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3 years ago

Y = X3 – X –1 if x = -1, Y = ?

Mathematics

2 answers:

AlekseyPX3 years ago

8 0

Y = ( -1 ).3 - ( -1 ) - 1

Y = -3 + 1 - 1

Y = -3

Akimi4 [234]3 years ago

6 0

Answer:

-3

hope this helps!

Step-by-step explanation:

(-1)3 - (-1) - 1 =

-3 - (-1) - 1 =

-2 - 1 = -3

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A tennis player keeps track of the number of successful first serves he makes. During the first 8 service points of a game, only

Andru [333]

Answer:

He needs 7 more consecutive successful first serves to raise his first serve percentage to 60%.

Step-by-step explanation:

After n consecutive serves, his total number of serves is going to be n+8, since he has already served 8 times. In the best case, his number of successful first serves is n+2.

His percentage of succesful first serves is the division of the number of succesful first serves divided by the total number of serves. So

$P = \frac{n+2}{n+8}$

We want $P = 0.60$ . So

$0.6 = \frac{n+2}{n+8}$

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$n = \frac{2.8}{0.4}$

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5 0

3 years ago

1.9s+6=3.1-s can you help me with this, thank you

Airida [17]

Steps:
1.9s + 6 = 3.1 - s
2.9s + 6 = 3.1
2.9s = -2.9
s = -1

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3 years ago

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Ierofanga [76]

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3 years ago

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