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Sam is a bodybuilder. He currently weighs 90kg, but is aiming to be at 130kg in the next four months. Every month, he puts on 8% of his weight. Does he reach his target?

90kg x (1.08)^4= 122.44....No, he does not reach his target

Answered by ANGELICA S. • Maths tutor

2253 Views

Solve the simultaneous equations x+2y=4 and x-3y=6

This can be solved in two ways, by substitution or by elimination.Firstly, by substitution, rearrange the first of the two equations in terms of x by subtracting 2y from both sides to get x=4-2y. Then plu...

Answered by Hamish M. • Maths tutor

5645 Views

Solve the following equation: 13y - 5 = 9y + 27

13y - 5 = 9y + 2713y - 9y = 27 + 54y = 32y = 32/4y = 8

Answered by Megan G. • Maths tutor

2936 Views

Solve the simultaneous equations x^2 + y^2 =13 and x= y - 5.

(y-5)² + y² = 13y²-10y +25 + y²=13.2y²-10y+12=0.y²-5y+6=0.(y-3)(y-2)=0. So, y=3 or y=2. Then substituting these values of y back into x=y-...

Answered by Hollie D. • Maths tutor

4207 Views

Expand (x+4)(x-4)=33 to give values of x

Use FOIL to expand the brackets. To do this, we start by multiplying the FIRST value in each bracket which in this case is x so we get x^2. Then we multiply the OUTSIDE two values, so here that is x and -...

Answered by Aria B. • Maths tutor

2578 Views