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2 years ago

4m = -32 solve for M will give brainliest.

Mathematics

2 answers:

ZanzabumX [31]2 years ago

6 0

Answer:

From this quation:

4m = -32

We need to get m, so we can divide both sides by 4:

4m / 4 = -32 /4

m = -8

You can try to replace it to see if it's correct:

4 * 8 = -32

erica [24]2 years ago

4 0

Answer:

m = -8

Step-by-step explanation:

have a nice day! :)

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Andrew got a 95% on the test. If there were 80 questions on the test, and every question worth the same, how many questions did

Lemur [1.5K]

Answer:

Out of 80 questions Andrew did 76 questions correctly.

Step-by-step explanation:

Total number of questions is 80.

It is given that he got 95% on the test. It means he answered 95% of the total questions correctly.

First we have to calculate 95% of 80.

$80\times \frac{95}{100}=76$

The 95% of 80 is 76. So, 76 answers are correct.

Therefore out of 80 Andrew did 76 questions correctly.

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3 years ago

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Find the set of values of k for which the line y=kx-4 intersects the curve y=x²-2x at 2 distinct points?

Sonbull [250]

Answer:

$-6 < k < 2$

Step-by-step explanation:

Given

$y = x^2 - 2x$

$y =kx -4$

Required

Possible values of k

The general quadratic equation is:

$ax^2 + bx + c = 0$

Subtract $y = x^2 - 2x$ and $y =kx -4$

$y - y = x^2 - 2x - kx +4$

$0 = x^2 - 2x - kx +4$

Factorize:

$0 = x^2 +x(-2 - k) +4$

Rewrite as:

$x^2 +x(-2 - k) +4=0$

Compare the above equation to: $ax^2 + bx + c = 0$

$a = 1$

$b= -2-k$

$c =4$

For the equation to have two distinct solution, the following must be true:

$b^2 - 4ac > 0$

So, we have:

$(-2-k)^2 -4*1*4>0$

$(-2-k)^2 -16>0$

Expand

$4 +4k+k^2-16>0$

Rewrite as:

$k^2 + 4k - 16 + 4 >0$

$k^2 + 4k - 12 >0$

Expand

$k^2 + 6k-2k - 12 >0$

Factorize

$k(k + 6)-2(k + 6) >0$

Factor out k + 6

$(k -2)(k + 6) >0$

Split:

$k -2 > 0$ or $k + 6> 0$

So:

$k > 2$ or k $> -6$

To make the above inequality true, we set:

$k < 2$ or $k >-6$

So, the set of values of k is:

$-6 < k < 2$

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2 years ago

Which correctly combines like terms in the following expression? (8th Math Middle School)

fiasKO [112]

Answer:

The answer you are looking for is 2x^+2x-5

Step-by-step explanation:

You just combine them

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allochka39001 [22]

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2 years ago

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Plz Help me

Dafna1 [17]

Answer:

6/0

Step-by-step explanation:

Step 1: Label your x and y's

(0,-11) (0, 5)

x1 y1 x2 y2

Step 2: Plug in your x1, x2, y1, and y2 into the slope formula

The slope formula is y1 -y2/ x1 - x2

-5-(-11)/ 0 = 6/0

Undefined

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2 years ago