f 5 + x = 12, and you add -5 to the left side of equation, what should you add to right side of equation?
1 answer:
Hi there! :)
<u><em>Answer:</em></u>
<em><u>x=7</u></em>
<em><u>*The answer must have a positive sign.*</u></em>
Step-by-step explanation:
<h2><u><em>Lesson: Addition/Subtraction/Multiplication/and Division property of equality</em></u></h2>First, you switch sides of an equation.
Then, you subtract by 5 from both sides of an equation.
You subtract by the numbers from left to right.
<u><em>Final answer is x=7</em></u>
I hope this helps you!
Have a nice day! :)
:D
-Charlie
Thank you! :)
:D
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Answer:
a) No. t < 0 is not part of the useful domain of the function
b) 2.0 seconds
Step-by-step explanation:
a) A graph of the function is shown below. It shows t-intercepts at t=-0.25 and t=2.0. We presume that t is measured forward from some event such as the ball being thrown or hit. The model's predicted ball location has no meaning prior to that event, when values of t are negative.
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b) It is convenient to use a graphing calculator to find the t-intercepts. Or, the equation can be solved for h=0 any of several ways algebraically. One is by factoring.
h = 0 = -16t² +28t +8 . . . . . . . . . . . . the ball hits the ground when h = 0
0 = -4(4t² -7t -2) = -4(4t +1)(t -2)
This has t-intercepts where the factors are zero, at t=-1/4 and t=2.
The ball will hit the ground after 2 seconds.
