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2 years ago

Please Please Pleaseeeeeeeeee help me out with this question.

Mathematics

2 answers:

blsea [12.9K]2 years ago

6 0

Answer:

(a) option A & 30 dollars more (b) 75 if she drives less A will be cheaper

Step-by-step explanation:

natka813 [3]2 years ago

4 0

Answer:

If she drives the car 150 miles, option A costs more. It'll cost $30 more.

The options cost the same if she drives 75 miles. If she drives less than 75 miles, option A costs less.

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What is the surface area of the cylinder?

guajiro [1.7K]

Answer:

i think it is C 80π ft^2

that is because 10*8=80

6 0

2 years ago

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Y-3=-3y-43 how would i solve?

frez [133]

Answer: y−3=−3y−43

Step 1: Add 3y to both sides.

y−3+3y=−3y−43+3y

4y−3=−43

Step 2: Add 3 to both sides.

4y−3+3=−43+3

4y=−40

Step 3: Divide both sides by 4.

−40

y=−10

Answer:

y=−10

Step-by-step explanation: brainliest:)

7 0

2 years ago

What are all of the real roots of the following polynomial? f(x) x^4-24x^2-25

Greeley [361]

<u>Answer:</u>

x = ±5

<u>Step-by-step explanation:</u>

We are given the following polynomial function and we are to find all of its real roots:

$x^4-24x^2-25$

Let $y=x^2$ so we can now write it as:

$y^2-24y-25$

Factorizing it to get:

$(y^2+y)+(-25y-25)$

$y\left(y+1\right)-25\left(y+1\right)$

$\left ( y + 1 \right ) \left ( y - 2 5 \right)$

Substitute back $y=x^2$ to get:

$\left ( x^2 + 1 \right ) \left ( x^2 - 25 \right )$

$\left ( x^2 + 1 \right ) \left ( x + 5 \right ) \left ( x - 5 \right )$

The quadratic factor has only complex roots. Therefore, the real roots are x = ±5.

3 0

3 years ago

Read 2 more answers

The polynomial given below has _____ root(s).

lisov135 [29]

3x²-8x+4=0
(3x-2) (x-2)=0
x=2/3 , x = 2
Hence, the polynomial has two positive roots.
Option A is the correct choice.

8 0

2 years ago

Calculate the angle of depression, x, if the boat is 850 ft. away from the lighthouse and the lighthouse is 250 ft. high. Round

trapecia [35]

Firstly , we can draw diagram

we can see that

adjacent = 850

opposite =250

so, we can use tan formula

$tan(x)=\frac{250}{850}$

$x=tan^{-1}(\frac{250}{850})$

16.38

$x=16.38$

so,

angle of depression is 16.38 degree........Answer

6 0

3 years ago