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-BARSIC- [3]
3 years ago
12

What is the solution to the following system of equations? y=6x-11 ////// -2x-3y=-7

Mathematics
2 answers:
jok3333 [9.3K]3 years ago
6 0
Y = 6x - 11
-2x - 3y = -7

Let's use substitution:

-2x - 3y = -7
-2x - 3(6x - 11) = -7
-2x - 18x + 33 = -7
-20x + 33 = -7
-20x = -40
x = 2

----

y = 6x - 11
y = 6(2) - 11
y = 12 - 11
y = 1

----

y = 6x - 11  =>  1 ? 6(2) - 11  =>  1 = 12 - 11  <--True
-2x - 3y = -7  =>  -2(2) - 3(1) ? -7  =>  -4 - 3 = -7  <--True

Answer:
x = 2
y = 1

Hope this helps!
Masja [62]3 years ago
4 0

Answer:

D. (2,1)

Step-by-step explanation:

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MAY DAY MAY DAY, HELP
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Have you heard the expressions "shooting fish in a barrel" or
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I've decided to take your points and try not to feel guilty about it.

A).  That's it !  That's the equation, for ANY basketball on Earth. 
You wrote it right there in your question.

In that equation that you wrote, the ' r ' is the initial velocity. 
You said that Adam tossed it straight up, and it was going 10 meters per second
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So ' r ' in the equation is +10.
The equation is:
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The ' t ' in the equation is the number of seconds.  Any letter could have been used,
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Well, OK.  You're being so overly generous with your points . . .

         Distance = 10 t - 5 t²

         Distance = 10 (0.5) - 5 (0.5)²

         Distance =     5       - 5(0.25)

         Distance =     5       -  1.25

         <em>Distance =        3.75 meters </em>

                                <u>positive</u> 3.75 means <u>above</u> Adam's hand. 

A thinking exercise:
-- He tossed the ball upwards at  10  meters per second.
-- Why is it not  5  meters above his hands after  0.5  second?


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