75cm2
84cm2
85cm2
86cm2
95cm2
Correct answer is C
No explanation has been provided for this answer.
Solve the simultaneous equations y = 3x; 4y - 5x =14
-2,-6
2,6
2,-6
-2,6
-1,-3
Correct answer is B
y = 3x ... (i);
4y - 5x =14 ... (ii)
Put 3x for y in (ii).
4(3x) - 5x = 14
12x - 5x = 14
7x = 14 ⟹⟹ x = 2.
y = 3x = 3(2) = 6
(x, y) = (2, 6)
(2x - 9)(x - 5)
(2x-15)(x + 3)
(2x +15)(x - 3)
(2x -15(x - 3)
(2x - 9)(x + 5)
Correct answer is D
2x\(^2\) - 21x + 45
= 2x\(^2\) - 15x - 6x + 45
= x(2x - 15) - 3(2x - 15)
= (x - 3)(2x - 15)
Write as a single fraction: \(\frac{5}{6r} - \frac{3}{4r}\)
Correct answer is E
\(\frac{5}{6r} - \frac{3}{4r}\)
= \(\frac{10 - 9}{12r}\)
= \(\frac{1}{12r}\)
Solve the equation x\(^2\) - 2x - 3 = 0
(-3, 1)
(-1, -3)
(3,1)
(43, 0)
(-1, 3).
Correct answer is E
x\(^2\) - 2x - 3 = 0
x\(^2\) - 3x + x - 3 = 0
x(x - 3) + 1(x - 3) = 0
(x + 1)(x - 3) = 0
x = (-1, 3)