teachers at price middle school are planning a birthday party for the principal. planners estimated that 42 slices of cake would be needed. in fact, only 30 slices of cake were eaten. what was the percent error in the estimate of how much cake was eaten?

a student solved the problem and showed his work below. what was his error?

|42-30|
(100) = 6%
42
1 the planners did not use the absolute error in the ratio.
2 the planners compared the absolute error to the approximate value.
3 the planners did not multiply by 100 to get the percent.
4 the planners divided incorrectly and got the wrong answer.

2./B. (Either way, it's the second answer)

Step-by-step explanation:

'The planners compared the absolute error to the approximate value.'

I just got the answer wrong twice and it showed the correct answer which is B./2.

Hope this helped! ^^

hello from mrbilldoesmath!

answer:   x^2 + y^2 = 1024

discussion:

the equation of a circle with center (h,k) and radius "r" is

(x-h)^2 + (y-k)^2 = r^2.

in our case

(x-0)^2 + (y-0) ^2 = 32^2 = 1024

you,

mrb

system of linear equation

step-by-step explanation:

as given in the data

a= 20 , b= -12

let us suppose that it is a straight line equation

now we know the formula for the system of linear equation

b= ma + c )

here m is slope of a straight line which is equal to formula

m=   (ii)

and here c is a constant

now putting the value of a and b in equation (ii)

m=

m=

putting the value of a,b and m in equation (i) gives us

-12 = + c

-12=-12 + c

adding 12 to both sides

-12 +12 = -12 +12 +c

0 =c

or c=0

as the value of the constant is zero which gives us that it is a linear equation and this order pair satisfies the system of linear equations.