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Expand (2x-4)(x+3)

We are going to use the F.O.I.L Method for this expansion, FIRST 2x*x = 2x 2 OUTSIDE 2x*3 = 6x INSIDE -4x*x = -4x LAST -4*3 = -12 Now to add up all the terms we have found 2x 2 +6x-4x+12 = 2x 2 +2x+12
KP
Answered by Kate P. • Maths tutor
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Q = P / (R (4-t)), P=36, R= 3, t=-2

Substitute in each letter for the appropriate number that it equals. Q = 36 / (3 x (4--2)) Q = 36 / (3x(4+2)) Q = 36 / (3x6) Q = 36 /18 Q = 2
MR
Answered by Michelle R. • Maths tutor
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An ice cream cone with a base 4.5 cm in diameter and whose height is 10 cm is filled with ice cream. What is the volume of ice cream to 3 d.p.? If the density of ice cream is 1095 kg/m^3, what is the mass of ice cream in 5 cones to 3 s.f.?

Volume of cone= 1/3 Pi h r^2 r=2.25 V=1/3 Pi 10 2.25^2=53.01 cm^3=5.301x10&-5 m^3 Mass=density*volume Mass=(5.301x10^-5) 1095= 0.05805 kg Mass of 5= 0.05805 5=0.290 kg
BJ
Answered by Bevan J. • Maths tutor
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1iii) Solve 7/2x^2+13/4x+1=2

In order to solve this trickier problem, the quadratic equation must be applied x=[-b +- sqrt(b^2-4ac)]/2a Apologies for messy notation, full solution will be demonstrated during interview clearly when white...
KI
Answered by Kishwar I. • Maths tutor
3998 Views

1ii) sketch y=x^2-4x-21

A parabola shape with x intercepts at x = -3 and x = 7 and the y intercept at y = -21
KI
Answered by Kishwar I. • Maths tutor
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