What is the value of x in the equation 4x+8y=40 when y=0.8

Answers

Answer 1

Answer: Substitute in 0.8 for y.

$4x+8y=40 \n \n 4x + 8(0.8) = 40 \n \n 4x + 6.5 = 40 \n \n 4x = 40 - 6.4 \n \n 4x = 33.6 \n \n x = 8.4 \n \n$

The final result is: x = 8.4.

Answer 2

Answer:

you plug in the y .8 to the8 that is 6.4

them you subtract 40 by 6.4that is 33.6

then you divide that by 4is 8.4

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Write a decimal equation that has a product of 3.15... Do not use one as a factor

Answers

Answer:

$0.0315=3.15/100$

Step-by-step explanation:

The equation needs to have a product of 3.15.

And the equation has to be a decimal equation. So we have o use numbers such as 10, 100...

$0.0315=3.15/100$

$0.315=3.15/10$

$31.5=3.15* 10$

$315=3.15* 100$

We can write as many equation as this.

you could have 3.15=100 times 0.0315, 10 times 0.315

What is the decimal multiplier to increase by 1.7%?

Answers

Answer:

1.017

Step-by-step explanation:

hope this helped ✨

Kelly decides to pour her punch into 1 quart containers to fit into her refrigerator until the party starts.she has four 1 quart containers.willall of her punch fit into the comtainers?

Answers

It depends how much punch she has. We don't know how many jars she will need if we don't know how much liquid there actually is.

The question says evaluate 2a-b/b when a=4 and b=-3.
How would I start this problem?

Answers

You would start by writing down the expression that you have to evaluate:

2a - b/b

Then, get to work:
-- Wherever you see 'a', put in 4 .
-- Wherever you see 'b', put in -3 .

2(4) - (-3/-3)

Can you handle that ?

Hint:
The thing on the right is a fraction with the same number on top and bottom.
Any fraction like that is always equal to ' 1 '.

$(2a-b)/(b)\n\nsubstitute\ a=4;\ b=-3:\n\n(2\cdot4-(-3))/(-3)=(8+3)/(-3)=-(11)/(3)=-3(2)/(3)$

$or\ if\ 2a+(b)/(b)=2a+1\ then\ for\ a=4\ and\ b=-3:\n\n2\cdot4-3=8-3=5$

Simplify the expression:z2-z(z+3)+3z

Answers

$z^2-z(z+3)+3z=z^2-z\cdot z-z\cdot3+3z=z^2-z^2-3z+3z=0$

1. A pair of supplementary angles is shown. One angle measures 10x and the other angle measures 70 degrees.What is the value of x?

A) 10°
B) 11°
C) 20°
D) 21°

2. A right angle is shown divided in two parts. The measure of the angle of one part is 30 degrees and the measure of the other part is 5x plus 15 degrees. What is the value of x?

A) 3
B) 9
C) 12
D) 15

Answers

1.
supplementary add to 180
10x+70=180
minus 70 both sides
10x=110
divid both sides by 10
x=11 degrees
B

2.
right angle is 90 degrees
30+5x+15=90
5x+45=90
minus 45 both sides
5x=45
divide 5 both sides
x=9
B

1. B
2. B

1) 10x+70 = 180

10x = 180-70

10x = 110

x =11

2) 5x+15+30 =90

5x = 90-45

x = 45/5

x = 9

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