I'm really stuck on this part. once i figure out how i'll mark brainliest (however you spell it).

Mathematics

1 answer:

Eddi Din [679]2 years ago

5 0

just the first one 11 ........

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What numbers multiply to -30 and add to -3

krek1111 [17]

Let the numbers be x and y. Then xy = -30 and x+y = -3.

Solve xy = -30 for y: y = -30/x

subst. -30/x for y in x+y= -3: x - 30/x = -3

Multiply all 3 terms by x: x^2 - 30 = -3x, so x^2 + 3x - 10 = 0

Solve this quadratic equation for x. x: {-5, 2}

If x = -5, then x+y = -3 becomes -5 + y = -3, and y = 2.

You should check to determine whether x=2 is also correct. If it is, what is the corresponding y value?

3 0

2 years ago

URGENT <br>Perform the indicated operation and simplify the result.

yan [13]

Answer:

The answer to your question is: (2a - 1) / 4

Step-by-step explanation:

$\frac{12a^{2} - 3}{2} (2a + 1)^{-2} ( \frac{6}{(2a +1)^{-1} } \\$