Ok, so we need to set up a system of equations.
x + y = 19, where x is notebooks and y is pencils
2.2x + 1.09y = 30.70. You use the coefficient for individual prices and the total for the total given.
2.2x + 2.2y = 41.8 (multiply for elimination later)
2.2x + 1.09y = 30.7
1.11y = 11.1
y = 11.1/1.11
y = 10
Now we use the substitution method in x + y = 19
x + 10 = 19
x = 9
9 notebooks and 10 pencils
1. You have the following information:
-The annual interest rate <span>is 7.2%.
- The </span><span>simple interest is calculated quarterly.
2. Then, to solve this exercise and calculate the </span><span>periodic interest rate of Marta's Account, you only have to divide the annual interest rate (7.2%) by 1/4 year. So, you have:
</span>
=(7.2%)(1/4)
=(7.2%)/4
=1.8%
<span>What is the periodic interest rate of Marta's Account?
The answer is: </span>1.8%
Answer:
15 sides
Step-by-step explanation:
Interior angle = {n - 2}{180/n}
156 = {n - 2}{180/n}
Cross multiply
156n = {n - 2}180
156n = 180n - 360
180n - 156n = 360
24n = 360
n = 369/24
n = 15
Answer:
2*4*6*8
Step-by-step explanation:
384 is the answer.
Notice that if you do minus or plus, you get a smaller number. So, this is indeed the highest number John could obtain.
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Answer:
10 ≤ x < ∞
Step-by-step explanation:
