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2 years ago

Please help theres two questions (-2x+8y-11)+(-3y-y+5)

Mathematics

1 answer:

SpyIntel [72]2 years ago

7 0

Answer:

a) "Like terms" are terms whose variables (and their exponents such as the 2 in x²) are the same

8y, -3y and y are all likes terms because the variables are all y

$(-2x+8y-11)+(-3y-y+5)\\\\=-2x+8y-11-3y-y+5\\\\=-2x+(8y-3y-y)+(5-11)\\\\=-2x+4y-6\\\\=2(-x+2y-3)\\\\=-2(x-2y+3)$

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Whats the sum of 8/10 + 17/+100=

yaroslaw [1]

97/100 is the answer.

3 0

3 years ago

Kyle's fencing team is selling calendars to raise money. They earn $0.40 On each calendar they sell. Their goal is to earn more

neonofarm [45]

Answer:

818

Step-by-step explanation:

Amount earned per calendar = $0.40

Target amount = > $327

Least number of calendars they can sell ;

(Number of calendars * amount earned per calendar) > 327

Let number of calendars = x

0.40x > 327

x > 327/0.40

x > 817.5

Least Number of calendars they can sell is 818

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3 years ago

What is a31 of the arithmetic sequence for which a5=3.2 and a9=12.0?

miv72 [106K]

The arithmetic sequence formula:

$a_n=a_1+(n-1)d$

We have:

$a_5=3.2,\ a_9=12.0$

Calculate d (common difference)

$a_9-a_5=4d\\\\4d=12.0-3.2\\\\4d=8.8\ \ \ |:4\\\\d=2.2$

Calculate 31th term:

$a_{31}=a_5+26d\\\\a_{31}=3.2+26\cdot2.2=60.4$

7 0

3 years ago

Caroline, Colin & Sarah share some money.

aev [14]

Answer:

Colin gets $\frac{2}{3}$

Step-by-step explanation:

One part is excluded in the problem. That part is:

"Caroline gets $\frac{1}{9}$ of the money."

<u>Solution:</u>

If Caroline gets 1/9th, then remaining is:

$1-\frac{1}{9}=\frac{8}{9}$

Colin and Sarah share in ratio 3 is to 1, that means 3 + 1 = 4 parts...

8/9th in 4 parts means, each part is:

$\frac{\frac{8}{9}}{4}=\frac{2}{9}$

We know Colin gets "3" parts of the total, each part is (2/9)th, so 3 parts would be:

$3*\frac{2}{9}=\frac{6}{9}=\frac{2}{3}$

Colin gets $\frac{2}{3}$

7 0

3 years ago

Find a formula for the described function.

mote1985 [20]

Answer:

The area of the rectangle is $A=5L-L^2$ .

Step-by-step explanation:

The perimeter of a rectangle is

$P=2(L+W)$

where, L is length and W is width.

It is given that perimeter of a rectangle is 10m.

$10=2(L+W)$

Divide both sides by 2.

$5=L+W$

Subtract L from both sides.

$5-L=W$

Area of a rectangle is

$A=L\times W$

Substitute W=(5-L) in the above formula.

$A=L\times (5-L)$

$A=5L-L^2$

Therefore, the area of the rectangle is $A=5L-L^2$ .

7 0

3 years ago