Solve using the quadratic formula

8^2=20x

Distribute. 3 (3x-3x^2)

A/6-11=25 what is a?

50 tens equal how many hundreds

in a class of 45 students, 25 students failed Maths, 20 students failed Physics, and students failed both. A student is selected at random.

How much pure acid do you mix with 2L of 40% acid to get 70% acid

What you get when you add numbers together

Is 11.6 is irrational.

2/7 of the pupils in Year 9 say their favourite colour is red. There are 119 pupils in Year 9. How many students said red is their favourite colour?

A satellite orbits Mars. When it reaches S, it is about 12,000 km above the planet. How many arc degrees of the planet are visible to a camera in the satellite?

Jordan wants to estimate the number of students in his school who have their own cell phone. He surveys every eighth person who enters the cafeteria for lunch is this sample biased or unbiased explain