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Montano1993 [528]
3 years ago
5

In a 3 hour examination of 350 questions, there are 50 mathematics problems. if twice as much time should be allowed for each ma

thematics problem as for each of the other questions, how many minutes should be spent on the mathematics problems?
Mathematics
1 answer:
Margarita [4]3 years ago
3 0

Answer: 7 minutes

Step-by-step explanation:

350/50=7

3*2.3333=7

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he has 14 coins and 2 one-dollar bills. witch describes the relationship between the coin and the dollar bills?
polet [3.4K]

Answer:

14:2

Step-by-step explanation:

1 coin is one part, one bill is one part

14:2

5 0
3 years ago
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there are 3 black marbles in and 4 red marbles in a bag. what is the probability that you will pick two black marbles put of the
professor190 [17]

|\Omega|=7\cdot6=42\\ |A|=3\cdot2=6\\\\ P(A)=\dfrac{6}{42}=\dfrac{1}{7}\approx14\%

5 0
3 years ago
Explain why 3/4 of 16 is the same as 3 x 16 divided by 4<br> Please Help
pogonyaev

Answer:

<em>I know that 3/4 is 75%, and I also know that 3 times 16 is 48. Since I divide 48 by 4, it is the same as multiplying 4 by 3, knowing that it is 25% of 16.</em>

Step-by-step explanation:

Since 3/4 is a fraction, all fractions can be converted into decimals.

3/4 is also known as 75%, which can be simplified into 0.75 in decimal terms.

Now that you know that 3/4 can be simplified to 0.75, you now need to take that 0.75, and multiply it by 16. You can use a calculator to do this, or you could work it out on a sheet of paper.

An easy way to do this, is to know that 25%, (0.25) of 16 is 4. This is because 4 times 4 is 16. Knowing this, if you are looking for 75% of 16, (0.75) you can multiply 4 by 3, knowing that it is 75% of 16.

The answer to that is 12.

3 x 16 = 48 and if you take 48 and divide it by 4, you will get 12.

You can explain this by writing; <em>I know that 3/4 is 75%, and I also know that 3 times 16 is 48. Since I divide 48 by 4, it is the same as multiplying 4 by 3, knowing that it is 25% of 16.</em>

7 0
3 years ago
2xy when x = 5 and y = -3
Stels [109]

Answer:

the answer is -30

Step-by-step explanation:

2xy=2*5*-3

= -30

5 0
3 years ago
One solution to the problem below is 5 what ya the other solution a^2-25=0
Alex

-5

a^2-25=0

a^2=25

take the square root of both sides

a=5, and -5

5 0
3 years ago
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