Answer:
a) decimal 7.222
fraction: 65/9
percentage: 722.22
b) Fraction: 37/5
decimal: 7.4
Percentage: 740
Step-by-step explanation:
remember, you can do anything to an equation as long as you do it to both sides
we can do a subsitution
y=x+6
y=-7x-10
since y=x+6, we can subsitute x+6 for y in the other equation
y=-7x-10
x+6=-7x-10
add 7x to both sides
8x+6=-10
minus 6 from both sides
8x=-16
divide both sides by 8
x=-16/8=-2
the valu eof x that satisfies both equations is x=-2
Formula for slope is y2 - y1 over x2 - x1
Just from looking at the first set of points I know that the slope is 0 or undefined because the line is vertical. There is no y intercept.
For the second one I know that it is a horizontal line meaning that there is no slope either. It does have a y intercept though.pointslopeform y = 4. Standardform y = 4
