Answer:
x=3, y=-1. (3, -1).
Step-by-step explanation:
x-3y=6
2x+2y=4
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x=3y+6
2(3y+6)+2y=4
6y+12+2y=4
8y+12=4
8y=4-12
8y=-8
y=-8/8
y=-1
x-3(-1)=6
x+3=6
x=6-3
x=3
Answer:
because 4 quarters make a dollar
Step-by-step explanation:
Answer:
$0.19.
Step-by-step explanation:
Unit rate / ounce = 2.66 / 14
= $0.19.
3 times: Rate, Rate of change and Slope.
Answer:
The expression which will result in difference of two squares is:
(–7x + 4)·(–7x – 4)
Step-by-step explanation:
We know that the formula of the type:
(a-b)(a+b)=a²-b²
i.e. it is a difference of two square quantities. (a^2 and b^2)
since,
a= -7x , b=4
(-7x+4)(-7x-4)= (-7x)² - (4)²
=(7x)² - 4²
So the expression is a difference of two square quantities:
(7x)² and (4)²
Hence the answer is (–7x + 4)·(–7x – 4)....
