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2 years ago

Combine the like terms to create an equivalent expression: 7n+4+(-2n)

Mathematics

2 answers:

Paul [167]2 years ago

6 0

Answer:

5n+4

Step-by-step explanation:

7n - 2n= 5n

TEA [102]2 years ago

3 0

Answer:

5n + 4

Step-by-step explanation:

7n + 4 + (-2n)

= 7n + 4 - 2n

= 5n + 4

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Determine the lengths of the sides of the rectangle using the given area. Give answers both exactly and

Degger [83]

Answer:

Part a) Exactly values

The width of the rectangle is $\frac{\sqrt{70}}{2}\ cm$

The length of the rectangle is $2\sqrt{70}\ cm$

Part b) Approximately values

The width of the rectangle is $4.2\ cm$

The length of the rectangle is $16.7\ cm$

Step-by-step explanation:

see the attached figure to better understand the problem

we know that

The area of rectangle is equal to

$A=LW$

we have

$L=4x\ cm\\W=x\ cm$

substitute the values in the formula

$A=4x(x)$

$A=4x^2$

$A=70\ cm^2$

$70=4x^2$

Solve for x

Divide by 4 both sides

$\frac{70}{4}=x^2$

square root both sides

$x=(+/-)\frac{\sqrt{70}}{2}$

The solution is the positive value

$x=\frac{\sqrt{70}}{2}$

therefore

<em>Exactly values</em>

$L=4\sqrt{70}}{2}=2\sqrt{70}\ cm\\\\W=\frac{\sqrt{70}}{2}\ cm$

<em>Approximately values</em>

$L=4\sqrt{70}}{2}=16.7\ cm\\\\W=\frac{\sqrt{70}}{2}=4.2\ cm$

6 0

2 years ago

5x5=25 i did the quiz and got it right

Sedaia [141]

Congratsss good jobbb

5 0

1 year ago

Read 2 more answers

Please help i will give u brainliest :)

horrorfan [7]

Answer:

425+250 times 8.3%

Step-by-step explanation:

6 0

2 years ago

Help me thank u alot <333

Arisa [49]

Answer:

N~U

P~V

Q~S

R~T

(im confused on the second picture, give me time to figure it out)

Step-by-step explanation:

4 0

1 year ago

How do you convert 4/25 into a percent

Alex777 [14]

You see how many times 4 can go into 25 witch is 6 not 7 because 7 x 4 is28 and 28is bigger than25 so the answer is and 1/4 is25 cence so the answer is 4.25

7 0

2 years ago

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