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3 years ago

Factor the expression. x2-x-6

Mathematics

2 answers:

Anastasy [175]3 years ago

4 0

Answer:

$(x-3)(x+2)$

Step-by-step explanation:

$x^2-x-6\\=x^2-3x+2x-6\\=x(x-3)+2(x-3)\\=(x-3)(x+2)$

lisabon 2012 [21]3 years ago

3 0

Answer:

(x+2)⋅(x−3)

Step-by-step explanation:

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A go-cart racetrack has 100-meter straightaways and semicircular ends with diameters of 40 meters. Calculate the average speed i

emmainna [20.7K]

Answer:

Average speed of go cart is 217.07 meters per minute.

Step-by-step explanation:

We are given the following in the question:

Length of straightway racetrack = 100 m

Diameter of semicircular end = 40 m

Radius =

$r = \dfrac{d}{2} = \dfrac{40}{2} = 20\text{ m}$

Perimeter of racetrack =

Perimeter of semicircle + 2(Length of straightway) + Perimeter of semicircle

$=\pi r + 2(100) + \pi r\\=2\pi r + 2(200)\\=(2\times 3.14\times 20) + 200\\=325.6\text{ m}$

Speed =

$s = \dfrac{\text{Distance}}{\text{Time}}\\\\s = \dfrac{4\times \text{Perimeter of track}}{6}\\\\s = \dfrac{4\times 325.6}{6}\\\\s = 217.06\text{ meter per minute}$

Thus, average speed of go cart is 217.07 meters per minute.

4 0

3 years ago

Domain and range of: s={(-9,6),(5,6),(-3,0)}

dem82 [27]

Answer:

domain={-9,5,-3}

range={6,0}

3 0

3 years ago

9. 5(6р -3) -2 = 2(15р – 11) - 5

amm1812

You’re answer would be 0=0

5 0

3 years ago

Read 2 more answers

A fair coin is tossed in the air 50 times. It landed on tail 24 times. What is the experiment probability that the coin will NOT

Daniel [21]

Answer:50/50

Step-by-step explanation:

It’s a 50/50 chance because there is only two sides to a coin

6 0

4 years ago

En una tienda de electrodomesticos , una nevera con un precio de 260€ fue rebajada un 15% ; al cabo de un mes volvieron a rebaja

Mamont248 [21]

Answer:

Part 1) The price after the second discount is 187.85€

Part 2) The percentage of total variation is 27.75%

Step-by-step explanation:

The question in English is

In an appliance store, a refrigerator with a price of 260€ was discounted by 15%; after one month it was discounted by another 15%. What is the price after the second discount? What is the percentage of total variation?

Part 1)

<em>Find out the price after the second discount</em>

we know that

$15\%=15/100=0.15$

A) The first discount is equal to

260€(0.15)=39€

The price after the first discount is equal to

260€-39€=221€

B) The second discount is equal to

221€(0.15)=33.15€

The price after the second discount is equal to

221€-33.15€=187.85€

Part 2) Find out the percentage of total variation

we know that

The original price of 260€ represent the 100%

by using proportion

Find out the percentage that represent (260€-187.85€)=72.15€

$\frac{260}{100}=\frac{72.15}{x}\\ \\x=72.15*100/260\\ \\x=27.75\%$

8 0

4 years ago

Factor the expression. x2-x-6​

Factor the expression. x2-x-6