Solve for y in terms of x -8x + 4y = -16

Mathematics

2 answers:

solniwko [45]4 years ago

4 0

Answer:

y=2x-4

Step-by-step explanation:

well first you have to move the -8x to the other side where the -16 is. by doing so, the -8x will turn into a POSTIVE 8x. than your problem should look like (4y=8x-16). now that your problem is like that, you want "y" to be alone. so, you divide the 4 by every number. (so you would do 4y/4, 8x/4, and -16/4). than your final product would be: y=2x-4

adell [148]4 years ago

4 0

Answer:

x=1/2y + 2

Step-by-step explanation:

multiply the equation. by -1 to make the x value positive, add -4y to both sides, not we have 8x=4y+16, now divide both sides by 8 and you get x=1/2y +2

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Please show steps to answer. No links please

Lana71 [14]

Answer:

<em>18 hours after 10 AM</em>

Step-by-step explanation:

We are looking for the time the helicopter and the plane will be the same distance from Burbank after 10 AM.
We are given the two equations for the distance that the helicopter and the plane are away, in miles.
It also says that R is the variable for time.
Using this information, we need to solve for the time with broth equations, so we would set both up to be equal to each other, since they will be the same distance away from each other.
It would look like this: -150r + 260 = -270r + 440.
Add 150r to both sides.
260 = -10r + 440.
Add -10r to both sides.
Now we have 10r + 260 = 440
Subtract 260 from both sides.
10r = 180
Divide each side by 10 to isolate the R.
R = 18.
It would be 18 hours after 10 AM.