3 years ago

Identify a real live situation where opposite qualities combine to make zero

1 answer:

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I have one cookie. A minute later I want to eat a cookie. That's one cookie plus a negative one cookie. At the end, I have no cookie left.

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65 plus what two numbers will get me 180 ?

Advocard [28]

Answer:

So, to find the number we have to subtract 65 from 180 180-65 = 115 So 115 will be added to 65 to get 180.

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3 years ago

The equation of a line is given by y−3=4(x+5)

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4x + 23 is what I got this is very confusing

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3 years ago

What is the y-intercept of the function f(x) = -2/9x + 1/3x?

lora16 [44]

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Step-by-step explanation:

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3 years ago

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

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

$n+2 = 0.6*(n+8)$

$n + 2 = 0.6n + 4.8$

$n - 0.6n = 4.8 - 2$

$0.4n = 2.8$

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

$n = 7$

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

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3 years ago

Jennifer owes $192 to a credit card company. She makes a $ 25 purchase with the card, and then pays $ 40 on the account. What

Alecsey [184]

Her current balance would be $177

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3 years ago

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