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Solve this equation; 5x - 4 = 3x + 7

In order to solve equations of x it is necessary to move all the Xs over to one side and the other numbers over to the other side;

5x - 4 = 3x + 7

As 5x is greater than 3x i...

Answered by Kate E. • Maths tutor

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Insert one pair of brackets so that this calculation is correct; 3 x 6 + 5 - 1 = 32

3 x 6 + 5 - 1 = 32
Without any brackets the answer to the calculation would be 22 following the rules of BIDMAS (Brackets, Indices, Division, Multiplication, Addition, Subtraction)

Answered by Kate E. • Maths tutor

15248 Views

Bag A contains £7.20 in 20p coins. Bag B contains only 5p coins. The number of coins in bag B is three-quarters of the number of coins in bag A. How much money is in bag B? (in £s)

We have been told that there is £7.20 in bag A, to simplify this, you can begin by turning this into pennies as well. So we have 720p in bag A. We need to know how many 20p coins this is, so we will divid...

Answered by Jessica K. • Maths tutor

5043 Views

What factors affect rate of reaction?

In order for a reaction to occur, particles must 1. COLLIDE with each other 2. with sufficient KINETIC ENERGY (energy greater than or equal to the ACTIVATION ENERGY). This is known as Collision Theory....

Answered by Amy H. • Chemistry tutor

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How do I know when to use SER or ESTAR

Both SER and ESTAR mean TO BE in Spanish but are used in different situations. Ser gives a more permenant meaning than estar. Here's an example: está enferma and es enferma both mean she's ill literall...

Answered by Amy H. • Spanish tutor

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