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A ladder 7.4m long is leaning against a wall as shown in the diagram. The foot of the ladder is 2.9m away from the wall. Calculate the distance the ladder reaches up the wall to 2 significant figures.

7.4 2 -2.9 2 =answer 2 square root above answer to get the answer
AC
Answered by Abi C. • Maths tutor
6172 Views

What is Pythagoras' Theorem?

You can use pythagoras' theorem to find the length of a side of a right angled triangle, provided that at least two of the lengths of the sides are known. The general rule is a 2 + b 2 = c 2 where a, b and c...
VJ
Answered by Victoria J. • Maths tutor
5069 Views

50 people ate a snack , some had apples some had biscuits the rest had banana. 21 people were male the rest female. 6 out of 8 people who had apples were female. 18 people had biscuits. 9 females had bananas. How many males had biscuits?

Write down all the information they have given you so There is 50 people 21 male so therefore 50 -21 = 29 females It says 6 out of 8 people who had apples were female so that means 8 people had apples Apples...
AD
Answered by Amelia D. • Maths tutor
3285 Views

Find the gradient of the curve y=sin(x^2) + e^(x) at the point x= sqrt(pi)

y=sin(x 2 ) + e x Firstly we need to differentiate. dy/dx = 2xcos(x 2 ) + e x using the chain rule Notice the gradient at x = sqrt(pi) is found when we sub x into dy/dx Hence dy/dx = 2*sqrt(pi) cos( sqrt(pi)...
JR
Answered by Jordan R. • Maths tutor
7410 Views

Write 0.2(54) as a fraction in its simplest form. (Where 0.2(54) = 0.254545454...)

Let x = 0.2(54) = 0.2545454... Then 100x = 25.454545... = 25.4(54) So 99x = 100x - x = 25.4(54) - 0.2(54) = 25.2 Hence 990x =252 Therefore x = 252/990 = 14/55
MH
Answered by Matt H. • Maths tutor
7817 Views