B. 5x – 10y = 90
C. 90 – 10y = 5x
D. 90 + 10y = 5x
It's the 3rd equation (which is in a disguised form)...we have
90 - 10y = 5x add 10y to both sides
90 = 5x + 10y
This says that the nmber of tmes she hiked the 5 mile trail (x) plus the number of times she hiked the 10 mile trail (y) = 90 miles
5(-3x - 2) - (x - 3) = -4(4x + 5) + 13
Problem 2: Simplify the expression
2(a -3) + 4b - 2(a -b -3) + 5
Problem 3: If x <2, simplify
|x - 2| - 4|-6|
Problem 4: Find the distance between the points (-4 , -5) and (-1 , -1).
Problem 5: Find the x intercept of the graph of the equation .
2x - 4y = 9
Problem 6: Evaluate f(2) - f(1)
f(x) = 6x + 1
Problem 7: Find the slope of the line passing through the points (-1, -1) and (2 , 2).
Problem 8: Find the slope of the line
5x - 5y = 7
Problem 9: Find the equation of the line that passes through the points (-1 , -1) and (-1 , 2).
Problem 10: Solve the equation
|-2x + 2| -3 = -3
Simplifying -2x + -4y = 9 Solving -2x + -4y = 9 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4y' to each side of the equation. -2x + -4y + 4y = 9 + 4y Combine like terms: -4y + 4y = 0 -2x + 0 = 9 + 4y -2x = 9 + 4y Divide each side by '-2'. x = -4.5 + -2y Simplifying x = -4.5 + -2y13/18
169
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5x - 5y = 7
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