A) 10
B) 1
C) -2
D) 2
2007-09-16 20:09:22 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
c
2007-09-16 20:13:50 · answer #1 · answered by sam 3 · 0⤊ 0⤋
4) the 1st couple is a lineair equipment. the 2d couple no longer if x2 capability x² and y2 capability y² The third couple is a lineair equipment. The fourth isn't by using fact there's a made from x.y in the 2d equation. the answer is purely to envision whether the equation feels like a.x + b.y = c 3) Fill in the values: 6 = 3 x3 - 5 6 = 0.5 x 3 for sure no longer superb. -2 = 3 x a million - 5 -2 = 0.5 x a million for sure no longer superb 2 = 3 x a million - 5 2 = 0.5 x 2 no longer superb -2 = 3 x (-a million) - 5 -2 = 0.5 x (-a million) additionally no longer superb the answer of y = 3.x - 5 and y = 0.5.x is 3.x - 5 = 0.5.x so 2.5.x = 5 supplies x = 2 Fill this in one equation supplies y = a million. the element (a million,2) isn't secure in the techniques. 2) the y intercept is the placement the place x = 0 so fill in x = 0 and you get the y. The slope is the coefficient of x while the function is written as y = c.x + b (observe the coefficient of y would desire to be a million in this notation)
2016-12-26 14:52:05 · answer #2 · answered by ? 4 · 0⤊ 0⤋
There are actually 2 correct answers, -2 and +5.
Doug
2007-09-16 20:14:06 · answer #3 · answered by doug_donaghue 7 · 0⤊ 0⤋
x^2-3x-10=0
(x-5)*(x+2)=0
soln 1: x-5 = 0
x = 5
soln 2: x+2=0
x = -2
ans: (C)
2007-09-16 20:20:05 · answer #4 · answered by Pakyuol 7 · 0⤊ 0⤋
x^2-3x-10=0
x^2 - 5x + 2x - 10
x(x-5) + 2(x-5)
(x - 5) (x + 2)
x=5 x= -2
c. is correct.
2007-09-16 20:18:41 · answer #5 · answered by Lollipop 5 · 0⤊ 0⤋
(x - 5) (x + 2) = 0
x = 5 , x = - 2 are correct answers.
Option C) is one possible answer.
2007-09-16 20:29:04 · answer #6 · answered by Como 7 · 1⤊ 0⤋
As a Calculus grader I would say: ask your teacher or T.A. for help: it's more honest, and you will see why the right answer is right.
2007-09-16 20:15:11 · answer #7 · answered by Anonymous · 0⤊ 0⤋