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5 tins of soup have a total weight of 1750 grams. 4 tins of soup and 3 packets of soup have a total weight of 1490 grams. Work out the total weight of 3 tins of soup and 2 packets of soup.

Let tins be represented by XLet packets be represented by Y 5X= 1750X=350 4X+3Y=14904(350)+3Y=14901400+3Y=14903Y=90Y=30 3X+2Y= (3x350) + (2x30)= 1050+ 60= 1110
JC
Answered by Joe C. • Maths tutor
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A-level - How to differentiate e^x where x is more complicated?

For exampe: e 4x^3 The way to look at this is, the differential of e 4x^3 = the expression itself ( e 4x^3 ) multiplied by the differential of whatever e is to the power of.In this example the differential o...
JC
Answered by Jake C. • Maths tutor
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Find an equation for the straight line connecting point A (7,4) and point B(2,0)

In this question we will use the fact we know a straight line can be written in the form (y-y 1 )=m(x-x 1 ). Where m is the gradient and (x 1 ,y 1 ) is a point on the line. We already have a point A so can s...
HM
Answered by Hannah M. • Maths tutor
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An triangular prism has base xcm, height (x+4)cm and length 4xcm. Find the volume of the prism in terms of x. Find the volume when x=2cm.

This question combines knowledge of volume equations with using unknown variables. We know the volume of a prism is the area of the face multiplied by the length. The first step would be to find the area of ...
MP
Answered by Megan P. • Maths tutor
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Make "a" the subject of the following equation: 2b = (3a+4)/(c-a)

In order to solve this question, we need to have all the terms containing 'a' on one side of the equals sign, and the other terms on the other side of the equals sign. First, we multiply both sides by (c-a),...
TD
Answered by Tutor161443 D. • Maths tutor
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