-1 < x < 5
-1 < x ≤ 5
-1 ≤ x ≤ 6
-1 ≤ x < 6
Correct answer is B
-6 ≤ 4 - 2x < 5 - x
split inequalities into two and solve each part as follows:
-6 ≤ 4 - 2x = -6 - 4 ≤ -2x
-10 ≤ -2x
−10−2 ≥ −2x−2
giving 5 ≥ x or x ≤ 5
4 - 2x < 5 - x
-2x + x < 5 - 4
-x < 1
−x−1 > 1−1
giving x > -1 or -1 < x
Combining the two results, gives -1 < x ≤ 5
Express 398753 correct to three significant figures...
In the diagram, O is the centre of the circle. OM||XZ and < ZOM = 25º. Calculate ∠X...
If log10 2 = m and log10 3 = n, find log10 24 in terms of m and ...
A tax payer is allowed 18th of his income tax-free, and pays 20% on the remainder. If h...
PQRS is a cyclic quadrilateral. Find x + y...
In the diagram, POS and ROT are straight lines. OPQR is a parallelogram, |OS| = |OT| and ∠O...
If (x + 3) varies directly as y and x = 3 when y = 12, what is the value of x when y = 8?...