Question 141
The mean of five numbers is 12. If one number is removed and the mean of the remaining four is 10, what is the removed number?StatisticsMeasures of central tendencymedium
Select one option to submit your answer.
NSC Mathematics – South Africa
AI-generated exam-style practice tailored for South Africa students.
Practice mode
Answer immediately. If you miss, we show exactly why your selected option is wrong.
Progress: 0/10 correct (0 answered)
Question 142
Find the equation of the line perpendicular to $y = 2x + 3$ that passes through the point (1,4).GeometryCoordinate geometry: lines and slopesmedium
Select one option to submit your answer.
Question 143
Evaluate the integral $\int (3x^2 - 4) dx$.CalculusIntegration: Basic rulesmedium
Select one option to submit your answer.
Question 144
Given a circle with radius 7 cm, what is the area of the sector with a central angle of 60°?GeometryCircle geometry: Areas and sectorsmedium
Select one option to submit your answer.
Question 145
If $f(x) = \sin x$ and $g(x) = \cos x$, what is the value of $f(\pi/3) \times g(\pi/6)$?TrigonometryTrigonometric functions and valueshard
Select one option to submit your answer.
Question 146
Simplify the expression: 3(x + 2) - 5(x - 1).AlgebraAlgebra - Simplifying expressionseasy
Select one option to submit your answer.
Question 147
Find the value of f(3) if f(x) = 2x^2 - 5x + 1.FunctionsFunctions - Evaluationeasy
Select one option to submit your answer.
Question 148
Differentiate y = 5x^3 - 2x^2 + 7x - 4.CalculusCalculus - Differentiationmedium
Select one option to submit your answer.
Question 149
Calculate the length of the diagonal of a rectangle with length 8 cm and width 6 cm.GeometryGeometry - Pythagoras theoremeasy
Select one option to submit your answer.
Question 150
If a fair die is rolled once, what is the probability of getting an even number?ProbabilityProbability - Basic probabilityeasy
Select one option to submit your answer.