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3 years ago

Someone pls help it a exam I’ll give brainiest :)

Mathematics

1 answer:

Zanzabum3 years ago

6 0

I think it’s the first answer! Good luck!

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Fill in the blank for the following two-column proof.<br> Given: 3x+1=-14 Prove: x=-5

VladimirAG [237]

Answer:

x does equal -5

Step-by-step explanation:

Add -1 to each side.

1+-1+3x-14+-1

Combine the like terms.

0+3x=-14+-1

3x=-14+-1

3x=-15

Divide that by 3.

x= -5

Hope this helps. Plz give brainliest.

5 0

3 years ago

Read 2 more answers

HELP ME PLZZ I DONT UNDERSTAND THIS!!!!!!

sweet-ann [11.9K]

Answer:

1/2

Step-by-step explanation:

y = kx

where k is the constant of proportionality

y = 1/2 x so k= 1/2

4 0

4 years ago

Help me with this plz

Lisa [10]

The answer is the first one

5 0

3 years ago

Read 2 more answers

Find the average rate of change of the function between the given values of x. y = 9+ 5x + 0.5x2 between x = 2 and x = 4.

svet-max [94.6K]

Answer:

The average rate of change is 8.

Step-by-step explanation:

The formula to calculate the average rate of change of a function F(x) is:

$\frac{F(b)-F(a)}{b-a}$

In this case, F(x) = $0.5x^{2} +5x+9$

a=2 and b=4

You have to evaluate x=2 (which is a in the formula) and x=4 (which is b in the formula) in the function.

In order to obtain F(b) and F(a) you have to replace x=4 and x=2 in the given function:

F(b) = $(0.5)4^{2} + 5(4) +9= 37$

F(a) = $(0.5)2^{2} + 5(2)+9=21$

$\frac{F(b)-F(a)}{b-a} = \frac{37-21}{4-2}=\frac{16}{2} = 8$

The answer is 8.

3 0

3 years ago

Use the grouping method to factor the polynomial below completely 3x^3+9x^2+5x+15

Tomtit [17]

Answer:

(x+3)( 3x^2 +5)

Step-by-step explanation:

3x^3+9x^2+5x+15

Split into two groups

3x^3+9x^2 +5x+15

Factor 3x^2 out of the first group and 5 out of the second group

3x^2 ( x+3) + 5(x+3)

Factor out x+3

(x+3)( 3x^2 +5)

6 0

3 years ago