Circumference of a circle is 2 x pi x r
Let x represent the number of liters of 50% acid Theresa puts into the mix. The the number of liters of 30% acid will be (420-x). The total amount of acid in the final solution will be ...
0.50x + 0.30(420-x) = 0.45(420)
0.20x + 126 = 189 . . . . . . . . . . . . . . . simplify
0.20x = 63 . . . . . . . . . . . . . . . . . . . . . subtract 126
x = 63/0.20 = 315 . . . . . . . . . . . . . . . liters of 50% solution
(420-x) = 420-315 = 105 . . . . . . . . . liters of 30% solution
Theresa should mix ...
105 liters of 30% solution
315 liters of 50% solution
Answer:
110kg
Step-by-step explanation:
You multiply 100 by 0.1 (because this is 10% as a decimal number) and you get 10. Add 10 to 100
The length of side A in centimeters is 6cm
D. 6
Answer:
c. 4.27
Step-by-step explanation:
We have been given the regression equation of for predicting number of speeding tickets (Y) from information about driver age (X) as 
.
To find the predicted number of tickets for a twenty-year-old, we will substitute 
in our given equation.
Therefore, the predicted number of tickets for a twenty-year-old would be 4.27 tickets.
