2x - y = 3 x = -2y - 1

Mathematics

1 answer:

photoshop1234 [79]3 years ago

7 0

Answer:

Step-by-step explanation:

2x - y = 3

x = -2y - 1

2x - y = 3

2(-2y - 1) - y = 3

-4y - 2 - y = 3 {add 2 to both sides}

- 5y = 5 {divide both sides by (-5)}

y = -1

x = -2y - 1 = -2(-1) - 1 = 2 - 1 = 1

You might be interested in

39 s 150% of what number?

professor190 [17]

Answer:

Hope this helps!

6 0

3 years ago

Help I don't know how to do this<br>

Vilka [71]

Answer:

P(t) = 282.2(1.009)^t

Step-by-step explanation:

Look at the attached image.

Hope you can read my handwriting. the image cut off the right side, b = 1.009213324... but question asks to round to nearest thousandth so it's 1.009

For the second part just use the equation to find P when t = -1 and see if P is less than (underpredicts) the number from the question or greater than (overpredicts) the number. I haven't calculated it but I think it will be smaller and thus underpredicts just from looking at the numbers when t = -1