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Roman55 [17]
3 years ago
6

Please explain step by step​

Mathematics
1 answer:
JulijaS [17]3 years ago
6 0
1. Calculate the volume of entire cube as if it was a solid rectangle:
Length x width x height=
20x16x12 = 3,940 cubic inches

2. Calculate the volume of the "missing"
Piece and subtract:
Length x width x height=
20x8x6 = 960 cubic inches
(notice you can find the height of the missing piece by subtracting 12-6)

So your answer is 3,940-960 = 2,980 cubic inches inside the steps
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Answer: 12

Step-by-step explanation:

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Collect like terms

6c - 2c = 59 - 11

4c = 48

c = 48/4

c = 12

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Miguel bought a desktop computer and a laptop computer. Before finance charges, the laptop cost $450 less than the desktop. He p
Stolb23 [73]

Answer

Find out the how much did each computer cost before finance charges .

To proof

Let us assume that the price of the desktop computer be x .

Let us assume that the price of the laptop computer be y .

As given

the laptop cost $450 less than the desktop.

than the equation is written

y = x - 450

As given

He paid for the computers using two different financing plans.

For the desktop the interest rate was 7% per year,

the laptop it was 5.5% per year.

The total finance charges for one year were $279.

7 % is written in the decimal form

=\frac{7}{100}

= 0.07

5.5 % is written in the decimalform

= \frac{5.5}{100}

=0.055

than the equation becomes

0.07x + 0.055y = 279

simplify the above

we get

70x + 55y = 279000

put y = x - 450 in the equation

we get

70x + 55 ( x - 450 ) = 279000

70x + 55x - 24750 = 279000

125x = 303750

x = \frac{3037550}{125}

x = $ 2430

put in the  y = x - 450

y = 2430- 450

y =$ 1980

Therefore the desktop cost $ 2430 before finance charge.

the laptop cost $ 1980 before finance charge.

Hence proved


3 0
3 years ago
Is the equation linear and if it is linear is it proportional?<br> y=x +31
Natasha_Volkova [10]

Answer:

yes, its linear and proportional .

Step-by-step explanation:

In mathematics, two varying quantities are said to be in a relation of proportionality, if they are multiplicatively connected to a constant, that is, when either their ratio or their product yields a constant. The value of this constant is called the coefficient of proportionality or proportionality constant.

you just have to graph it .

hope i helped :) !!! brainliest ??

7 0
3 years ago
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