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ivann1987 [24]
3 years ago
13

The sum of two numbers is 39. Their difference is 21. What are the two numbers?

Mathematics
2 answers:
Yanka [14]3 years ago
6 0

Answer:

30 and 9

Eeexplination;

mrs_skeptik [129]3 years ago
4 0

Answer:

30 and 9

Step-by-step explanation:

x+y=39 , x-y=21

Solve for x:

x+y=39 , x-y=21

x= 30

Substitute x with 30:

(30)+y=39 , (30)-y=21

Solve for y:

y=9

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Strike441 [17]
(not sure )
my method
let projection of b onto line dq be M
BM is 2r
then let the remaining angle ( right) be K
in triangle BMK ,
MK = 29-5-r
By Pyth. theorem ,
23^2 = (2r)^2+(29-5-r)^2
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5 0
3 years ago
Name the property illustrated by each statement:
aniked [119]

both are correct.

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8 0
3 years ago
An oblique cylinder has a radius of 8 inches and a volume of 1,024 cubic inches. Use Cavalieri’s Principle to calculate the heig
enot [183]
Remark
All Cavaliere's principle says is that a slanted cylinder (for example) has the same volume as a cylinder with perpendicular parallel lines that the cylinder is sitting on.

I little known or maybe not a well emphasized fact is that the base is the same all the way up the cylinder. The coin picture below shows that. The basic formula for a Cavaliere cylinder is the same as for an ordinary cylinder.

See picture below

Formula
V = B * H 

Sub and Solve
V = 1024
r = 8
p=3.14

V = pi*r^2 * h
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1024 = 3.14*64 *h       
1024 = 200.96 * h       divide by 200.96
1024/200.96 = h
You are only getting 5 inches.

None of your answers work.The conversion to meters is going to give you an even smaller number. If you add a comment, I'll come back and edit this question.

5 0
3 years ago
Lydia invested $8,300 in an account paying an interest rate of 2.2% compounded
Dennis_Churaev [7]

Answer:

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Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
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KiRa [710]
Factor the numerator and denominator and cancel the common factors.
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6 0
3 years ago
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