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3 years ago

If f(x) = 2x−5, then what is the value of f(2) + f(5)

Mathematics

1 answer:

DochEvi [55]3 years ago

7 0

First of all f(2)=2(2)-5=-1 and f(5)=2(5)-5=5
so
f(2)+f(3)=-1+5=4

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The sum of Pete's and Sam's ages is 30. Five years ago, Pete was 3 times as old as Sam. How old is Sam?

RUDIKE [14]

P-5=3s-15 because Pete is 20 and Sam is 10. 20-5= 15 and 3(10)-15 also equals 15. The answer is C.

4 0

3 years ago

Read 2 more answers

15-2x=-7x what does x equal

Degger [83]

Answer:

x = -3

Step-by-step explanation:

15 - 2x = -7x

add 2x

15 = -5x

divide by -5

-3 = x

4 0

3 years ago

The percentage of people under the age of 18 was 23.5% in New York City, 25.8% in Chicago, and 26% in Los Angeles.

Hatshy [7]

Answer:

0.0158 = 1.58% probability that all of them are under 18.

Step-by-step explanation:

Probability of independent events:

If three events, A, B and C are independent, the probability of all happening is the multiplication of the probabilities of each happening, that is:

$P(A \cap B \cap C) = P(A)P(B)P(C)$

The percentage of people under the age of 18 was 23.5% in New York City, 25.8% in Chicago, and 26% in Los Angeles.

This means that $P(A) = 0.235, P(B) = 0.258, P(C) = 0.26$

If one person is selected from each city, what is the probability that all of them are under 18?

Since the three people are independent:

$P(A \cap B \cap C) = 0.235*0.258*0.26 = 0.0158$

0.0158 = 1.58% probability that all of them are under 18.

8 0

3 years ago

How do you create a model of 15% of 60

Misha Larkins [42]

The answer is 9 by the way. Draw a circle with sixty slices, shade in 15% or 9 slices.

6 0

3 years ago

The sum of two numbers is 156. The first number is six more

Zigmanuir [339]

Answer:

Let A equal the first number

Let B equal the second number

A=4b+6

B=b

4b+6+b=156

Step-by-step explanation:

Hope this helps :) Have a great day!!!!

3 0

3 years ago