If m2 1 + m2 =180° in the figure below, which of the two lines must be parallel?
A: c||d
B: a||b
C: a||c
D: c||b
E: None of the choices are correct.

( i really need this one ASAP)

Which mathematical statements are true? 1) if 3 is an odd number, then 3 times 3 is an even number. 2) if 6 is less than 7, then 4 is greater than 7. 3) six is divisible by 3, and 10 is a multiple of 2. 4) the average of the data is greater than the largest value in the data, or it’s less than the largest value in the data. 5) the slope of a linear graph is its rate of change, and the graph’s y-intercept is the initial value. 6) if an equilateral triangle has equal angles, then all its angles will measure 45°.

If 20% of a number is 35, what is 50% of that number?

Write the equation for the parabola that has x− intercepts (−2,0) and (4,0) and y− intercept (0,4).