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3 years ago

Can someone please explain this to me? I've been staring at this for 10 minutes.

Mathematics

2 answers:

Vilka [71]3 years ago

7 0

Always, never. Since you are multiplying the same number that you are dividing 1 by, they would essentially cancel out and leave you with 1. If a and b are both negative, then because a negative multiplied by another negative is always positive, it would never be equal to -1

zloy xaker [14]3 years ago

4 0

never and never

2 negatives multiplied by each other = a positive number

lets look at the first one:

let a = -2

you then have -2*(1/-2) = -2 * (-.5) = 1 ( positive 1 )

2nd eq, multiply a negative by a negative:

a = -3, b=-4, -3*-4 = 12 ( positive 12)

both equations give positive numbers for answers

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Answer:

The equation of new line is: $\mathbf{y=\frac{3}{4}x-12}$

Option H is correct.

Step-by-step explanation:

We need to write an equation for the line that is parallel to the given line $y=\frac{3}{4} x-9$ and point (-8,-18)

The equation of required line will in in form $y=mx+b$ where m is slope and b is y-intercept.

We need to find slope m and b y-intercept for new line.

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When two lines are parallel, they have the same slope.

The slope of given line can be found by comparing the equation $y=\frac{3}{4} x-9$ with $y=mx+b$

So, m = 3/4

The slope of new line will be: $m=\frac{3}{4}$

Finding y-intercept:

Using slope m = 3/4 and point (-8,-18) we can find y-intercept

$y=mx+b\\-18=\frac{3}{4}(-8)+b\\-18=-6+b\\b=-18+6\\b=-12$

So, y-intercept is b=-12

The equation of new line having m = 3/4 and b=-12 is:

$y=mx+b\\y=\frac{3}{4}x-12$

So, the equation of new line is: $\mathbf{y=\frac{3}{4}x-12}$

Option H is correct.

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3 years ago

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Answer:

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2 years ago

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Step-by-step explanation:

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3 years ago

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xz_007 [3.2K]

Answer:

A. f(x)=x^2+x+0.25

Step-by-step explanation:

If x represents Lindsey's distance at 2:00 PM, then 2x represents Kara's distance at 2:00 PM because she walked twice as far as Lindsey. Then adding on the values we got for 2:30 PM, we get that Kara walked a distance of 2x+1 and Lindsey walked a distance of x+0.5 at the time of 2:30 PM. Now, we know that they have formed a right triangle because we are given the directions they walked in; east and north. This allows us to use a formula for the area of a right triangle: 1/2(L x W). Plugging in our values, we get...

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which is our answer.

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