What is the sum of 4.2 × 10^5 and 5.3 × 10^5? a 95 × 10^5 b 95 × 10^10 c 9.5 × 10^5 d 9.5 × 10^10

If you answer right ill give brainliest, : )

Simone claims the initial value and y-intercept are the same thing on a graph. is she correct? if you know that a line has a slope of and a y-intercept of 7, what is the equation for that line in slope-intercept form?

What is the missing step in this proof ?