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Pavlova-9 [17]
3 years ago
15

What is the value of -5(–1 – 7)?

Mathematics
2 answers:
Afina-wow [57]3 years ago
4 0

Answer:

40

Step-by-step explanation:

1- combine the values in the parentheses. -1-7 is equal to -8.

2- multiply -5 by -8, the answer is 40 because two negatives multiplied together equals a positive.

trapecia [35]3 years ago
3 0
Answer is 40

-5(-1-7)
-5(-1 + -7). Keep change change
-5( -8)
40. Negative times negative equal positive
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Please help me on this problem
tester [92]

Answer:

79.5 in ^3

Step-by-step explanation:

5 times 8 times 2.

40 times 2 equals 80.

2 times 1 times .25 equals .5

80-.5 equals 79.5 in^3

3 0
3 years ago
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A state end-of-grade exam in American History is a multiple-choice test that has 50 questions with 4 answer choices for each que
Assoli18 [71]

Answer:

Q1) The student has a 0.01% probability of passing the test.

Q2) She has a 99.91% probability of passing in the test.

Step-by-step explanation:

For each question, there are only two possible outcomes. Either he gets it correct, or he gets it wrong. So we solve this problem using the binomial probability distribution.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.\pi^{x}.(1-\pi)^{n-x}

In which C_{n,x} is the number of different combinatios of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And \pi is the probability of X happening.

For this problem, we have that:

Question 1.

There are 50 questions, so n = 50.

The student is going to guess each question, so he has a \pi = \frac{1}{4} = 0.25 probability of getting it right.

He needs to get at least 25 question right.

So we need to find P(X \geq 25).

Using a binomial probability calculator, with n = 50 and \pi = 0.25 we get that P(X \geq 25) = 0.0001.

This means that the student has a 0.01% probability of passing the test.

Question 2.

Now, we need to find P(X \geq 25) with \pi = 0.70. So P(X \geq 25) = 0.9991

She has a 99.91% probability of passing in the test.

7 0
3 years ago
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ivann1987 [24]
I think 121

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Subtract that and 121 is what’s left.
7 0
2 years ago
What is the answer to this?<br> Thank you
Andre45 [30]
7y+11+7y+11+7y+11=180(A.S.P)
21y+33=180
21y=180-33
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y=7
6 0
3 years ago
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I don't know what ten times 10 is?
Scrat [10]
I hope this helps you

?=10×10

?=100
6 0
3 years ago
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