−1.5(4−n)+2.8 how to solve this problem

2 answers:

7 0

To solve this problem,all you can do is simplify. First use the distributive property:

-1.5 * 4= -6
-1.5* n= -1.5n
now you should have this:

-6-1.5n+2.8

Now combine like terms:

-6+2.8= -3.2

Now you have simplified it as much as you can:

-3.2-1.5n is your answer.

melisa1 [442]3 years ago

3 0

3.2n is your answer for number of ns

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How do you solve 2w-10=20

Aloiza [94]

2w-10=20

Add 10 to both sides

2w=30

Divide both sides by 2

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4 years ago

In a statistics class there are 18 juniors and 10 seniors; 6 of the seniors are females and 12 of the juniors are males. If a st

White raven [17]

Answer:

a) 0.857

b) 0.571

c) 1

Step-by-step explanation:

Based on the data given, we have

18 juniors
10 seniors
6 female seniors
10-6 = 4 male seniors
12 junior males
18-12 = 6 junior female
6+6 = 12 female
4+12 = 16 male
A total of 28 students

The probability of each union of events is obtained by summing the probabilities of the separated events and substracting the intersection. I will abbreviate female by F, junior by J, male by M, senior by S. We have

P(J U F) = P(J) + P(F) - P(JF) = 18/28+12/28-6/28 = 24/28 = 0.857

P(S U F) = P(S) + P(F) - P(SF) = 10/28 + 12/28 - 6/28 = 16/28 = 0.571

P(J U S) = P(J) + P(S) - P(JS) = 18/28 + 10/28 - 0 = 1

Note that a student cant be Junior and Senior at the same time, so the probability of the combined event is 0. The probability of the union is 1 because every student is either Junior or Senior.

3 0

3 years ago

Simplify the expression: –9w+–6w+10w+8w

Y_Kistochka [10]

Final Answer: $3w$

Steps/Reasons/Explanation:

It is common addition and subtraction because they all have w after the number. This means they are the same variable. A plus minus (+-) would be a minus (-).

Question: Simplify the expression: $-9w +- 6w + 10w + 8w$ .