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Scilla [17]
3 years ago
14

4) The sum of two numbers is 21. The smaller number is three more than half the larger number. What are the two numbers?

Mathematics
1 answer:
butalik [34]3 years ago
3 0

Answer:

4) smaller number is 9, larger number is 12

13) 38.45=5m+8.5

m=5.99

Step-by-step explanation:

x+y=21      the sum of two numbers is 21

x-3=.5y  the smaller number is 3 more than half the larger number

multiply both sides by 2 and you get 2x-6=y

plug that equation into the first equation and you get x+2x-6=21

simplifying you get 3x-6=21 add 6 to  both sides and you get 3x=27

x=9 so the smaller number is 9 then you plug that back into the first equation and get y=12


let m be the cost of 1 movie and c be the cost of the cd

38.45=5m+c

38.45=5m+8.5 this is the equation you use

subtract 8.5 from both sides and you get 29.95=5m

divide both sides by 5

5.99=m the answer

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3x-8y=24 <br> y=x-8<br> Please show <br> work
In-s [12.5K]

Answer:

3x - 8y = 24   --------(1)

y = x - 8  ---------(2)

substitute  y in (1)

3x - 8( x - 8) = 24

3x - 8x + 64 = 24

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4 0
3 years ago
Read 2 more answers
−4+8x)+3&gt;x−4?<br><br> x&gt;16<br><br> x&lt;−1<br><br> x&lt;−323<br><br> x&gt;433
pentagon [3]

Answer:

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Step-by-step explanation:

(-4 +8x) +3> x/-4

8x - 1 > x/-4

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6 0
3 years ago
Divide: (-7x+x^2+15)÷(-3+x)
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Take the coefficients of the terms and follow these steps:

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___________  Bring down the 1, multiply the 3 by the 1 and place under the
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The bottom row are the coefficients of the terms and the last number is the remainder.
x - 4 remainder 3 ALSO WRITTEN   x - 4 + 3/(x -3)
3 0
3 years ago
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