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4 years ago

Simplify : 4(-7c+5d)+5-2(5+9d)

Mathematics

1 answer:

Travka [436]4 years ago

6 0

Step-by-step explanation:

use -2 to open d bracket

4(-7c+5d)+5-10-18d

use 4 to open d bracket

-28c+20d+5-10-18d

re arrange

-28c+20d-18d+5-10

-28c+2d-5

note: - doesnt start an equation so rearrange

=+2d-28c-5

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3 years ago

Which expressions are equivalent to 6g-18h6g−18h6, g, minus, 18, h?

vredina [299]

Answer:

3(2g-6h)

-2(-3g+9h)

Step-by-step explanation:

We have given the expression:

6g-18h

There are two expression which are equivalent to 6g-18h

Write down the expression first:

6g-18h

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3(2g-6h)

This expression is equivalent to 6g-18h

Then,

6g-18h

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-2(-3g+9h)

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3 years ago

Rick buys remote control cars to resell. He applies a markup of 21%. Enter two expressions that represent the retail price of th

11111nata11111 [884]

The two expressions that represent the retail price of cars is: Retail price = 1.21c and Retail price = c + 0.21c

<em><u>Solution:</u></em>

Given that,

Rick buys remote control cars to resell

He applies a markup of 21%

Let "c" be the original price of remote control cars

To find: Expression for retail price of car

We know that,

Retail price = original price + markup

Here, markup price = 21 % of original price

Markup price = 21 % of c

Therefore, substituting the given values we get,

Retail price = c + 21 % of c

$\text{ Retail price } = c + 21 \% \times c\\\\\text{ Retail price } = c + \frac{21}{100} \times c\\\\\text{ Retail price } = c + 0.21c\\\\$

This can also be expressed as,

$\text{ Retail price } = c + 0.21c = 1.21c$

Thus two expressions that represent the retail price of cars is: Retail price = 1.21c and Retail price = c + 0.21c

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3 years ago