Help!! Im stuck on this question!

Help!! Im stuck on this question!

rates question please help.

please help i'm stuck on this formula questions

I just need help with my homework

A substance is 99% water .some water evaporates leaving a substance that is 98%water.how much of the water evaporated?

im stuck on this question

idk it pls help

What 4 numbers multiplied with each other equals the same 4 numbers added to each other equals 20?

because e.g.:3n+9

No further description

simplify the perimeter of a triangle( 8x-8w)+(3x+8y)+(4y+4w)

calculate the formula using bidmas without a calculator

Find the volume of the pile of soil excavated from a trench 650mm wide, 95cm deep and 6.51m long. Assume the loose; excavated soil volume increases by 12% (the bulking factor). Give your answer in...

I do not know the answer to this question

Find the resultant of each pair of phasors with an angle between -90° and 90° R=12 <0 degrees kohms, Xl=18<90 degrees kohms

Y=x2-2x-3

a traffic cone is made from a cuboid and a cone.the cone has a diameter of 36cm and a slant height of 90cm, and it sits exactly in the middle on the cuboid base. the cuboid base has sides of 44am...

For some reason 1+i = root 2 * e ^ pi / 4 which i dont understand how so I would like an explanation for this...

1/a2sin2x-cos2x

How do I do this?