Answer:
x = -8
y = 7
Step-by-step explanation:
5x + 7y = 9
2x - 3y = -37
1.) First, multiply each side to match either y-values or x-values. (In this example, we'll use match x-values)
10x + 14y = 18 (multiplied by 2)
10x - 15y = -185 (multiplied by 5)
2.) Then, subtract the entirety of one equation to isolate the y-value.
10x + 14y = 18
-10x + 15y = 185
3.) Add and subtract values and divide to find y.
29y = 203
y = 7
4.) Plug-in y to solve for x into one equation, or repeat steps 1-3.
15x + 21y = 27
14x - 21y = -259
29x = -232
x = -8
36÷3=12 12×5=60(the area of the resulting triangle)
Rae sold: 765 shirts in a week.
Mandy sold: 8,900 shirts in a week.
Key word: Less
We need to subtract.
8900 - 765 = 8,135
Rae sold 8,135 shirts LESS than Mandy.
OR Mandy sold 8,135 MORE shirts than Rae.
A = 1 b = 9 c = 10
x = [-b +- sq root(b^2 -4*a*c)] / 2*a
x = [-9 +- sq root (81 -40) ] / 2
x = -9 /2 + sq root (41) / 2
x = -4.5 +
<span>
<span>
<span>
3.202
= </span></span></span>
<span>
<span>
<span>
-1.298</span></span></span>
x = -4.5 -
<span>
<span>
<span>
3.202
= -7.702
answer is B
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