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Simplify 7h + 5k + h - 7k

Figure out which of the variables are like terms, i.e which variables are the same and can be combined together? 7h + 5k + h - 7k Here we've added h to 7h: 8h + 5k - 7k And then, taken 7k away from 5k: 8h + ...
NH
Answered by Naomi H. • Maths tutor
5402 Views

Write 0.72727272 as a fraction in its simplest form

a = 0.72727272 100a = 72.72727272 100a - a =72.72727272-0.72727272 = 72 = 99a a =72/99 so 0.72727272 = 72/99 0.72727272 refers to 0.72 where the 72 is recurring.
JH
Answered by James H. • Maths tutor
17145 Views

Solve X^2 - 10X + 18=0

This is solving a quadratic equation. There are two ways we can solve this. Using the quadratic equation or completing the square. 1. Quadratic equation-The equation is in the form ax^2 + bx + c. Where a=1 b...
BM
Answered by Ben M. • Maths tutor
9049 Views

Expand and simplify 3(m + 4) – 2(4m + 1)

Multiply through the 3 of the first bracket to get 3m +12. Then multiply out the second bracket by -2 to get -8m -2. Write it out in a line: 3m + 12 - 8m -2 Simplify: -5m +10 Divide by -5 again to simplify f...
TD
Answered by Tutor49422 D. • Maths tutor
15177 Views

A bag contains 5 blue marbles and 5 red marbles. If marbles are NOT replaced after being selected from the bag, what is the probability (in percentage) of picking 2 red marbles? Give your answer to one decimal place.

As there are a total of 10 marbles in the bag, then the probability of picking a red marble is 5/10. When the next marble is selected, there are only 9 marbles left in the bag since the red marble has not be...
PB
Answered by Peter B. • Maths tutor
10051 Views