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3 years ago

9

The price of a gallon of unleaded gas was $2.89 yesterday. Today, the price fell to $2.82 . Find the percentage decrease. Round

your answer to the nearest tenth of a percent

2 answers:

kupik [55]3 years ago

6 0

2.89 rounded is 3 2.82 rounded is 2.80 which = 2.8 you minus 3-2.8 it = 0.2

lesya [120]3 years ago

4 0

If u have $2.89 yesterday so you need to times $2.82 so I need th0 in the 10th percent so when u times

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Answer:

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1 hour: A: 30.25 B: 34.25

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3 years ago

The area of a triangle is 10 square inches and its height is 5 inches. find the base. 2 in. 4 in. 25 in.

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3 years ago

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The area of a rectangle is 30 square feet. The base of the rectangle is 7.5

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Answer:

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Step-by-step explanation:

<h3>Area of rectangle:</h3>

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2 years ago

4x-y=2 2x+9y=-12 unsure how to solve

Anna11 [10]

Simple, use the process of elimination to figure this out:

4x-y=2
2x+9y=-12

Convert these, to be able to find either x or y.

2(4x-y=2) 8x-2y=4 multiply by 2.
then
4(2x+9y=-12) 8x+36y=-48

Which makes them

8x-2y=4
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8x+36y=-48

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This simplified makes it y= -26/19.

Then plug y back into the original equation

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4 years ago

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Ann [662]

Answer:

Part 1. $\dfrac{x+1}{2x}=\dfrac{x^2-7x+10}{4x}.$

Part 2. Solutions: $x_1=1,\ x_2=8.$

Extraneous solution: $x=0.$

Step-by-step explanation:

Part 1. You are given the equation

$\dfrac{1}{2}+\dfrac{1}{2x}=\dfrac{x^2-7x+10}{4x}.$

Note that

$\dfrac{1}{2}+\dfrac{1}{2x}=\dfrac{x+1}{2x},$

then the equation rewritten as proportion is

$\dfrac{x+1}{2x}=\dfrac{x^2-7x+10}{4x}.$

Part 2. Solve this equation using the main property of proportion:

$4x\cdot (x+1)=2x\cdot (x^2-7x+10),\\ \\2x(2x+2-x^2+7x-10)=0,\\ \\2x(-x^2+9x-8)=0.$

x cannot be equal 0 (it is placed in the denominator of the initial equation and denominator cannot be 0), so $x=0$ is extraneous solution to the equation.

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$-x^2+9x-8=0,\\ \\x^2-9x+8=0,\\ \\x_{1,2}=\dfrac{9\pm\sqrt{(-9)^2-4\cdot 8}}{2}=\dfrac{9\pm7}{2}=1,\ 8.$

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3 years ago

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