jane and jill were simplifying the expression (2x2+x) +2(-x2+×) and obtained different answers . who is right and why?
1 answer:
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Answer:
Step-by-step explanation:
1). If a point C is lying on a line segment RB,
Then RB = RC + CB
Since, RB = 45, CB = 3x - 12 and RC = 2x + 9
45 = (2x + 9) + (3x - 12)
45 = (2x + 3x) - 3
48 = 5x
x =
x = 9.6
2). Since, RC = 2x + 9
RC = 2(9.6) + 9
= 19.2 + 9
= 28.2 units
3). Distance between the two points and
is given by the formula,
d =
Distance between the points A(2, -2) and D(-2, 2) will be,
=
=
= 5.657
≈ 5.66 units