W is directly proportional to U. If W = 5 when U = 3...
W is directly proportional to U. If W = 5 when U = 3, find U when W = 2/7
6/35
10/21
21/10
35/6
Correct answer is A
\(W ∝ U\\
W = KU\\
K = \frac{W}{U}\\
K = \frac{5}{3}\\
W = \frac{5}{3}U\\
\frac{2}{7} = \frac{5}{3}U\\
U = \frac{2}{7} \times \frac{3}{5}\\
U = \frac{6}{35}\)
Find the root of the equation 2x\(^2\) - 3x - 2 = 0 ...
A straight line passes through the point P(1,2) and Q (5,8). Calculate the length PQ ...
For what value of y is the expression \(\frac{y + 2}{y^{2} - 3y - 10}\) undefined?...
If 7 + y = 4 (mod 8), find the least value of y, 10 \(\leq y \leq 30\) ...
Find the median of the following set of numbers: 28, 29, 39, 38, 33, 37, 26, 20, 15, 25 ...