12. what's the simplified form of x − 1 + 4 + 7x − 3?
a. 6x
b. 8x
c. 8x + 6
d. 6x + 3
19. simplify and solve this equation: 4m + 9 + 5m – 12 = 42.
a. m = –5
b. m = -4
c. m = 4
d. m = 5
i'm really bad at simplifying

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225

step-by-step explanation:

abc

answer: the distance

step-by-step explanation:

to calculate the distance d of a line segment with endpoints (x1, y1) and (x2, y2) use the formula d (x2 x1)2 (y2 y1)2. to calculate the midpoint of a line segment with endpoints (x1, y1) and (x2, y2) use the formula

ur right ive taken the test

step-by-step explanation: