The area of the trapezium ABCD above is

8x - 4(x - 5) =

AIDS is a killer disease because:

The energy used in thermal decomposition is:

The number of double bonds in a molecule of carbon dioxide is:

Which of the following statements is true?

Instruction: Choose from the four options the word or pair of words which BEST completes the meaning of the sentence.

Despite his short-temper, his willingness to give of his wealth to help others to succeed led people to call him ............

Given ƒ : x -> 3x - 1, and g : x -> x², then ƒg(-2) =

A reaction that gives out heat is said to be:

A(n) __________ printer is suitable for printing multi-part forms because they easily print through many layers of paper.

None of these solutions in water conducts electricity EXCEPT for:

Hydrochloric acid forms salts called:

75 g of freshly dug soil was placed in an oven at 105 ℃ for 24 hours. It was allowed to cool, then reweighed. If the final mass of the dry soil was 66 g, what was the % water content of the original soil sample?

Dividing 9 × 10^-2 by 3 × 10^-8 gives:

In the equation, carbon monoxide + oxygen → carbon dioxide, a reactant is:

Which one of the following is NOT a function of the placenta?

Plant stems grow towards a light source.This is an example of:

In order to carry out photosynthesis, a plant needs:

The electrical charges on a proton and an electron are:

Which of the following sets has a finite number of members?