For the first question you need to find the formula for the rectangle, after you did that fill it in. and find your answer.
X + y = 40.....multiply by -4
4x + 6y = 180
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-4x - 4y = -160 (result of multiplying by -4)
4x + 6y = 180
------------------add
2y = 20
y = 20/2
y = 10 <===
x = 30
Answer:
y = 7x - 5
Step-by-step explanation:
y=mx+b Where m is the slope and b is the y-intercept
Answer: (-2, 11/6)
Step-by-step explanation:
The volume is length * width * height. Length * width is 4 * 5 or 20, so we have that 20 * height = 200. Divide by 20 to get height = 10.
