Brainilest!!! 50pts Solve for x and y 45x+(-326y)=96 666x-777y=420
2 answers:
Equalization
X = (96 + 326Y)/45 (1)
X = (420 + 777Y)/666 (2)
(96 + 326Y)/45 = (420 +777Y)/666
666(96 + 326Y) = 45(420 + 777Y)
63936 + 217116Y = 18900 + 34965Y
217116Y - 34965Y = 18900 - 63936
182151Y = -45036
Y = -45036/182151
Y = - 2²*3⁴*139/3²*37*547 = - 2² * 3² * 139/37 * 547 = -5004/20239 = -0,2472
This is value of Y = -0,2472 approximately
Now we substitute this value in the equation (1)
45X = 96 + 326*-5004/20239
45X = 96 - 1631304/20239
45X = (20239*96 - 1631304)/20239
45X = (1942944 -1631304)/20239
45X = 311640/20239
X = 311640/20239*45 = 311640/910755 = 2³ * 3 * 5 * 7² * 53 / 3² * 5 * 37 * 547 =
X = 2³ * 7² * 53 / 3 * 37 * 547=
X = 20776 / 68717 = 0,3422
This is the value of X = 0,3422 approximately
ANSWER X = 20776/68717 = 0,3422 approximately
and Y = -5004/20239 = -02472 approximately
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Answer:
The height of the water = 6.2 in. to the nearest tenth
Step-by-step explanation:
∵ The rate of flows of water into the tank = 8000 in.³/min.
∴ The volume of the water in the tank after 10 min. = 8000 × 10 = 80000 in.³
∵ The water take the shape of the tank
∴ The height of the water = volume of water ÷ Area of the base of the tank
∵ The tank is cylinder with diameter 128 in. and height 72 in.
∴ The area of the base of the tank = π(128/2)²
∴ The height of the water =
∴ The height of the water = 6.2 in. to the nearest tenth