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jonny [76]
3 years ago
8

Which is the completely factored form of 3xsquared -12x-15?

Mathematics
1 answer:
tekilochka [14]3 years ago
7 0

Answer:

3(x - 5)(x + 1).

Step-by-step explanation:

3x^2 - 12x - 15

Dividing through by 3:

= 3(x^2 - 4x - 5)

We need 2 numbers whose sum is -4 and whose product = -5. That is -5 and +1 , so the factors are:

3(x - 5)(x + 1).

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A direct variation includes the points (3, 12) and (n, 8). Find n.
vampirchik [111]

For a direct variation between each point (x, y),

\begin{gathered} x\propto y \\ x=ky \\ k=\frac{x}{y} \end{gathered}

For (x₁, y₁) = (3, 12),

\begin{gathered} k=\frac{3}{12} \\ k=0.25 \end{gathered}

To find n, consider (n, 8) = (x, y)

\begin{gathered} x=ky \\  \end{gathered}

Substituting,

\begin{gathered} n=0.25\times8 \\ n=2 \end{gathered}

Therefore, the value of n is 2

5 0
1 year ago
Will mark brainliest and give 20 points!
jenyasd209 [6]
Verticalset the denominator of the function equal to zero and solve for 'x', x is the vertical asymptote.Horizontalsubtract the amount of x's in the numerator from the number of x's in the denominator, then do one of the four things to find y: and if the answer is negative, then y=0 does that help any?if the answer is 0, then y= a/b (ax/bx)<span>If the answer is greater than positive 1, then there is no horizontal asymptote
</span>ObliqueIf the answer is 1, then it is oblique. use long division with the denominator as the divisor of the overall function given (not the fraction) and y= ax+/- b 
Does this help at all
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3 0
4 years ago
I need to know about the gradient
andrey2020 [161]

Answer:

Step-by-step explanation:

4 0
3 years ago
Jeans are $20 for 2 pairs. Kerry spent $40 on jeans. how many pairs did she buy?
timurjin [86]

Answer:

4

Step-by-step explanation:

Your answer would be 4 because if she spent $20 for 2 pairs you would then know that it would be $10 for 1 pair so it would be $40 for 4 pairs therefor Kerry bought 4 pairs of jeans.Hope it helps you!

7 0
2 years ago
Read 2 more answers
The distance between 5,3 and 1,3
mel-nik [20]

Answer:

(4,0)

Step-by-step explanation:

(5,3) (1,3)

You need to subtract from the x axis on both coordinates and the y axis in both coordinates.

(5-1) (3-3)

(4,0)

I also checked on a graph as well, so it's correct.

4 0
3 years ago
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