Answer:
Option D.
Step-by-step explanation:
Juanito estimated that 31% of 517 is 204 is estimated wrong because
31% of 517 = 0.31 × 517 = 160.27
Now we will go through all the options.
A. 30% of 520 = 0.30 × 520 = 156
B. 40% of 520 = 0.40 × 520 = 208
C. 30% of 510 = 0.30 × 510 = 153
D. 40% of 510 = 0.40 × 510 = 204
Option D.
If you divide 4/5 you get 80%. Then if you divide 4/9 you get .4444444 which means Nicole's friend only ran 44% of Nicole's distance. That's what i got from there. You might have to multiply more, but that's all I've got from the information you gave me
9.35 times 10 to the second power
Answer:
One possibility is to work for (10) hours as a babysitter, and (10) hours as a cashier.
Step-by-step explanation:
An easy way to solve this problem is to set up a system to model the situation. Create one equation to model the money make, and the other to model the time spent. Let parameters (x) and (y) represent the time one spends at each job.
Since one cannot spend more than (20) hours a week working, set the first equation, for time, equal to (20),
x + y = 20
Now multiply each unit for the time by the money earned at each job, set this new equation equal to (150), the minimum amount of money one wishes to earn,
6(x) + 9(y) = 150
Thus the system is the following,
Now use the process of elimination. The process of elimination is when one multiplies one of the equations by a term such that when one adds the two equations, one of the variables cancels. One can solve for the other variable, and then backsolve for the first variable. Multiply the first equation by (-6) so that the variable (x) cancels.
Add the two equations,
Use inverse operations to solve for (y),
Now substitute the value of (y) back into one of the original equations and solve for (x),
Answer:
<h2>C=P-0.4x</h2>
Step-by-step explanation:
Step one:
we want to find the expression for the cost of any type of shirt for an applied discount of 40%.
let the price of any shirt be P
let the cost of any shirt be x
and also the price after discount applied be C
Step two:
The discount is
=40/100*x
=0.4*x
=0.4x
Hence the cost of the shirt will be the initial cost minus the discount
C=P-0.4x