YEAR 9 MATHS PLEASE HELP ME The pictures are in order - first being dwayne's and second being ivor's Dwayne Pipes uses this formula to work out the cost of a plumbing job in pounds.
Ivor Wrench uses this formula to work out the cost of a plumbing job in pounds. A job of x hours costs the same with Dwayne and Ivor.
Set up and solve an equation to work out x .
X=.

Step-by-step explanation:

So we have two equations.

y=35x+40

y=40x+17.5

We want to find the coordinates in which they intersect.

BUT They never intersect, They are parallel to each other leaving us with a

NO SOLUTION

When you are trying to solve for x you want to get rid of the y's and simply put on your paper:       35x+40 = 40x+17.5

Then you distribute, in which I am not going to show because that too many steps lol. But you'll get:

x=4.5

0.02

step-by-step explanation:

time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 k (but other seconds are sometimes used in astronomy)

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.