My parents increased my pocket money by 10% and then three months later increased it by further 10%

my father said this was an increase of 21% can you explain this

How many times will 70 divide by 2

3x + y = - 4 -6x - 4y = 14

Write a number in each of these boxes so that the mode of the five numbers is 11

Sally will earn $30 for every 5 hours that she babysits. Which of the following equations can be used to represent the proportional relationship?

7 (x+5) = 4 (x+8) + 6

What number equals 100 when squared?

What are the zeros of f (x) = x^2-8x+15

What is the average speed on a car that travels 800 kilometers in 20 hours?

Solve the following equation. Then place the correct number in the box. 3x + 1 + 5x = 7 + 15 = 7x X =

Party favors are on sale for $2.40 each. You have $380 to spend on the decorations and gifts, and you have already spent $270 on decorating. Write and solve an inequality to find the number of party favors you can buy.