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Lyrx [107]
2 years ago
14

Help me pls this is 8th grade math fastest answer gets brainliest show work pls

Mathematics
2 answers:
murzikaleks [220]2 years ago
6 0

Answer:

1. x^11 2. x^7 3. y^12

Step-by-step explanation:

1. you add the exponents together 8+3 = 11 2. you subtract the exponents 9-2=7 3. you multiple the exponents 4x3=12

miskamm [114]2 years ago
3 0

Answer:

1: x ^11

2: y ^12

3: x^ 7

Step-by-step explanation:

In 1 we give the sum

In 2 we give the multiple

In 3 we minus

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If $-2 < x \le 3,$ then find all possible values of $5x + 1.$ Give your answer in interval notation.
kotegsom [21]

Answer: (-9, 16]

This is the interval from -9 to 16. Exclude -9 but include 16.

=====================================================

Work Shown:

The idea is to multiply all sides by 5, then add 1 to all sides

-2 < x \le 3

5(-2) < 5x \le 5(3)

-10 < 5x \le 15

-10+1 < 5x+1 \le 15+1

-9 < 5x+1 \le 16

This converts to the interval notation  (-9, 16]

note: a curved parenthesis means "do not include this value in the solution set"; while a square bracket has us include the value. So we exclude -9 and include 16.

3 0
3 years ago
How to solve derivative of (sin3x)/x using first principle ​
Leona [35]

\dfrac{d}{dx}(\dfrac{\sin(3x)}{x})

First we must apply the Quotient rule that states,

(\dfrac{f}{g})'=\dfrac{f'g-g'f}{g^2}

This means that our derivative becomes,

\dfrac{\dfrac{d}{dx}(\sin(3x))x-\dfrac{d}{dx}(x)\sin(3x)}{x^2}

Now we need to calculate \dfrac{d}{dx}(\sin(3x)) and \dfrac{d}{dx}(x)

\dfrac{d}{dx}(\sin(3x))=\cos(3x)\cdot3

\dfrac{d}{dx}(x)=1

From here the new equation looks like,

\dfrac{3x\cos(3x)-\sin(3x)}{x^2}

And that is the final result.

Hope this helps.

r3t40

7 0
2 years ago
Read 2 more answers
SHOW that (x + 3) and (x - 2) are factors of f(x) = x4 + 10x3 + 23x2 -<br> 34x - 120.
Anna35 [415]
If f(x) = 0 then it is a root

x + 3 = 0
x=-3
f(-3) = (-3)^4 + 10(-3)^3 + 23(-3)^2 - 34(-3) - 120 = 0

x - 2 = 0
x=2
f(2) = (2)^4 + 10(2)^3 + 23(2)^2 - 34(2) - 120 = 0
8 0
2 years ago
Can y’all help me this stuff ain’t make no sense
Sidana [21]

Answer:

A

Step-by-step explanation:

3 0
2 years ago
What is the perimeter and area of 18 12 13
Greeley [361]

Answer:

p=43 a=78

Step-by-step explanation:

im assuming this is a triangle

perimeter is 18+12+13=43

area is 12*13=156 then divide by 2 =78

3 0
3 years ago
Read 2 more answers
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