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lara31 [8.8K]
3 years ago
13

Solve for the unknown variable "x" in the following linea equation: 2 ( 2x + 20) = 80 X =

Mathematics
1 answer:
Stella [2.4K]3 years ago
4 0

Step-by-step explanation:

2(2+20)=80

4+40=80 (Distribute)

4+40-40=80-40(Subtract from both sides of the equation)

4=40(Simplify)

4/4=404/4(Divide both sides of the equation by the same term to get x=10)

=10

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The weight of a nickel is 80% of a quarter. If a nickel weighs 5 grams how much does a quarter weigh?
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Answer:

Weight of a quarter  = 6.25 grams

Weight of a dime  = 2.5 grams

Step-by-step explanation:

The weight of a nickel is  80%

The weight of a quarter  or the weight of a nickel is 5 grams or weight of a quarter =50.8 = 6.25 grams

Weight of a dime = 50% = 12 (weight of nickel) = 52 = 2.5 grams

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Slope intercept form? A line passes through the point (10,4) and has a slope of -1 over 2 .
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The slope-intercept form:

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When a number is decreased by 45%, the result is 9. What is the original number to the nearest tenth?
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