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Solve the simultaneous equations. 3x + 5y = 1 , 2x - 3y = 7

3x + 5y = 1 (eq 1) 2x - 3y = 7 (eq 2) Step 1 - 2* (eq 1) 6x + 10y = 2 (eq 3) Step 2 - 3* (eq 2) 6x - 9y = 21 (eq 4) Step 3 - eq 4 - eq 3 to cancel the x -19y = 19 Therefore, y = -1 (eq 5) Step 4 - sub (eq 5)...
AL
Answered by Ann L. • Maths tutor
15289 Views

A circular table top has diameter 140 cm. The volume of the table top is 17,150π cmᶟ. Calculate the thickness of the table top

The table is a cylinder so we'll need to use the equation for this shape: A = πr 2 h We're looking for the thickness of the table (which is the height) so let's rearrange this equation to make h the subject ...
LM
Answered by Lewis M. • Maths tutor
9436 Views

A circular table top has diameter 140 cm. Calculate the area of the table top in cm² , giving your answer as a multiple of π.

So we know the formula for the area of a circle: πr 2 So all we need to find is the radius 2 Radius = Diameter / 2 (Half the diameter) = 70 Radius 2 = 70 2 = 4900 Therefore using our original equation: πr 2 ...
LM
Answered by Lewis M. • Maths tutor
5665 Views

How do you conjugate the Conditional Tense?

The endings are the same for ER, IR and RE. The endings are all the same as the Imperfect Tense endings: Je regarder ais , Tu regarder ais , Il regarder ait, Nous regarder ions , Vous regarder iez , Ils rege...
PD
Answered by Pauline D. • French tutor
2528 Views

What are Mendel's two laws of inheritance?

Mendel's two laws of inheritance are: the law of segregation and the law of independent assortment.
SP
Answered by Sara P. • Biology tutor
6052 Views