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tresset_1 [31]
3 years ago
12

What is sarah is twice as old as her youngest brother. if the difference between their ages is 15 years. how old is her youngest

brother?
Mathematics
1 answer:
r-ruslan [8.4K]3 years ago
5 0
Her youngest brother is 15 years old.
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Given that y varies directly with x in the table below, what is the value of y if the value of x is 7?
Black_prince [1.1K]
Write out the governing equation:

y = kx.

Take any point from the given table.  You haven't shared the table, so I will invent a point:  (2, 9).

Then find k:  k = 9/2        Then the equation becomes   y = (9/2)x.

Now let x = 7 and find y:                           y = (9/2)(7) = 63/2     

Answer:         y = 63/2
6 0
3 years ago
Read 2 more answers
a collector has 80 jackeys and 125 shirts she wants to maintain ratio in her collection but she needs to sell some of her items
Irina18 [472]

Answer:

25

Step-by-step explanation:

Well, we need to simplify this. we have a ratio of 80:125.

As these numbers end in either 0 or 5, we know they are divisible by 5.

By dividing these by five, our ratio becomes 16:25.

As we have 16 jackets, we know we must need to sell 25 jackets to maintain the ratio.

8 0
3 years ago
Please Help!!
melamori03 [73]

Answer:

34 rolls

Step-by-step explanation:

For Frank to cover his whole ceiling, he needs paper that will cover

20 ft x 20 ft                      

20 x 20 = 400 ft

So, Frank needs to cover 400 ft of the ceiling. He has to split up this large need for paper into smaller rolls, because the rolls he can buy are small.

If each roll has 12 ft, we need to find how many 12-feet are in 400 feet.

To do this, we should divide

400 / 12

= 33.333

Because Frank cannot cover the whole ceiling using only 33 rolls, he has to buy an additional roll to make sure he can cover the extra area [that would be left over if he were to only buy 33 rolls, which would only cover 396 feet]

So, Frank will need to buy 34 rolls to have enough paper to entirely cover his ceiling.

6 0
2 years ago
Calculate the product 78.93 times 32.45
Alona [7]

Answer:

2561.2785

Step-by-step explanation:

7 0
2 years ago
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. Solve for x.<br> x – 2 = 30
nadya68 [22]

Answer:

X=32

Step-by-step explanation:

32-2=30

6 0
2 years ago
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