Answer:
(a) $60 | (b) $660
Step-by-step explanation:
We can use the simple interest formula for this:
<em>I = interest amount</em>
<em>P = principal amount</em>
<em>r = interest rate (decimal form)</em>
<em>t = time (years)</em>
<em />
First, change 5% into its decimal form:
5% -> 
-> 0.05
Next, plug in the values into the equation:
<em>The interest earned is $60. To find the total balance, just add the $600 back.</em>
The total interest earned is $60 and the total is $660.
Answer:
v = 1
Step-by-step explanation:
-6(7v - 5) - 3 = 3(v - 6)
distribute -6 into 7v - 5
-42v + 30 - 3 = 3(v - 6)
distribute 3 into v - 6
-42v + 30 - 3 = 3v - 18
add 30 and -3 together
-42v + 27 = 3v - 18
subtract 3v from both sides
-45v + 27 = -18
subtract 27 from both sides
-45v = -45
divide by -45 on both sides
v = 1
I don't understand or see for the matter the question what is it
Answer:
two (n = 4, and n = -1)
Step-by-step explanation:
Let's solve it as follows:
First, we can divide out the common factor of 3 from each side, to get:
n(2n-8) = 8 -2n
Next, we expand, and move all the terms over to the right hand side (so that we have 0 on the LHS - as this is how we will want to solve the quadratic equation):
2n^2 - 8n - 8 +2n = 0
2n^2 - 6n - 8 = 0.
We also see we can further simplify by dividing out the factor of 2, to get:
n^2 -3n -4. = 0
Next, as this is a quadratic, the usual next step is to factorise, to get:
(n-4)(n+1) = 0
So we see that n = 4 and n = -1 are the two solutions.
