Top answers

1/4 of a number is 20. What is 5 times the number?

400
GF
Answered by Gabrielle F. • Maths tutor
9211 Views

How do I solve the inequality 7x+2 > 2x-3?

Treat the > as an = and solve the equation as you normally would. So for the inequality 7x+2 > 2x-3, pretend it was 7x+2 = 2x-3 and solve that. Just make sure you always replace where you'd write an = ...
JS
Answered by Jonathan S. • Maths tutor
4713 Views

How would you solve a quadratic equation (e.g. x^2-8x+15=0)?

There are two ways to solve the equation. One is to simply factorise it and the other is to use the formula provided in the formula booklet. The second method is probably easier when there isn't a nice easy ...
JG
Answered by Jane G. • Maths tutor
3401 Views

Estimate the answer to: (4.28 x sqrt(99))/7.83

4.28 rounds down to 4; sqrt(99) is approximately 10; 7.83 rounds up to 8 So an appropriate estimate would be: (4x10)/8 = 40/8 = 5
AT
Answered by Amy T. • Maths tutor
3333 Views

-8x + 7 > 5x + 2

-13 x + 7 > 2 -13 x > -5 x < 5/13 Remember multiply or divide a number by a negative number, you switch the inequality sign
HK
Answered by Hyerim K. • Maths tutor
3461 Views