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klemol [59]
3 years ago
5

Homework help!!!!!!!!

Mathematics
2 answers:
Feliz [49]3 years ago
4 0

Answer:

u=-1

Step-by-step explanation:

if you replace with a or b the answer on the left side is actually bigger since it is closer to 0 than -20. same with choice d

choice c makes -12-28 which is a smaller value than -20

kaheart [24]3 years ago
4 0
the answer is u= -1

-
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Sue solved an equation below. Check her work.
wolverine [178]

Answer:

You cant see the equation

Step-by-step explanation:

4 0
3 years ago
Assume that 140 surveys are completed. Of those surveyed, 71 responded positively to effectiveness, 60 responded positively to s
liraira [26]

Answer:

15

Step-by-step explanation:

Let n(T) denotes total surveys done i.e. n(T)=140

Let n(A) be the no. of responses to positively to effectiveness i.e. n(A)=71

Let n(B) be the no. of side effects i.e.n(B) =60

Let n(C) be the no. of responses to cost i.e. n(C)= 65

33 responded positively to both effectiveness and side effects

So, n(A∩B)=33

31 to effectiveness and cost

n(A∩C)=31

28 to side effects and cost

n(B∩C)=28

21 to none of the items

So, n(A∪B∪C)=140-21 = 119

we are supposed to find ow many responded positively to all three i.e. n(A∩B∩C)

Formula:

n(A∪B∪C)=n(A)+n(B)+n(C)-n(A∩B)-n(A∩C)-n(B∩C)+ n(A∪B∪C)

119=71+60+65-33-31-28+ n(A∪B∪C)

119=104+ n(A∪B∪C)

119-104= n(A∪B∪C)

15= n(A∪B∪C)

Hence 15 responded positively to all three

7 0
3 years ago
2x−(3x−4)=3x−5. pls solve
leva [86]

Answer:

x=9/4

Step-by-step explanation:

Performing the indicated multiplication, we get

2x - 3x + 4 = 3x - 5

Combining the x terms, we get -4x = -9, so that x = 9/4.

3 0
3 years ago
According to her running log, Camille averaged 4 miles per week last month and 50% more this month. How much did she average thi
Leya [2.2K]

Answer:

6 miles?

Step-by-step explanation:

4miles right so what is half of 4, 2 right. So that would be 50% of 4. You add 2 to 4 nd get 6. I am try to give my brain a push. I am using logic so yeah. I tried to help. I hope that this is correct. :)

8 0
3 years ago
2x + 6 = x – 1<br> Real solutions
pogonyaev

Answer:

x = -7

Step-by-step explanation:

2x+6 = x-1

add -6 to both sides

2x = x-7

add -x to both sides

x = -7

6 0
3 years ago
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