Why you're still finding your X and questioning Y she's happy now.
3x+y = 4
x+y= 2 multiply all the elements of (x+y) by -1 & then add it up to the 1st equation
3x+y=4
-x-y =-2
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2x+0y =2 ==> x=2/2 =1 & replace x=1 by its value in any of the equation & you will get the value of y=1
2) 3x+y = 7
x+2y = 4
Follow the same methodology as before, but to eliminate y, multiply the 1st equation by (-2) and you will get x=2 & y=1
Answer:
25% decrease
Step-by-step explanation:
Take the original price and subtract the new price
450-337.50 =112.50
Divide by the original price
112.50/450=.25
Multiply by 100% to change to percent form
25%
Let us say that:
S = total sales
Therefore the inequality equation in this case is:
300 + 0.05 S ≥ 550
Solving:
S ≥ 5,000
<span>Therefore she must have a sales of at least $5,000 to have
an earning of at least $550.</span>
