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3 years ago

7

PLS HELPpslapskodkdosnsplspslpsl

2 answers:

Sever21 [200]3 years ago

7 0

I believe it is c all the others don’t sound right lemme know if i was right :)

Effectus [21]3 years ago

6 0

It is c! you had it right !!

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There are 5,280 feet in one mile how many feet are in 143 miles?

Fynjy0 [20]

Answer:

The answer I think is: 755040

Step-by-step explanation:

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4 years ago

Which ordered pair is a solution to the system of linear equations 1/2x-3/4y=11/60 and 2/5x+1/6y=3/10

natka813 [3]

ANSWER

$( \frac{2}{3} , \frac{1}{5} )$

EXPLANATION

The first equation is

$\frac{1}{2} x - \frac{3}{4} y = \frac{11}{60} ...(1)$

The second equation is

$\frac{2}{5} x + \frac{1}{6} y = \frac{3}{10} ...(2)$

We want to eliminate y, so we multiply the first equation by

$\frac{4}{5}$

$\frac{4}{5} \times \frac{1}{2} x - \frac{4}{5} \times \frac{3}{4} y = \frac{11}{60} \times \frac{4}{5}$

$\frac{2}{5} x - \frac{3}{5} y = \frac{11}{75} ...(3)$

We now subtract equation (3) from (2)

$(\frac{2}{3} x - \frac{2}{3} x )+ ( \frac{1}{6} y - - \frac{3}{5}y ) =( \frac{3}{10} - \frac{11}{75} )$

$\frac{1}{6} y + \frac{3}{5}y =\frac{3}{10} - \frac{11}{75}$

$\frac{23}{30}y = \frac{23}{150}$

Multiply both sides by

$\frac{30}{23}$

$\implies \: \frac{30}{23} \times \frac{23}{30}y= \frac{23}{150} \times \frac{30}{23}$

$\implies \: y = \frac{1}{5}$

Substitute into the first equation to solve for x .

$\frac{1}{2} x - \frac{3}{4} \times \frac{1}{5} = \frac{11}{60}$

Multiply to obtain

$\frac{1}{2} x - \frac{3}{20} = \frac{11}{60}$

$\frac{1}{2} x = \frac{11}{60} + \frac{3}{20}$

$\frac{1}{2} x = \frac{1}{3}$

Multiply both sides by 2.

$2 \times \frac{1}{2} x =2 \times \frac{1}{3}$

$x = \frac{2}{3}$

The solution is

$( \frac{2}{3} , \frac{1}{5} )$

5 0

3 years ago

Read 2 more answers

F(x)=-x^2+x<br> f(x)=−x <br> Find f(−1)

STALIN [3.7K]

Answer:

<u>Step 1: Set x to -1 in the first equation </u>

$f(x) = -x^2 + x$

$f(-1) = -(-1)^2 + (-1)$

$f(-1) = -(1) - 1$

$f(-1) = -1 - 1$

$f(-1) = -2$

<u>Step 2: Set x to -1 in the second equation </u>

$f(x) = -x$

$f(-1) = -(-1)$

$f(-1) = 1$

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3 years ago

Solve for x.<br> 4x - 8 = -3(2x + 6)

Alenkinab [10]

Answer:

x= -1

Step-by-step explanation:

First, distribute the -3 through the parentheses

4x-8= -3(2x+6)

= 4x-8= -6x-18

Second, move the variable to the left-hand side and change its sign

4x+6x= -18+8

10x= -10

Divide both sides by 10

x=-1

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3 years ago

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Sara has to pay $10.75 a month for gym membership but will be billed yearly.how much will she pay in 5 1/2 years.

natta225 [31]

If it's 10.75 for one month, and there are 66 months in 5 and a half years, 10.75 x 66 = $907.50

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3 years ago

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