainat [17]3 years ago

5 0

Answer:

1) Simplify

2) Subtraction Property of Equality

3) Division Property of Equality

4) Symmetric Property of Equality

Step-by-step explanation:

Just took the test hope this helps :)

pshichka [43]3 years ago

4 0

Answer:

see below

Step-by-step explanation:

1) Combine like terms or simplify

2) Subtraction Property of Equality

3) Division Property of Equality

4) Symmetric Property of Equality

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The manager of a store orders model railroad sets that cost $390 and sells them for $429. What is the mark-up, as a percentage?

Katarina [22]

Answer:

10%

Step-by-step explanation:

We have been given that the manager of a store orders model railroad sets that cost $390 and sells them for $429.

We will use markup % formula for our given problem.

$\text{Markup percentage}=\frac{\text{Selling price- Cost}}{\text{Cost}}\times 100$

$\text{Markup percentage}=\frac{429-390}{390}\times 100$

$\text{Markup percentage}=\frac{39}{390}\times 100$

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Therefore, markup is 10% of cost.

4 0

3 years ago

Can y'all please help.

sattari [20]

Answer:

See explanation

Step-by-step explanation:

<u>Step 1.</u> Substitute for d to solve for n:

From the first equation:

$d=70-n$

Then substitute it into the second equation:

$0.1(70-n)+0.05n=5.5\\ \\7-0.1n+0.05n=5.5\\ \\7+(-0.05n)=5.5\\ \\-0.05n=5.5-7=-1.5\\ \\n=\dfrac{-1.5}{-0.05}=30$

<u>Step 2:</u> Substitute for n to solve for d:

$d+n=70\\ \\d+30=70\\ \\d=70-30=40$

There are 40 dimes and 30 nikels in the piggy bank

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3 years ago