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denis-greek [22]
3 years ago
6

Two numbers are in the ratio 7:5 and their difference is 22.Find the numbers​

Mathematics
1 answer:
omeli [17]3 years ago
4 0

Answer:

Let x and y be the two numbers. Then

yx=57  and x−y=20

Cross multiplying the proportion

5x=7y  or y=75x

So, x−y=20

x−75x=20⇒77x−5x=72x=20

⇒x=2140=70

y=75x=75×70=50

So smaller number is 50.

Check :yx=5070=57 and 70−50=20

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I'm struggling in this subject so if you'd give a step-by-step explanation that'd be great thx​
defon
A. First you must start by plugging in your equation solve Y = 2(5) + 1 then you must simplify by solving your 2×5+ 1 and then you end up with Y equals 11

B. Again plug in your equation Y = 2(-5) + 1 then you must simplify by solving your 2×-5+ 1 and then you end up with Y equals -10+ one which simplifies to y = -9

I hope this helps
8 0
2 years ago
Read 2 more answers
Please Assist With This Equation<br><br>*Please Show Work*​
Tomtit [17]

Answer:

240 hours

Step-by-step explanation:

One person hour is a unit indicating the rate at which one person is working on the project .

The company estimates that it will take 2880 person- hours to complete the job

So let's determine how many hours it will take 12 workers to complete same job

The rate = 2880 person/hour

12 persons or workers =( 2880 person/hour)/12 persons

12 persons or workers = 2880/12

12 persons or workers=240 hours

It will take 12 workers 240 person hour to finish the project.

Thank you

8 0
3 years ago
Simplify ( 1/2A + 1/2B )^2
zysi [14]
Notice that both A and B are multiplied by (1/2).

Thus, the given expression can be re-written as [(1/2)(A+B)]^2.

Square the (1/2) and the (A+B) separately, and then multiply together the resulting squares:

(1/4)(A^2 + 2AB + B^2)

4 0
2 years ago
Read 2 more answers
Simplify the following expression. log(x2) - log(x)
nadya68 [22]
Bc. log a - log b = log (a/b) than use this formula will get 

log x^2 -log x = log (x^2 /x) = log x so choice D. is right sure 

hope helped 
6 0
3 years ago
Noah bought 15 baseball cards for $9.00. Each baseball card costs the same amount. How much will 12 baseball cards cost
denis-greek [22]
15 cards = 9$

1 card = (9/15)$

12 cards = 9/15 * 12

= 108/15

= 7.2$
6 0
3 years ago
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