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Flauer [41]
3 years ago
9

Solve the system using elimination. 3x - 5y = 8 X - 5y = - 4

Mathematics
1 answer:
Goryan [66]3 years ago
6 0

Answer::.x=6,y=2

3x - 5y = 8......(1)

X - 5y = - 4......(2)

subtracting equation 2 from 1 we get

Step-by-step explanation:

3x - 5y = 8

X - 5y = - 4

-

------------------

2x=12

x=12/2=6

multiplying equation 2 by3 weget

3x-15y=-12........(3)

subtracting equation 1from 3

3x-15y=-12

3x-5y=8

-

------------------

-10y=-12-8

y=-20/-10=2

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A bag contains ten balls labeled 1 through 10. One ball will be randomly picked.
svetlana [45]

Answer:

I also have this same question.

Step-by-step explanation:

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6 0
3 years ago
Read 2 more answers
I need help, please!
Neporo4naja [7]

Answer:

2 of these numbers are divisible by 4 and 5.

20 and 60 are divisible by 4 and 5.

Step-by-step explanation:

20 is divisible by 4 and 5.

Divisible just means that the 4 (also the 5) goes into 20 evenly, with no remainder.

4 goes into 20 evenly with no remainder.

5 goes into 20 evenly with no remainder.

4 does not go into 35 evenly with no remainder.

35 ÷ 4 is 8 with a remainder of 3.

35 ÷ 4 = 8.75

5 does go into 35. 35 is divisible by 5.

35 is not divisible by 4.

60 is divisible by 4

60 ÷ 4 = 15 (no remainder, no extra decimals if you do it on a calculator)

60 ÷ 5 = 12 (no remainder, no extra decimals if you do it on a calculator)

60 is divisible by 4 and also by 5.

3 0
3 years ago
4. 8.G.3.9 <br> This cone and sphere have equal volumes. <br><br> What is the radius of the sphere?
lozanna [386]

Answer:

the radius of the sphere is 12 cm.

Step-by-step explanation:

IN A CONE

vertical height (h) = 27 cm

radius (r) = 32 / 2 = 16 cm

Now the volume of cone is

= 1/3 *h*π*r²

= 1/3 * 27 *π *16²

= 2304π cm³

Also by the question the cone and the sphere have equal volumes so

volume of sphere = volume of cone

                             = 2304 π cm³

OR, 4/3 πr³ = 2304 π

4/3 * r³ = 2304

r³ = 2304 * 3 / 4

r³ = 1728

r = ∛1728

r = 12 cm

hope it helps :)

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3 years ago
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