3 years ago

Which method can't you use to solve x²+7x=0.

Mathematics

1 answer:

scoray [572]3 years ago

6 0

Answer:

Factoring

Step-by-step explanation:

x^2 + 7x = x(x + 7) = 0

x = 0 or x = -7

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What is the product 4n/4n-4 n-1/n+1

olga_2 [115]

4n/4n-4 × n-1/n+1
= 4n(n-1)/(4n-4)(n+1)
= (4n^2 - 4n)/(4n^2 + 4n - 4n-4)
= (4n^2 - 4n)/(4n^2 - 4)
= 4(n^2 - n)/4(n^2 - 1)
=(n^2 - n)/(n^2 - 1)

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3 years ago

If someone could help!

ad-work [718]

Step-by-step explanation:

This time round, use SOH method (Sin angle = Opposite/Hypotenuse)

given Opposite = 7

Hypotenuse = 10

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3 years ago

A drone travels 180 kilometers in the same time a bird travels 120 kilometers. If the drone's speed is 20 km/hr faster than the

allochka39001 [22]

Answer:

drone is 60km/h bird 40km/h

Step-by-step explanation:

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2 years ago

What is the product of 4.5 x 6.2 ?

NeX [460]

4.5 x 6.2 = 27.9

Hope that helps

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2 years ago

Over the first five years of owning her car, Gina drove about 12,200 miles the first year, 16,211 miles the second year, 12,050

weeeeeb [17]

(12,200 + 16,211 + 12,050 + 11,350 + 13,325) / 5 = 65136/5 =
13027.2 <== this is the mean (average)

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median (middle number) = 12,200

there is no mode...a mode is a number that appears most often...all the numbers appear once in this data.

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3 years ago

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