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OlgaM077 [116]
3 years ago
7

What is the probability that she gets exactly 4 or exactly 5 questions right?

Mathematics
1 answer:
lions [1.4K]3 years ago
7 0
Probability that the questions are answered corectly1/4 = 0.25
probability that they are answered wrong 3/4 = 0.75
probability that 4 out of 7 are corect 7C4(0.25)4(0.75)3  which equals  0.0577
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Can someone help with this Algebra? pls will mark Brainlist<br> -7x -3x + 2 =8x -8
OLga [1]

Answer:

x=0.55

Step-by-step explanation:

-7x -3x + 2 =8x -8

-10x+2=8x-8

2+8=8x+10x

10=18x

10/18=x

x=0.55

5 0
3 years ago
Read 2 more answers
20 in
alukav5142 [94]

Answer:

C

Step-by-step explanation:

This question can simply be answered by the process of elimination. All of the other answers have numbers behind the first number of the decimal. when you are rounding to the nearest tenth, you will have no numbers behind the decimal except 1. They will look like this:

11.70

23.30

45.60

So, since we are looking for the nearest tenth, we would choose C because it is the only one that is rounded.

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3 years ago
At a local grocery store, hamburger meat is normally $3.50 per pound, but this week hamburger meat is on sale for $2.10 per poun
AysviL [449]

Answer:

I think it would be a 1.40 decrease

Step-by-step explanation:

8 0
3 years ago
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What’s the answers for 1 and 2?
dusya [7]

Answer:

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Write the following in interval notation:
elena-14-01-66 [18.8K]

Answer:

10/13 ≤ x < 18/13

Step-by-step explanation:

-1 ≤ 13x - 11 < 7

If a ≤ u < b then a ≤ u and u < b

⇒ -1 ≤ 13x - 11  and  13x - 11 < 7

-1 ≤ 13x - 11

Add 11 to both sides:  10 ≤ 13x

Divide both sides by 13:  10/13 ≤ x

13x - 11 < 7

Add 11 to both sides:  13x < 18

Divide both sides by 13:  x < 18/13

Combine the intervals

10/13 ≤ x < 18/13

5 0
3 years ago
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