Answer:
11 pennies and 9 nickels
Step-by-step explanation:
Set up a system of equations where p is the number of pennies and n is the number of nickels:
p + n = 20
0.01p + 0.05n = 0.56
Solve by substitution by rearranging the first equation:
p + n = 20
p = 20 - n
Then, plug this in as p into the second equation, and solve for n:
0.01p + 0.05n = 0.56
0.01(20 - n) + 0.05n = 0.56
0.2 - 0.01n + 0.05n = 0.56
0.2 + 0.04n = 0.56
0.04n = 0.36
n = 9
Then, plug this into the first equation to solve for p:
p + n = 20
p + 9 = 20
p = 11
So, Jayden has 11 pennies and 9 nickels
If you would like to solve 7x + 9 = 6x - 5 for x, you can do this using the following steps:
<span>7x + 9 = 6x - 5
</span>7x - 6x = -5 - 9
x = - 14
The correct result would be x = - 14.
Answer:
9,-8
Step-by-step explanation:ugycytif
38.71428571428571 or 38.7
Answer:
And using the second point we have this:
If we divide both sides by 18 we got:
And taking the square roof of 16 we got:
But on this case the negative solution not makes sense since the function is increasing so then the correct exponential function that pass through the points (0,18) and (2,288) is:
Step-by-step explanation:
We want to construct an exponential function given by this general form:
And we know that the function needs to pass for two points (0,18) and (2,288). Using the first point we have this:
And using the second point we have this:
If we divide both sides by 18 we got:
And taking the square roof of 16 we got:
But on this case the negative solution not makes sense since the function is increasing so then the correct exponential function that pass through the points (0,18) and (2,288) is: