Answer:
x=2+ or - the square root of 3
Step-by-step explanation:
solve the equation for x by finding a, b, and c of the quadratic then applying the quadratic formula.
First question:
1. Set equations equal to each other so 5x-9=2x+6
2. Put x's on one side so that 3x=15
3. Divide by 3 so that x=15
4. Substitute 15 in for x so that y=2(15)+6
5. Solve for y so that y=36
6. Thus the equations intersect at (15,36)
Second question:
1. Since for lines y=mx+b, and m=slope=3 you only need to write an equation with slope 3
2. y=3x+b, b can be any number
7/4 and 3 because they are positive
Answer:
7 and 5
Step-by-step explanation:
7+5=12 and 7-5=2
Answer:
72 hours
Step-by-step explanation:
1hour30minutes times 48 cars (since TWO pass every 1:30, not one)
equals 72 hours, or three days
