Quadratic equation refers to polynomial equation that have a general form of ax2+bx+c=0, where a, b and c are co-efficient. a≠0 otherwise it would be a linear equation and c is constant. The quadratic formula is defined as x= (-b±√b2-4ac)/2a, where “a” is the co-efficient of the x2, b is the linear co-efficient of the x and c is the constant term. Therefore, the quadratic formula involves substituting the co-efficient from a given quadratic equation into the formula.
Find the area of triangle PQRif p= 6.5 cm, r = 4.3 cm and Ð Q = 39˚. Give your answer correct to 2 decimal places. A. 5.7 cm2 B. 8.79 cm2 C. 8.01 cm2 D. 9.8 cm2
If the Ferris wheel’s diameter is 120 metres, how far would a person riding the ferris wheel travel in one rotation? (Use π= 3.142) A. 407.1 m B. 546 m C. 376.8 m D. 307.3 m
If the Earth’s radius is 6371 metres, what is its circumference? (Use π = 3.14.) A.36 000.23 km B. 43 000.88 km 9800 km D. 40 009.88 km
Calculate the perimeter around this sector of the image. (Use π = 3.142.) A. 16 m B. 12.62 m C. 23.7 m D. 45 m
Find the arc length of the sector. A. 10 cm B. 8.6 cm C. 14.3 cm D. 12 cm
