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4 years ago

8

!100! POINTS PLEASE HELP ME BRAINLIEST!!!!!!!!!!!!

2 answers:

Allisa [31]4 years ago

7 0

This should be a basic system of equations problem
-------------
12x + 4y = 152
32x + 12y =420
-----------------------
First solve 12x + 4y = 152 for x
Add -4y to each side
<span>12x+4y+-4y</span>=<span>152+-<span>4y
</span></span>12x=-<span>4y+<span>152
</span></span>----------------------------
Divide each side by 12
12x ÷ 12 = $\frac{-4y+152}{12}$
x = -1/3y + 38/3
============================================================
Substitute -1/3y + 38/3 for x in 32x+12y=<span>420
</span>32(-1/3y + 38/3)+12y=420
-------------
Simplify each side
4/3y + 1216/3 = 420
-------------------
Add -1216/3 on each side
4/3y + 1216/3 + -1216/3 = 420 + -1216/3
4/3y = 44/3
-------------------------
Divide each side by 4/3
4/3y ÷ 4/3 = 44/3 ÷ 4/3
y = 11
y = 11 is your answer

Mademuasel [1]4 years ago

6 0

Answer:

y = 11 is your answer

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When a function has a zero, simply put, that point is where the graph goes through the x-axis. At this point, the y value is 0.

If a function has a 0 of 1/2, that translates to x = 1/2 and also (1/2, 0). That means that y = 0 when x = 1/2.

If x = 1/2 and is a zero, then x - 1/2 = 0 and 2x - 1 = 0 (notice that y = 0 here and solving for x would get you right back to x = 1/2).

The simplest function with a zero of 1/2 is

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You know it is true that the zero is 1/2 for two reasons. First one is to set the right side equal to 0 and solve for x.

The second one is to graph the line y = 2x - 1 and see that it goes through the x axis at 1/2 where y = 0.

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