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Julli [10]
3 years ago
11

5x - 2y = 142x + 2y = 14[by elimination]​

Mathematics
1 answer:
kenny6666 [7]3 years ago
4 0

Answer:

x=4, y =3

Step-by-step explanation:

5x - 2y =14

2x +2y =14

Remains

5x +2x =14+14

7x=28

x=28 :7

x=4

Now we go to the first equation

5×4 - 2y =14

20 - 2y =14

-2y =14-20/×(-1)

2y =6

y=6 :2

y=3

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Find the volume of the composite figure below.
worty [1.4K]

Answer:

Volume of composit figure= 4834.14 cm^3

Step-by-step explanation:

here's your solution

=> Radius of hemisphere = 9 cm

==> volume of hemisphere = 2/3πr^3

==> volume of hemisphere = 2/3*22/7* 9^3

==> volume = 1526.04 cm^3

=> Radius of cylinder = 9 cm

=> Height of cylinder = 13 cm

==> volume of cylinder = πr^2h

==> volume of cylinder = 22/7*9^2*13

==> volume of cylinder = 3,308.1 cm^3

Volume of composit figure = 1526.04 + 3308.1

= 4834.14 cm^3

hope it helps

7 0
2 years ago
A car is 160 inches lorrg.
Andreyy89
The truck is 171.2%. if you calculate the percentage of 160 and add them together, you will get 171.2
7 0
2 years ago
What is the area and perimeter of this triangle
Fynjy0 [20]

Answer:

P= 221cm

A=2044

Step-by-step explanation:

Perimeter : add all sides so 73+92+56= 221 cm

Area: 73(56/2)= 2044

7 0
3 years ago
Read 2 more answers
What was the error in this equation?
PtichkaEL [24]

Answer:

The error is the solution.

The solution is all real numbers, or infinite amount of solutions.

Step-by-step explanation:

Step 1: Write equation

-4(2n - 3) = 12 - 8n

Step 2: Solve for <em>n</em>

  1. <u>Distribute -4:</u> -8n + 12 = 12 - 8n
  2. <u>Subtract 12 on both sides:</u> -8n = -8n
  3. <u>Add 8n to both sides:</u> 0 = 0

Here we see that <em>n</em> can equal any number. If you plug in any number <em>n</em>, it will render the equation true. Therefore, our solution is n = infinite amount of solutions.

n = 0 is only slightly correct. 0 does work as the solution, but there are solutions as well.

3 0
3 years ago
What is the first operation used in solving this equation 2x + 5 = 10
vovikov84 [41]
Subtraction. you subtract 5 from both sides.
8 0
3 years ago
Read 2 more answers
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