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vova2212 [387]
3 years ago
9

Find the value of x and y. y=2x and 1.85x+3.7y=12.95

Mathematics
1 answer:
Len [333]3 years ago
3 0

Answer:

x=1.4 y=2.8

Step-by-step explanation:

Lets substitute y with 2x. We get: 1.85x+7.4x=12.95.

Simplifying by combining x: 9.25x=12.95

Then you just divide 12.95 by 9.25: x=1.4

Now for y. We know why is 2x so we just have to multiply x by 2: y=2x, y=2.8.

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Step-by-step explanation:

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Which graph represents 2x − 5y ≥ − 20
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Step-by-step explanation:

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3 years ago
Which equations are equivalent to the expression below ? Check all that apply
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It looks like selections A and C are identical. (Neither is equivalent to 9^x.)

If B is supposed to be 3^(2x), it is equivalent to F and D and to the given expression.

Of course, D evaluates to 9^x, so is equivalent.

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4 years ago
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Answer:

B. Line B

General Formulas and Concepts:

<u>Algebra I</u>

Undefined slopes are when x equals a certain number.

Slope-Intercept Form: y = mx + b

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  • b - y-intercept

Step-by-step explanation:

From the given choices, B is the correct answer.

A has a slope of 0, so <em>m</em> = 0 and would become a horizontal line.

C has a negative slope, so it is not undefined.

D has a positive slope, so it is not undefined.

B shows a vertical line, and so it has an undefined slope.

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Boyle’s law states that the volume of a gas varies inversely with applied pressure. Suppose the pressure on 60 cubic meters of g
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\bf \qquad \qquad \textit{inverse proportional variation}&#10;\\\\&#10;\textit{\underline{y} varies inversely with \underline{x}}\qquad \qquad  y=\cfrac{k}{x}\impliedby &#10;\begin{array}{llll}&#10;k=constant\ of\\&#10;\qquad  variation&#10;\end{array}\\\\&#10;-------------------------------

\bf \stackrel{\textit{the volume of a gas varies inversely with applied pressure}}{v=\cfrac{k}{p}}&#10;\\\\\\&#10;\textit{we also know that }&#10;\begin{cases}&#10;v=60\\&#10;p=1&#10;\end{cases}\implies 60=\cfrac{k}{1}\implies 60=k&#10;\\\\\\&#10;\boxed{v=\cfrac{60}{p}}&#10;\\\\\\&#10;\stackrel{\textit{now if we apply 3 atmospheres, p=3, what is \underline{v}?}}{v=\cfrac{60}{3}}
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4 years ago
Read 2 more answers
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