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3 years ago

13

On a multiple choice test, each question has 7 possible answers. If you make a random guess on the first question, what is the p

robability that you are correct? a. 1 b. 7 c. 1/7 d. 0

1 answer:

valkas [14]3 years ago

4 0

Answer:

c (1/7)

Step-by-step explanation:

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A bag contains 5 2/5kg of sand. The bag has a hole in it. Every 10 minutes, 1 2/3kg of sand escapes from the bag. After 20 minut

fenix001 [56]

Quantify of sand in a bag =

$= \: 5 \frac{2}{5} \ \:$

$= \frac{(5 \times 5 +2) }{5}$

$= \frac{27}{5} \: kg$

Quantity of sand that escapes in every 10 minutes :-

$= 1 \frac{2}{3} kg$

Quantity of sand that will escape in 20 minutes :-

$= 1 \frac{2}{3} \times 2$

$= \frac{(3 \times 1 + 2)}{3} \times 2$

$= \frac{5}{3} \times 2$

$= \frac{10}{3}$

Quantity of sand that will remain in the sand bag :-

$= \frac{27}{5} - \frac{10}{3}$

$= \frac{(27 \times 3)}{15} - \frac{(10 \times 5)}{15}$

$= \frac{81}{15} - \frac{50}{15}$

$= \frac{31}{15}$

$= 2 \frac{1}{5} \: kg$

$therefore \: , \: 2 \frac{1}{5} \: kg \: sand \: is \: left \: in \: the \: bag \: .$

3 0

3 years ago

Don't be childish I will report thanks

Semenov [28]

Answer:

what do you mean childish?.. anyway your answer is

-2| 3 - 6 |

= -6

happy to help!

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2 years ago

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Use the equation y=3x-8 to find y when x=8

Stels [109]

Answer: X = 8/3

Step-by-step explanation:

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2 years ago

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How do you find the area of a circle?

sveta [45]

Answer:

A=πr^2

Step-by-step explanation:

A=Area

r=Radius

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The ratio of boys and girls at the beach cleanup was 7:8. If there were 42 boys, how much girls were there

ratelena [41]

Answer:

48 girls

Step-by-step explanation:

Divide 42 by 7 and then multiply the answer by 8. So 42/7 is 6 and 6 multiplied by 8 is 48 so if there are 42 boys there are 48 girls.

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3 years ago