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Alex wants to buy a new phone. It costs £280. Alex’s weekly wage is £420. He saves 15% of his wage each week. How many weeks does it take Alex to save enough money to buy the phone?

Total wage each week= £420. In one week, he saves 15% of this: 15% of 420 is 0.15 x 420 = £63. So he saves £63 in one week. To calculate the total number of weeks it takes to save up for the phone, divide 28...
AM
Answered by Alexandra M. • Maths tutor
4555 Views

how do you solve a linear equation where there are unknowns on each side e.g. 4(k + 7) = 12k + 4

In order to solve this equation you want to get all of the unknowns on one side of the equal sign and all of the numbers on the other side. However, before you do this, the first step is to expand the bracke...
MG
Answered by Molly G. • Maths tutor
4282 Views

rearrange the equation y=7x-3 to make x the subject

The first step would be to have the x's on their own so add three to both sides so the equation goes from y=7x-3 to y+3=7x. The current subject is 7x= we need x= so both sides need to be divided by 7. This l...
SG
Answered by Sam G. • Maths tutor
11840 Views

The first four terms in a sequence are: -1, -4, -7, -10. Write an expression for the nth term of the sequence.

Answer: -3n + 2 Explanation: 'n' stands for term number. The 'nth' term is a formula with 'n' in it which enables you to find any term of a sequence. This sequence of numbers changes by the same amount each ...
RL
Answered by Rebecca L. • Maths tutor
7896 Views

Expand and simplify (3 + √ 2)(5 – √ 2)

To complete this question we can use the FOIL method. First we can multiply out the First number in each of the brackets - 3x5=15 Then we multiply the Outer numbers in each bracket - 3x-√ 2=-3√ 2 Then the In...
EJ
Answered by Emily J. • Maths tutor
11295 Views