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anzhelika [568]
3 years ago
8

a boy is older than his sister by 3 years five years ago, the ratio of their ages was 4 : 3 find his present.​

Mathematics
2 answers:
pashok25 [27]3 years ago
8 0
B:S = 4x:3x
4x - 3x = 3
x = 3
They were 12 & 9.
Add 5 to that.
So he’s now 17 and she’s 14
AnnZ [28]3 years ago
8 0

Answer:

five years ago -- boy-   x+3 years

                           sister ---  x

ratio-- 4:3  so difference is 3 years

4-3-- 1   1--3

five years ago ---  sister  :3*3--9   brother : 4*3--12

present : sister 14 years and brother 17 years old

 

Step-by-step explanation:

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Plz help and include an explanation, will mark brainliest
kow [346]

Answer:

160 T-shirts

Step-by-step explanation:

7,200/45=160

3 0
3 years ago
Read 2 more answers
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viva [34]
109 with a remainder of 6
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7 0
3 years ago
16x 2 + 8x - 15 Mathematics?
Gala2k [10]
If you're factoring, your answer is

(4x - 3)(4x + 5)

You'll work it out this way:

16x^2 + 8x - 15

Since there's no GCF here, you multiply the first and third terms, giving you -240. Your next step is to find two numbers that have a sum of 8 and a product of -240. These numbers are 20 and -12. Plug those in and you've got:

16x^2 + 20x - 12x - 15

From here you divide it into two binomials. These are (16x^2 + 20x) and (-12x - 15).
When you take out the greatest common factors (4x and -3), they become:

4x(4x + 5) - 3(4x + 5)

Then you group what's outside of the parentheses together (4x - 3)
And bring what's inside of the parentheses down (4x + 5).
This brings your answer to

(4x - 3)(4x + 5)
5 0
3 years ago
The total number of people who visitedthe ocean adventure park last year was 7,040,836 . What is the valur of the digit 4 in thi
Vesna [10]
The total number of people who visitedthe ocean adventure park last year was 7,040,836

In 7,040,836, there are FOUR digits after 4.

To find value of 4, just put FOUR zeroes after 4

Thus, Value of 4 = 40000
5 0
3 years ago
Find volume of the specified cone use 3.14 round number to the nearest whole number radius 9 in ,height 8 in
mixas84 [53]

Answer:

678 cu. in.

Step-by-step explanation:

hope this helps!

6 0
3 years ago
Read 2 more answers
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