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mojhsa [17]
3 years ago
5

Helen is taking part in a quiz on tv. The Probability she answers the questions correctly is 4/5. Helen is asked two questions.

Calculate the probability she answered both questions correctly
Mathematics
1 answer:
mina [271]3 years ago
6 0

Answer:

16/25

Step-by-step explanation:

To find the probability that she gets both questions right, multiply the probabilities together:

4/5 x 4/5

= 16/25

So, the probability that she answers both correctly is 16/25

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Answer:

42 Dimes, 10 Nickels.

Step-by-step explanation:

Dimes are worth $0.10, nickels are worth $0.05.

If D = number of dimes, and N = number of nickels, then the following equations are true:

0.10D + 0.05N = 4.70

D + N = 52

Next, let's multiply the first equation by 10 so that we can subtract the second one from it.

D + 0.50N = 47

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Subtracting the second equation from the first one gives:

-0.5N = -5

-0.5N/-0.5 = -5/-0.5

N = 10

Finally, substitute N in the original second equation to find D.

D + 10 = 52

D + 10 - 10 = 52 - 10

D = 42

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3 years ago
If the length of a rectangle is 5a^2 and the width is 7ab^2 what is the area of the rectangle?
DanielleElmas [232]

Answer:

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Step-by-step explanation:

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3 years ago
Can you please help me with this.. you only have to do the first one (a)
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Step-by-step explanation:

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Step-by-step explanation:

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