Answer:
B x=3
Step-by-step explanation:
12x = 2x^2 +18
Divide by 2
12x/2 = 2x^2/2 +18/2
6x = x^2 +9
Subtract 6x from each side
6x-6x = x^2 -6x+9
0= x^2 -6x+9
Factor
What 2 numbers multiply to 9 and adds to -6
-3*-3 = 0
-3+-3 =-6
0= (x-3) (x-3)
Using the zero product property
x-3 =0 x-3 =0
x=3 x=3
Sin = opposite/hypotenuse, so one side is 7 and the other is 8.
sqrt(64-49)=sqrt(15) which is the third side, and tangeant = opposite/adjacent, which is 7/sqrt(15). Cotangeant is 1/tangeant, so it would be sqrt(15)/7
ok so 10 pennis is 1 dime which is 10 cents ok lets go to the next number 20 pennis will be 2 dimes because its the same cents then 30 pennis will be 3 and 40 will be 4 so just divide 10 into the number of pennis or in this case you have a easy out you can just use the numbers infront of the zero since you are talking about dimes.
It would even be the same if you had 2,300 pennis you would have 230 dimes
Answer:
$3.90
The cost of making them all is 1.50 subtracted from the profit he made
17.5
5 is the og length. Scale factor is 3.5. So
5(3.5)=17.5
