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3 years ago

Which expression is equivalent to 5x + 5y + 5y?

Mathematics

2 answers:

Butoxors [25]3 years ago

6 0

Answer:

5x + 10y

Step-by-step explanation:

5x + 5y + 5y = 5x + 10y

slava [35]3 years ago

6 0

Answer:

$y=-\frac{1}{2}x \\$ OR $x=-2y$

Step-by-step explanation:

Given :

$5x + 5y + 5y\\$

We have to find the equivalent expression of the above equation.

Equating the expression to zero

$5x + 5y + 5y=0\\$

Adding the terms of 'y'

$5x+10y=0\\$

Taking the terms of 'x' to one side and 'y' terms to the other side.

$5x=-10y$

$x=\frac{-10y}{5}\\ x=-2y$

$5x=-10y\\y=-\frac{1}{2}x$

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HELP PLEASE Rory has 10 Gallons 8 cups of water to fill her aquarium how many cups of water does she have? Hint: 1 gallon = 16 c

Lesechka [4]

Answer:

Rory has 168 cups of water

Step-by-step explanation:

Since 1 Gallon is equals to 1 cups, multiply it by 10 gallons then add 8 cups to it

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2 years ago

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Evaluate each expression using the values m = 7, r = 8, and t = 2.

user100 [1]

So I'll walk through the first 2. Then please try the other ones and let me know if you run into more problems.

5m-6

If m is equal to 7, then replace m with 7.

5(7)-6

5x7=35 so the expression is now 35-6. Solve.

35-6=29

So that was the first one.

4m+t

We just do what we do with the first problem.

4(7)+(2)

4x7=28 so the expression is 28+2.

28+2=28

---

hope it helps

p.s. When there is subtraction, add. When there is division, multiply to cancel that out. When there is multiplication, divide to cancel. etc.

6 0

2 years ago

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How many zeros are in the product of any nonzero whole number and 1000?Explain your answer

kotegsom [21]

Answer:

At least 3.

Step-by-step explanation:

It depends on the whole number.

For example 53 * 1000 = 53,000 (3 zeros).

101 * 1000 = 101,000 (4 zeros).

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3 years ago

Find the midpoint of the line segment with end coordinates of: ( 2 , 1 ) and ( 4 , 5 )

Valentin [98]

Step-by-step explanation:

x1=2. y1=1. x2=4. y2=5

by midpoint formula,

2+ 4/2 = 6/2 =3

1+5 /2 =6/2 = 3

therefore,the midpoints are (3,3)

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2 years ago

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1. What is the value of the y variable in the solution to the following system of equations?

ollegr [7]

Part 1)

we have

$3x-6y=3$ ------> equation A

$7x-5y=-11$ ------> equation B

Multiply by $-7$ the equation A

$-7(3x-6y)=-7*3$

$-21x+42y=-21$ ------> equation C

Multiply by $3$ the equation B

$3*(7x-5y)=-11*3$

$21x-15y=-33$ -------> equation D

Adds equation C and equation D

$-21x+42y=-21 \\21x-15y=-33\\---------- \\ 42y-15y=-21-33\\27y=-54 \\ y=-2$

therefore

<u>the answer Part 1) is the option A </u>

$y=-2$

Part 2)

we have

$3x+y=6$

$y=-3x+6$ ------> equation A

$6x+2y=8$

Simplify Divide by $2$ both sides

$3x+y=4$

$y=-3x+4$ ------> equation B

the lines A and B are parallel lines, because the slope m is equal

The system has no solution

therefore

<u>the answer Part 2) is the option D</u>

There is no x value as there is no solution to the system.

Part 3)

we have

$4x+2y=6$ ------> equation A

$x-y=3$

$y=x-3$ ------> equation B

substitute equation B in equation A

$4x+2[x-3]=6$

$6x-6=6$

$6x=12$

$x=2$

therefore

<u>the answer part 3) is the option D</u>

$x=2$

Part 4)

Let

x---------> The number of one-step equations

y---------> The number of two-step equations

we know that

$x+y=1,120$

$x=1,120-y$ -------> equation A

$3x-2y=1,300$ ------> equation B

substitute equation A in equation B

$3[1,120-y]-2y=1,300$

$3,360-5y=1,300$

$5y=3,360-1,300$

$5y=2,060$

$y=412$

therefore

<u>the answer part 4) is the option D</u>

$y=412$

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2 years ago

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