Alexander uses cupric chloride to etch circuit boards. He recorded the room temperature, in °C, and the um
etching rate, in of the cupric chloride.
min
After plotting his results, Alexander noticed that the relationship between the two variables was fairly
linear, so he used the data to calculate the following least squares regression equation for predicting the
etching rate from the room temperature:
1
9 =21
+
What is the residual if the room temperature was 25 C and the cupric chloride had an etching rate of
um
5 ?
min

(x3 + 6x2 + 2x - 6) • (x - 1)

step-by-step explanation:

polynomial long division :

3.2     polynomial long division

dividing :   x4+5x3-4x2-8x+6

                              ("dividend")

by         :     x-1     ("divisor")

dividend     x4   +   5x3   -   4x2   -   8x   +   6

- divisor   * x3     x4   -   x3            

remainder         6x3   -   4x2   -   8x   +   6

- divisor   * 6x2         6x3   -   6x2        

remainder             2x2   -   8x   +   6

- divisor   * 2x1             2x2   -   2x    

remainder               -   6x   +   6

- divisor   * -6x0               -   6x   +   6

remainder                     0

quotient :   x3+6x2+2x-6   remainder:   0

answer

a,b, and d

explanation

a reflection angle is more than

but less than;

an angle that measures

is a reflex angle.(true)

an angle that measures less than

is acute.(true)

provided we are considering angles greater or equal to zero.

an acute angle lies in the range.

an obtuse angle is less than 180° but more than 90°

an angle that measures 300° is obtuse (false)

an angle that measures 65° is an acute angle.(true)

answer: (1,3) (3,-1) (5,-5) ?

step-by-step explanation:

idk wbu

step-by-step explanation: