I teach you students to factor each term
26n^5 = 2 x 13 x n x n x n x n x n
12n^3. = 2 x 3 x n x n x n
Answer:
The answer is 2.44948974278 or 2.4.
Step-by-step explanation:
Hope this helps. Good luck!
Answer:
120
Step-by-step explanation:
We can break it up and then solve. 15*2 is 30. 30*4 is 120.
Let's have a variable for each rate
x = account 1 (2.5% rate of interest)
y = account 2 (8% rate of interest)
The formulas we need are:
0.025x + 0.08y = 830 (amount of interest paid)
x + y = 20 000 (combined amount invested)
To solve we will use substitution (isolate for one variable and plugging into the other formula):
x + y = 20 000
x = 20 000-y
0.025x + 0.08y = 830
0.025(20 000-y) + 0.08y = 830
500-0.025y+0.08y=830
500+0.055y=830
0.055y=330
y=6000
Now that we know y (the 2nd account) = $6000 we need to find x. We do this by using the previous formula.
x = 20 000-y
x=20 000 - 6000
x=14000
She invested $14 000 at a 2.5% interest rate and $6 000 at a 8% interest rate.
*Notes:
the percentages were converted into decimal form
you check your answer by plugging the numbers back into the 2 formulas we made
Answer:
Step-by-step explanation:
15/2=75/x
Cross multiply
15x=150
x=10
