Answer:
−4x^3+12
Step-by-step explanation:
2+3x^3-7x^3+10
simplify this
−4x3+12
Answer:
Part a) 
Part b) 
Step-by-step explanation:
Part a)
Let
x -----> the number of weeks
y ----> the total amount Chem has deposited in a saving account
we know that
The equation of a line in slope intercept form is

where
m is the rate or slope of the linear equation
b is the y-intercept of the linear equation or initial value (value of y when the value of x is equal to zero)
In this problem we have that
The rate or slope is equal to
-----> amount deposited by Chem each week
The y-intercept or initial value is
----> amount deposited originally in the saving account
substitute the values

Part b) How much has Chem deposited 30 weeks after his initial deposit?
For x=30 weeks
substitute in the equation


Answer:
46
Step-by-step explanation:
Two tangents to a circle from the same external point are congruent.
There are 4 pairs of congruent tangents in the figure.
Starting at the lower left and going clockwise gives
perimeter = 6 + 6 + 8 + 8 + 4 + 4 + 5 + 5 = 46 units