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3 years ago

Please help me with an addition formula problem!

1 answer:

6 0

2a + 3b = 6
5a + 2b = 4

We multiply the first equation by 5 and the second by 2 and and subtract the second from the first:

10a + 15b = 30
-10a -4b = -8

11b = 22
b = 2

2a + 3(2) = 6
2a = 0
a = 0

Checking,
5(0) + 2(2) = 4
4 = 4, true

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Express the shaded area as a fraction, a decimal, and a percent of the whole.

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Answer:

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Step-by-step explanation:

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3 years ago

What is the ratio of quarters to nickels in a dollar

sleet_krkn [62]

For quarters we have:

$0.25x = 1$

Where,

x: number of quarters

Clearing x we have:

$x = \frac{1}{0.25}\\x = 4$

For nickels we have:

$0.05y = 1$

Where,

y: number of nickels

Clearing y we have:

$y = \frac{1}{0.05}\\y = 20$

Then, the ratio of quarters to nickels is:

$\frac{x}{y}= \frac{4}{20}$

Simplifying we have:

$\frac{x}{y} = \frac{1}{5}$

Answer:

The ratio of quarters to nickels in a dollar is:

$\frac{x}{y}= \frac{1}{5}$

5 0

2 years ago

Read 2 more answers

The length of a rectangle is 5 in longer than its width. if the perimeter of the rectangle is 34 in , find its area.

shtirl [24]

Area(A)= lw
perimeter(P)= 2w+2l= 34in
length(l)= w+5
width(w)= w

1/2 P= 17= w+l
17= w+(w+5)
17= 2w+5
2w=12
w=6 in

l= w+5
l= 6+5
l=11 in

A= lw= (11)(6)= 66in²

Answer:
Area of rectangle is 66 in².

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2 years ago

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Step-by-step explanation:

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3 years ago

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