Question 221
Solve for \( x \) in the equation \( 2x^2 - 5x + 2 = 0 \).Quadratic equations and functionsQuadratic equations and functionsmedium
Select one option to submit your answer.
WAEC Mathematics – Sierra Leone
AI-generated exam-style practice tailored for Sierra Leone students.
Practice mode
Answer immediately. If you miss, we show exactly why your selected option is wrong.
Progress: 0/10 correct (0 answered)
Question 222
Given \( \log_2 x = 5 \), what is the value of \( x \)?Logarithms and exponentialsLogarithms and exponentialseasy
Select one option to submit your answer.
Question 223
Evaluate the derivative of \( f(x) = 3x^3 - 5x^2 + 2x -7 \).Differentiation (calculus)Differentiationmedium
Select one option to submit your answer.
Question 224
A bag contains 3 red balls and 5 blue balls. Two balls are drawn at random without replacement. What is the probability that both balls are red?Probability and statisticsProbability and statisticseasy
Select one option to submit your answer.
Question 225
The inequality 3x - 7 < 2x + 5 represents which of the following solution sets?Inequalities and graphsInequalities and graphseasy
Select one option to submit your answer.
Question 226
Given the sequence defined by \( a_n = 3n - 1 \), what is the sum of the first 20 terms?Sequences and seriesSequences and seriesmedium
Select one option to submit your answer.
Question 227
If \( \vec{a} = 2\hat{i} - 3\hat{j} + \hat{k} \) and \( \vec{b} = -\hat{i} + 4\hat{j} + 2\hat{k} \), what is \( \vec{a} \cdot \vec{b} \)?VectorsVectorshard
Select one option to submit your answer.
Question 228
Given vectors u = (2, -1, 3) and v = (0, 4, -2), what is the dot product u · v?VectorsVectorsmedium
Select one option to submit your answer.
Question 229
Find the integral of f(x) = 2x^3 with respect to x.Integration (calculus)Integration (calculus)hard
Select one option to submit your answer.
Question 230
Given the vector \( \vec{u} = 3\hat{i} - 2\hat{j} + \hat{k} \) and \( \vec{v} = -\hat{i} + 4\hat{j} + 2\hat{k} \), what is the dot product \( \vec{u} \cdot \vec{v} \)?VectorsVectorsmedium
Select one option to submit your answer.