nabiha

Solve the following simultaneous equation: 8x+3y=23 6x+5y=9

solve the following simultaneous linear equation: -5x+6y=44 9x+7y=-8

solve: y=x-1, y=x squared+2x-7

The width of a rectangular photograph is 5cm more than the height. The area is 80cm squared. Find the height of the photograph.

solve h(x+5) = 80 as a quadratic

The probability that Richard beats John at badminto is 0.7. The probability that Richard beats John at sqaush is 0.6. These events are independant. Calculate the probabilty that, in a week when they play one game of badminton and sqaush: a) Richard wins b...

a cylindrical cake with radius 12cm and height 10cm has a slice cut out. The shape of the top of the slice is a sector of the circle that forms the top of the cake. a) Calculate the area on top of the slice that has been cut out. b) Calculate the volume o...

rationalise 5+2square root 5 divided by square root 5. please can someone help me on how to get the answer 2+square root 5

How is root245 7root5, how do you work it out? isnt 5*43 245 and you cant simplify that further?

solve the simultaneous equations: y=x-2 ysquared+xsquared=10

the diaphram relaxes when you inhale providing a large volume in the thorax, the diaphram contacts when you exhale so a smaller volume

but how do u solve h(x+5)=80 i have never come across ones like these.

i know its listed as anonomous above but its me really so ive given you basically my how i worked out a and b including the vital answers.

this is me nabiha named anonymous

sector angle is 320 degrees without sliced cut which is therefore 40 degrees

why is it a 60 degrees central angle? arent you supposed to break the cylindrical cake into parts: top and bottom, 2 rectangles where the slice has been cut inside, outside curved when opened out becomes long rectangle?? then work out the area of each par...

not tops and bottoms, i mean like you have to work out the area of the top of the cake using the sector 320 degrees, but there is also a bottom so you therefore have to multiple it by 2. same with when you cut the slice- there are 2 rectangular sides. obv...

no its leaving 40 degrees of the cake left, 320 is wot is there

ok, but what about question c) what formulas would I use, is my method correct?

that is by using sections and work out the area of the 3 parts: 1)rectangle * 2(shown by the slice being cut), 2)long rectangle around cake (stops when you get to slice) and finally 3)the top and bottom of the cake ( angle is 320) how do I work out the ar...

thankyou, I wanted to know whether I was right or the textbook because it was very rare that they make mistakes, I wanted to clarify whether it makes sense to add the 2 sides area=240. I thought it did so Im going to leave it how I did it.