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givi [52]
3 years ago
8

The sum of three numbers is 21. Three times the smallest is 3 less than the largest, while the sum of the largest and smallest i

s 15. Use linear system in three variable to find the three numbers

Mathematics
2 answers:
Lynna [10]3 years ago
7 0
3, 6, 12
I guessed and checked. So if 3 is the smallest number, I would, multiply it by 3, which is 9. 9 is 3 less than the largest number which would be 12. 12 + 3 is 15. To find the third number, subtract 21 and 15 which is 6
nordsb [41]3 years ago
3 0
One of the numbers is 6.
The other is 12.
The last is 3.

Difficult, but not impossible!
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Solve for x <br>x- 2x (12 - 1/2) =2 (4-2x) +20<br>A.-14/9<br>B.-9/14<br>C.14/9<br>D.9/14​
MrMuchimi

Answer:

A

Step-by-step explanation:

-22x=-4x+28

-18x=28

x=-28/18=-14/9

7 0
3 years ago
Can someone help me with these two? Please
avanturin [10]
For 16/18 it would be 8/9
For 10/15 it would be 2/3
4 0
2 years ago
Read 2 more answers
Find the volume of a cone with a base radius of 3 cm and a height of 9 cm
katovenus [111]

The volume of a cone is 84.78 cm                

<u>Step-by-step explanation</u>:

<u>Given</u>:

radius = 3 cm and

height = 9 cm

<u>To Find</u>:

The Volume of a Cone

<u>Formula</u>:

The Formula for the volume of a cone is

V=πr2 *h/3

<u>Solution</u>:

V=πr2 *h/3

π value is 3.14

V= 3.14*(3)^2*9/3

V=3.14*9*3

V= 84.78 cm

Therefore the volume is 84.78 cm.

5 0
4 years ago
Paul bought 18 pins for $90. Jack bought 45 pins for $180. Who bought pins at the lowest cost?
lina2011 [118]

Answer:

Jack

Step-by-step explanation:

90/18 = 5

180/45 = 4

3 0
3 years ago
Read 2 more answers
Doheney bake sale 1 1/2 dozen cookies were sold in 1/3 hour what is the unit rate for the dozens of cookies sold per hour
netineya [11]
1/3 hour = 20 minutes


1 1/2 dozen = 12 + 6 = 18 cookies

18 cookies x 3 (3 sets of 20 minutes = 1 hour) = 54 cookies per hour
5 0
3 years ago
Read 2 more answers
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