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kykrilka [37]
4 years ago
11

What is the probability of getting 60% or better on a true false exam with 50 questions

Mathematics
1 answer:
Ipatiy [6.2K]4 years ago
3 0

Answer:

41.1764...%

Step-by-step explanation:

60% on 50 questions is 30/50 correct since 30÷50=.6=60%

Between 30 and 50(inclusive) there are 21 numbers.(30,31,32...49,50).

There are 51 possibilities of scores,1-50/50 or 0/50

21/51=0.411764...

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Find the values of C for which C(x+2)—(x+2)(x–2)=0 has just one solution. please help me ASAP ​
CaHeK987 [17]
<h3>Answer:   C = -4</h3>

==================================================

Work Shown:

C(x+2) - (x+2)(x-2) = 0

(x+2)(C-(x-2)) = 0

(x+2)(C-x+2) = 0

x+2 = 0 or C-x+2 = 0

x = -2 or x = C+2

If we want one solution only, then we must make C+2 = -2 which solves to C = -4

If C = -4, then x = C+2 = -4+2 = -2 which matches with the first solution mentioned. If C is anything else but -4, then we'd have two different solutions (eg: C = 10 leads to x = C+2 = 12 as the other solution)

3 0
2 years ago
Please answer the question and tell me why if so tysm
Phantasy [73]

Answer:

<em>1, 2</em>

Step-by-step explanation:

For each value of x, f(x) is 2 less.

f(x) = x - 2

f(x) = 1x - 2

3 0
3 years ago
Read 2 more answers
Please help! Desperate. Will give brainiest
alisha [4.7K]
I think s NO 4 i hope that was help.
4 0
4 years ago
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6. What number is not a prime number or a perfect square that lies between
Serjik [45]
The number would be 22
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3 years ago
Alvin and Bala has 26 stickers.Alvin had 8 more stickers thab Bala.How many stickers did Bala have?​
Brilliant_brown [7]
Bala had 9 stickers

You could set this up as a equation. Because there was a total of 26 you would for sure put =26. Next you are told Alvin has 8 MORE than Bali, therefore you would be adding the unknown value of Bala by 8. This could be represented as x+8=26. Now that you have x added to 8 you need to add another x to the equation to fully represent the problem since Alvin has 8 more stickers than Bala does. The new equation would become 2x+8=26.

You must now isolate x by first subtraction 8 from both sides which will leave you with 2x=18. Then you divide on both sides by 2 and will leave you with x=9
3 0
4 years ago
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