y > -9
y < 3
y > 4
y < 9
y > 0
Correct answer is C
(Y−3)<y33y−9<y2y<9y<412
Find (X-Y) if 4x - 3y = 7 and 3x - 2y = 5
4
3
2
-2
-3
Correct answer is C
No explanation has been provided for this answer.
Find the equation whose roots are 23and−14
12x2−5x+2=0
12x2−11x+2=0
x2−1112x+2=0
x2+1112x−2=0
12x2+11x+2=0
Correct answer is A
x2 - (sum of given roots)x + (product of given roots ) = 0
x2 - (23+−14)x + (23∗−14) = 0
x2 - (8−312)x + (−212)
x2 - 512x + −212
multiply through by the LCM 12
12 * x2 - 12 * 512x + 12 * −212
12x2 - 5x - 2 = 0
Make S the subject of the formula: V=K√T−S
T−K2V2=S
T+K2V2=S
T−K2V=S
T−KV=S
T−KV2=S
Correct answer is A
V=K√T−S
square both sides of the equation
V2=K2T−S
cross multiply
V2T−S=K2
T−S=K2V2
T=K2V2+S
T−=K2V2=S
For what value of x is the expression
not defined?3, 1
-1, -3
-1, 3
3, -2
1, -3
Correct answer is C
x2 - 2x - 3 = 0
x2 - 3x + x - 3 = 0
x(x - 3) + (x - 3) = 0
(x + 1)(x - 3) = 0
x = -1 or 3