Algebra Answers

1. A man saves #100 in his first year of work and each year he saves #20 more than the proceeding year. In how many years will be save #5800.

2. A polygon has 25 sides, the lengths of which starting from the smallest sides are in A.P, if the perimeter of the polygon is 2100cm and the length of the largest side is 20times that of the smallest.find the length of the smallest side and the common difference of the A.P

Use the vertical line test to identify graphs in which y is a function of x.

2 A tunnelling machine drills 500 metres. Use your values from the

table to estimate the cost of drilling if the first metre costs £X and

each extra met

re costs £Y.

x=17

y=272

Write an equation to describe the variation. Use k for the constant of proportionality.

g  varies inversely as p 

Write an equation to describe the variation. Use k for the constant of proportionality.

r  varies directly as f

The intensity of light​ (in foot-candles) varies inversely as the square of​ x, the distance in feet from the light source. The intensity of light 2 feet from the source is 80 ​foot-candles. How far away is the source if the intensity of light is 5 ​foot-candles?

For the​ statement, find the constant of variation and the variation equation.

y varies jointly as x and the cube of z; y=16 when x=4 and z=1

Write the statement as an equation. Use k as the constant of variation.

r varies jointly as s and the cube of n

Write the statement as an equation. Use k as the constant of variation.

w varies jointly as c and f