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2 years ago

Find f(-2) if f(x) = x + x + 7. f(-2) =

Mathematics

1 answer:

Lynna [10]2 years ago

3 0

Answer:

f(-2) = 9

Step-by-step explanation:

Given that,

f(x) = x² + x + 7

We need to find the value of f(-2).

Put x = -2 in the given function.

f(-2) = (-2)² + (-2) + 7

= 4-2+7

= 9

Hence, the value of f(-2) is equal to 9.

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3(k − 99) = –60 <br><br>k = ______

MArishka [77]

Answer:

k = 79

Step-by-step explanation:

3(k-99) = -60

(k-99) = -20

k= -20+99

k=79

4 0

3 years ago

The speed of light is about 3x10^8 m/s what is the speed of light in kilometers per hour

BigorU [14]

$3*10^8 \frac{m}{s} \\\\ 1m\to 10^{-3}km \\\\ 1s\to 36*10^{-4} h \\\\\\ 3*10^8* \frac{10^{-3}km}{36*10^{-4}s}= 10^8 * \frac{10^{-3}*10^4km}{12s}= \\\\ =10^8* \frac{10m}{12s}= \\\\ =10^8* 83*10^{-2} \frac{m}{s}=\\\\= \boxed{83*10^6 \frac{m}{s}}$

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3 years ago

Read 2 more answers

In a coin collection,the number of dimes is 6 more than twice the number of nickels if the collection has 36 dimes how many nick

gulaghasi [49]

15 nickels, hope this helps :)

4 0

3 years ago

Read 2 more answers

Write out the sample space for the given experiment. Use the following letters to indicate each choice: M for mushrooms, A for a

Olenka [21]

Answer:

AEI

Step-by-step explanation:

I don't know I don't really like shrimp or honey musterd

8 0

2 years ago

One cell phone company offers a plan that costs $23.99 and includes unlimited night and weekend

MrMuchimi

Answer: 18 minutes

Step-by-step explanation:

Plan one: 23.99

Plan two: 17.99+(0.35x). X equals charge per minute at night and weekends.

We can subtract our main payment plans that don’t include variables, 23.99-17.99=6. We can then divide by our constant... 6/0.35 to get 17.14... minutes. so we can round up to 18 mins.

To make sure we are correct we can do,

17.99+(0.35)(18) to get 24.29 which is greater than 23.99.

MARK ME AS BRAINLIEST PLEASE!!!

6 0

3 years ago