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Nezavi [6.7K]
3 years ago
6

-3x +2y= 4 4x-13y=5 solve by elimination

Mathematics
1 answer:
Svet_ta [14]3 years ago
4 0
I am better at substitution, but you want to get the equations as similar as possible, but are the opposite, so you can cancel it out.

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A spherical tank holds about 7,234.56 cubic meters of air.
Inessa [10]

Answer:

The radius of the spherical tank is 12 meters

Step-by-step explanation:

In this question, we are tasked with calculating the radius of the spherical tank given the volume of air it can hold

Mathematically, the volume V of a sphere is 4/3 * pi * r^3

Thus, 7234.56 = 4/3 * 3.14 * r^3

7,234.56 = 4.19 * r^3

r^3 = 7234.56/4.19

r^3 = 1,728

r = cube root of 1,728

r = 12 meters

8 0
3 years ago
Solve the following system by the comparison method.
agasfer [191]

Answer:

2p + q = 1

9p + 3q + 3 = 0

q = 1 - 2p

replace q = 1 - 2p into 9p + 3q + 3 = 0

9p + 3(1 - 2p) + 3 = 0

9p + 3 - 6p + 3 = 0

3p + 6 =0

3p = -6

p = -2

q = 1 - 2p

q = 1 -2(-2)

q = 1 + 4

q = 5

(-2 , 5)

there for the answer would be

{(-2, 5)}

Hopefully this was helpful <3 :3

5 0
3 years ago
Suling bought 3meters of ribbons she used 5/6meter to make a bow find the length of the ribbon left
Ostrovityanka [42]
Subtract the portion used from the whole.

= 3 m - 5/6m
must have common denominators
= (3*6)/(1*6) - 5/6
= 18/6 - 5/6
= 13/6 m
= 2 1/6 m

ANSWER: 2 1/6 meters left

Hope this helps! :)
5 0
4 years ago
What is the simplified form of k-5+7
ohaa [14]

Answer:

k+2 or k=2

Step-by-step explanation:

combine -5 and 7 to get your answer

4 0
3 years ago
Read 2 more answers
Use matrices to determine the coordinates of the vertices of the rotated figure. with vertices MNP M(-2, 6), N(7,1), and P (4,-3
ioda

Answer:

The coordinate of image triangle is M(-6,-2),N(-1,7) and P(3,4)

Step-by-step explanation:

7 0
3 years ago
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