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faltersainse [42]
3 years ago
5

A student ran out of time on a multiple choice exam and randomly guessed the answers for 2 problems. Each problem had 5 answer c

hoices -a,b,c,d,e and only one correct answer. What is the probability that she answered both of the problems correctly
Mathematics
1 answer:
frozen [14]3 years ago
3 0
So if there are 5 choices and only one is correct, there is a 1/5 chance of being correct. since there was 2 questions, you need to multiply 1/5 by 1/5 to get 2/25 of getting both questions correct.

i hope this helps!!
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-4 (r + 2) = 4 (2 - 2r)
Nady [450]

Answer:

r=4

Step-by-step explanation:

Let's solve your equation step-by-step.

−4(r+2)=4(2−2r)

Step 1: Simplify both sides of the equation.

−4(r+2)=4(2−2r)

(−4)(r)+(−4)(2)=(4)(2)+(4)(−2r)(Distribute)

−4r+−8=8+−8r

−4r−8=−8r+8

Step 2: Add 8r to both sides.

−4r−8+8r=−8r+8+8r

4r−8=8

Step 3: Add 8 to both sides.

4r−8+8=8+8

4r=16

Step 4: Divide both sides by 4.

4r

4

=

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4

r=4

Answer:

r=4

3 0
3 years ago
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Luba_88 [7]

Answer:

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Step-by-step explanation:

because 8-4 is 4

8 0
3 years ago
Kate paid $27 for a dress that was on sale at 10% off. What was the original price for this dress?
Art [367]

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Step-by-step explanation:

5 0
4 years ago
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I don’t understand how to do this.
yan [13]

Answer:

46degrees

Step-by-step explanation:

From the question, we are told that both triangles are similar, hence;

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Since <E = <S, hence the measure of <S  is 46degrees

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mylen [45]
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