Answer:
3 oz
Step-by-step explanation:
Let x represent the number of oz. of the medal with 40% gold:
Set up an equation and solve for x:
0.4x + 7(0.9) = 0.75(x + 7)
0.4x + 6.3 = 0.75x + 5.25
6.3 = 0.35x + 5.25
1.05 = 0.35x
3 = x
So, you will need 3 oz. of the metal with 40% gold
Answer:
x^2+2x
Step-by-step explanation: You would take x and multiply it by x and get X^2 then you would take x anm multiply it by 2 to get 2x. It is distributing
We have been given that a customer charges a treadmill at Annie's Sport Shop. The price is $4,000 and the financing charge is 6% per annum if the bill is not paid in 30 days. We asked to find the amount of finance charges.
We will use simple interest formula to solve our given problem.
, where
I = Amount of interest,
P = Principal amount,
r = Annual interest rate in decimal form,
t = Time in years.
Since our time if given in days, so we need to convert 30 days into year.
1 year = 365 days,
30 days = 
year
Upon substituting our given values in simple interest formula, we will get:
Upon rounding to nearest whole number, we will get:
Therefore, the amount of finance charge will be $20 and option 'b' is the correct choice.
Answer:
Step-by-step explanation:
Nora worked in her yard for 2 hours. She mowed for 45 minutes. We would convert the 45 minutes to hours.
60 minutes = 1 hour
45 minutes = 45/60 = 3/4 hours
She raked for 33 minutes. Converting 33 minutes to hours,
33 minutes = 33/60 = 11/20
She weeded the garden for the rest of the time.
Time spent on weeding the garden = total time spent in the garden - sum of the time spent on mowing and raking.
Time spent on weeding = 2 - (3/4+11/20) = 2 - 26/20
= 14/20 = 0.7 hours
The percentage of Nora's time working in her yard that was spent weeding the garden will become
0.7/2 × 100
= 35%
