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What is the subjunctive in French?

It is a tense to express a doubt or a wish such as "I wish it were sunny." It's constructed in the present tense by taking the 'Ils' form, removing the ending and adding e, es, e, ions, iez, ent. I...
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Answered by Lydia T. • French tutor
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How do I expand the following equation (x+4)(x+2)

When dealing with questions to do with expanding brackets, you must multiply every term in one bracket with all the others in the second bracket. So for this question, we can see we have 4 terms in total: Le...
HM
Answered by Henry M. • Maths tutor
20327 Views

How do you solve simultaneous equtions?

Say you had two equtions to solve simultaneously. Example 1: x + 5y = -7; 2x - 2y = 10 Multiply one of the equtions so that one of the variables has the same coefficient. In this example, I would multiple th...
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How do you solve simultaneous equations and why do you do it?

Solving simultaneous equations allows you to identify at which point on a graph two lines intersect. For example, take the straight line -x + y = 2 and parabolic curve y= x 2 Firstly, let's re-arrange the st...
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Answered by Peter H. • Maths tutor
4820 Views

How do I calculate the relative formula mass of FeSO4 and the number of moles, when the formula mass of O=16, S=32, Fe=56 and the mass of FeSO4= 380g

The formula mass (Mr) of FeSO4 is the total mass of all the individual elemenets added together. So the Mr of FeSO4 = (1 x Fe) + (1 x S) + (4 x O) = 56 + 32 + 4x16 = 152 To calculate moles, the equation for ...
HM
Answered by Henry M. • Chemistry tutor
73997 Views