3 years ago

Factor a number, variable, or expression out of the polynomial shown below. 7x - 21

Mathematics

2 answers:

goldenfox [79]3 years ago

8 0

This I quiet easy all u do is what I show u above I hope this help because I want to show help others

stellarik [79]3 years ago

4 0

7(x - 3)
Hope this helps! :)

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HELP ASAP I’ll mark you as brainlister

noname [10]

Answer:The answer is 3.2 yards

Step-by-step explanation:

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3 years ago

3x=x+6 how do I solve step by step

alexdok [17]

Answer:

Step-by-step explanation:

3x=x+6

3x-x=6

2x=6

divide both sides by 2

x=3

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4 years ago

Read 2 more answers

The equation of a circle is (x - 4)2 + (y - 2)2 = 9. Determine the coordinates of the center of the circle.

Georgia [21]

The equation of a circle is (x - a)² + (y - b)² = r², where the coordinates of the center(C) are C(a,b) and "r" the radius. Here, C(4,2) and if you need, r=3.

Thanks for your trust!!

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4 years ago

Work out the new Amount after a 10% increase A) £14 B) 240g C) 20p D) 110mm

nasty-shy [4]

Answer:

a) £15.40 b) 260g c) 22p d) 121mm

Step-by-step explanation:

To work out a 10% increase, times the number by 1.10 or 1.1!

Hope this helped :)

3 0

3 years ago

A circular oil slick is expanding at a rate of 3m/min. How fast is the area of the oil slick changing when the diameter is 48 me

olga55 [171]

Answer:

$48\pi \:m/min$

Step-by-step explanation:

Diameter = 48 m

Therefore radius r = 48/2 = 24 m

$Area \: of \: circular \: oil \: slick \\ A = \pi {r}^{2} \\ differentiating \: w \: r \: to \: t \: on \: \\ both \: sides \\ \\ \frac{dA}{dt} = \frac{d}{dt} (\pi {r}^{2} )\\ \\ \frac{dA}{dt} =\pi \frac{d}{dt} {r}^{2} \\ \\ \frac{dA}{dt} =\pi \times 2{r}\\ \\ \frac{dA}{dt} =2\pi {r} \\ \\ \bigg(\frac{dA}{dt} \bigg)_{r=24} =2\pi \times {24} \\ \\ \bigg(\frac{dA}{dt} \bigg)_{r=24} =48\pi \: m \: per \: min$

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3 years ago