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3 years ago

What is 4x+ 9y +3 (x+y) simplified?

Mathematics

1 answer:

RoseWind [281]3 years ago

8 0

Answer:

7x+12y

Step-by-step explanation:

Simplify

4x+9y+3(x+y)

Use the distributive property to multiply 3 by x+y.

4x+9y+3x+3y

Combine 4x and 3x to get 7x.

7x+9y+3y

Combine 9y and 3y to get 12y.

7x+12y

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A group of four numbers has an average of 14. The first three numbers are 11, 12 and 17. What's the missing number?

natali 33 [55]

Answer:

Step-by-step explanation:

So if 4 numbers have an average of 14, that means to find the sum of all 4 numbers, you work backwards & multiply 4x14 to get 56.

Then 56-the sum of the 3 numbers you already have (11+12+17=40)

56-40=16

To double check, to find the average of 4 numbers that total 56, you divide 56 by 4 & get 14

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3 years ago

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4 years ago

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STALIN [3.7K]

Answer:

8, 15, 17 and $\sqrt{2} , \sqrt{2}, 2$

Step-by-step explanation:

$c=\sqrt{a^2+b^2}$

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3 0

3 years ago

Please help worth 20 points

andrew-mc [135]

Answer:

225

Step-by-step explanation:

350 - 125 = 225

Hope this helps!

7 0

3 years ago

Which expression is equal to 3/5 ? A.3/3 X 5/5 B.3 X 1/5 C.5 X 1/3 D.1/5 X 3/5

Leokris [45]

$A.\ \frac{3}{3}\times\frac{5}{5}=1\times1=1\neq\frac{3}{5}\\\\B.\ 3\times\frac{1}{5}=\frac{3}{1}\times\frac{1}{5}=\boxed{\frac{3}{5}}\\\\C.\ 5\times\frac{1}{3}=\frac{5}{1}\times\frac{1}{3}=\frac{5}{3}\neq\frac{3}{5}\\\\D.\ \frac{1}{5}\times\frac{3}{5}=\frac{3}{25}\neq\frac{3}{5}\\\\\Rightarrow Answer:\boxed{B}$

8 0

3 years ago

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