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3 years ago

What is the solution? Please show your work. 4x+5y=70 3x-2y=18

Mathematics

1 answer:

pishuonlain [190]3 years ago

5 0

Answer:

(x,y)=(10,6)

Step-by-step explanation:

Substitute the value of x into the equation {4x+ 5= 70

{x= 6+ 2/3y

solve the equation 4(6+2/3y) +5y = 70

substitute the value of y into the equation y=6

solve the equation x=6 + 2/3 times 6

A possible solution is x= 10

Check the solution (x,y) = (10 ,6)

Simplify {4 times 10 + 5 times 6 =7

{3 times 10 - 2 times 6 = 18

The ordered pair is a solution {70 = 70

{18 =18

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Hello! Lets solve this :)
So for the first question :
h(t) = -16t^2 + 150
h(0)= -16 (0)^2 + 150
h(0)= -16(0) + 150
h(0)= 0 + 150
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Second question
We need to find here the time when the ball hit the ground; or when the height h(t) is 0.
In equation form
h(t) --> 0=16t^2 + 150
16t^2 = 150
t^2=150/16
t= <span>√150/16
t= 5</span><span>√6/4
t= 5 (2.45)/4
t= 3.06 seconds
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Hope this helps! If you have any other questions or would like further explanation just let me know! :)

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3 years ago