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SVETLANKA909090 [29]

3 years ago

15

Solve the equation for x. 3/10x-1/5=-2

1 answer:

Ray Of Light [21]3 years ago

4 0

3/10x-1/5=-2

First we Add 1/5 to both sides

1/5+-2=-1.8

So our problem now becomes

3/10x1.8=-2
Now we have to divide both sides by 3/10

3/10/-2=-0.15

x=-0.15

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Pick the set of numbers which contain ALL perfect squares:

Ede4ka [16]

Well, a way to do this problem would be to find the set of numbers that all of rational square roots. A list of perfect squares would be 1^2=1, 2^2=4, 3^2=9, 4^2=16, 5^2=25, 6^2=36, 7^2=49, 8^2=64, 9^2=81, 10^2=100.

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3 years ago

Which pairs are like terms in the expression below? Select all that apply.

seraphim [82]

9514 1404 393

Answer:

B, E

Step-by-step explanation:

Like terms are ones that have the same variable, or that have no variable at all.

There are two terms with y as the variable. These are like terms.

There are two constant terms (with no variable). These are like terms.

The like term pairs are ...

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3 years ago

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Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

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diamong [38]

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8 0

3 years ago

Read 2 more answers

2) Brian purchased pens for 75 cents each and pencils for 40 cents each he bought total of 22 writing utensils for $11.95. How m

d1i1m1o1n [39]

Answer:

13 pencils.

Step-by-step explanation:

Let x be the pens and y be the pencils

Given:

Brian purchased pens for 75 cents each and pencils for 40 cents each he bought total of 22 writing utensils for $11.95.

Total pens and pencils is 22

So, $x+y=22$ ----------------(1)

And he bought all utensils for $11.95. and each pen for 75 cents and pencils for 40 cents.

$0.75x+0.40y=11.95$ ------------(2)

solve equation 1 and equation 2 for x and y.

From equation 1.

$x+y=22$

$y=22-x$ ----------------(3)

put y value in equation 2.

$0.75x+0.4(22-x)=11.95$

$0.75x+0.4\times 22-0.4x=11.95$

$0.75x+8.8-0.4x=11.95$

$0.75x-0.4x=11.95-8.8$

$0.35x=3.15$

$x=\frac{3.15}{0.35}$

$x=9$

Now substitute x value in equation 3.

$y=22-9$

$y=13$

So, he buy 13 pencils.

5 0

3 years ago