4 years ago

What does -3(n+5)=12 equal

Mathematics

1 answer:

Reil [10]4 years ago

6 0

Answer:

n= -9

Step-by-step explanation:

-3 ( n+5 ) = 12

-3n - 15 = 12

-3n = 12+15

-3n = 27

n = -27/3

n = -9

You might be interested in

A number,Y,is 2 less than half of a number X

zhenek [66]

Answer: y = 0.5x - 2

Step-by-step explanation: 0.5x = half of a number X

8 0

3 years ago

Twenty-four is 30% of what number?

IgorLugansk [536]

24 / 30 x 100 = 80

answer: <span>Twenty-four is 30% of 80</span>

7 0

3 years ago

Read 2 more answers

n a group of 40 people, 10 people are healthy. The 30 unhealthy people have either high blood pressure, high cholesterol, or bot

aalyn [17]

Answer:

If a person is randomly selected from this group, the probability that they have both high blood pressure and high cholesterol is P=0.25.

Step-by-step explanation:

We can calculate the number of people from the sample that has both high blood pressure (HBP) and high cholesterol (HC) using this identity:

$N(\text{HBP or HC})=N(\text{HBP})+N(\text{HC})-N(\text{HBP and HC})\\\\\\ N(\text{HBP and HC})=N(\text{HBP})+N(\text{HC})-N(\text{HBP or HC})\\\\\\ N(\text{HBP and HC})=15+25-30=10$

We can calculate the probability that a random person has both high blood pressure and high cholesterol as:

$P(\text{HBP and HC})=\dfrac{10}{40}=0.25$

3 0

3 years ago

There are 108 flights from an airport, 20 of which are longer than 3 hours.

dybincka [34]

Total flights = 108
Flights which are longer than 3 hours = 20

Probability = 20/108 = 5/27

Hope it helps!

4 0

3 years ago

A high school principal selects senior students to plan a high-school dance. Identify the population. Identify the population. A

raketka [301]

Most of the population would be A. Seniors, because mostly Seniors attend to dances.

5 0

3 years ago