Top answers

Solve the simultaneous equations: 4x + 2y = 26 and 3x + 3y = 21

Let eq 1 = 4x + 2y = 26 eq 2 = 3x + 3y = 21 Using the elimination method: You need to make either the xs or ys have the same constant term in both equations( sign does not matter). In this case, we will make...
DN
Answered by Dermot N. • Maths tutor
4702 Views

A four sided pyramid, with a vertical height of 10cm and the base 4cmx4cm is placed on the top of a cylinder with radius 1.5cm and a height of 15cm. What is the exposed surface area?

Bottom end of cylinder = 1.5 2 x pi = 7.07cm 2 Cylinder shaft surface area = 3 x pi x 15 = 141.4cm 2 Top end of cylinder exposed = 0 Base of pyramid exposed = (4 x 4) - 7.07 = 8.9cm 2 Sides of pyramid = (use...
GW
Answered by George W. • Maths tutor
3468 Views

The mean mass of a squad of 19 hockey players is 82 kg A player of mass 93 kg joins the squad. Work out the mean mass of the squad now.

"Mean" stands for "average", so if you add the mass of all the players together, then divide by the amount of players, you get 82kg. [ (number of players) x (mean mass) = (sum of mass) ] ...
HH
Answered by Henry H. • Maths tutor
10442 Views

Solve the simultaneous equations: 2x - y = 1, 3x + y = 14

Make y the subject of equation 1:y = 2x - 1Substitute this value of y into equation 2:3x + (2x - 1) = 14Simplify:5x - 1 = 14Solve for x:x = 3Substitute this value of x into original equation:2(3) - y = 1Simp...
SB
Answered by Stephen B. • Maths tutor
4782 Views

solve simultaneous equations: 2x² + 3y² = 14 , x = 2y-3

x=1y=2 x= -29/11y=2/11
AG
Answered by alasdair g. • Maths tutor
7628 Views