Top answers

In a class of 28 students, the average height of the 12 boys is 1.58 metres. The average height of the class is 1.52 metres. What is the average of the girls?

If we take x to be the total heights of the all the boys (1.58 * 12) be x and y to be the total height of all the students (1.52 * 28) then we may define the total heights of the girls, z, as y – x. If we di...
MB
Answered by Micah B. • Maths tutor
11201 Views

One apple costs 0.56p, if i wanted 12 Apples what would be my total?

Method1) 1 Apple = £0.56 10 Apples = £0.56 x 10 = £5.60 I want 12 Apples, so 10 Apples = £5.60 + 1 Apple = £0.56 + 1 Apple = £0.56 + Total: 12 Apples = £6.72 Method 2) 0.56 x 12 = £6.72 - Grid method multipl...
AM
Answered by Aqeeb M. • Maths tutor
2431 Views

Simplify the Equation, 60x+20y-4x-10y

60x+ 20y - 4x -10y Step 1 ) collate the X's together = 60x -4x = 60-4= 56 add the x = 56x Step 2) collate the Y's together = +20y - 10y = +20 -10 = +10 add the y = +10yStep 3) add answers to step 1 and 2 tog...
AM
Answered by Aqeeb M. • Maths tutor
3012 Views

Andrew buys a Laptop for £600 which includes 20% VAT. What is the price of the Laptop without VAT?

£600 includes 20% VAT Therefore £600 is 100% of original price + 20% from VAT, meaning £600 is a 120% price increase in accordance to original price.120% as a decimal is 1.2 - simply divide by 100 to get % i...
AM
Answered by Aqeeb M. • Maths tutor
5647 Views

Solve x^2 = 4(x - 3)^2

First multiply out the bracket.x^2 = 4(x - 3)^2 then becomes x^2 = 4(x^2 - 6x + 9)Expand the right hand side further. x^2 = 4x^2 - 24x + 36Collect like terms. 3x^2 - 24x + 36 = 0The number 3 is a common fact...
JB
Answered by Jenny B. • Maths tutor
3314 Views