30b + 100u = 900
5b + 25u = 200....multiply by -6
------------------
30b + 100u = 900
-30b - 150u = - 1200 (result of multiplying by -6)
------------------add
-50u = - 300
u = 6 <== upgrated phones sold
30b + 100u = 900
30b + 100(6) = 900
30b + 600 = 900
30b = 900 - 600
30b = 300
b = 10 <== basic phones sold
Answer:
D.A(n) = 250 + (n – 1)(0.03 • 250); $347.50
Step-by-step explanation:
we know that
The simple interest formula is equal to
where
A is the Final Investment Value
P is the Principal amount of money to be invested
r is the rate of interest
t is Number of Time Periods
in this problem we have
substitute in the formula above
Answer: There are 310 pots that have three different colored balloons attached.
Step-by-step explanation:
Since we have given that
Number of crab pots in the bay = 600
Part of red balloon = 
Part of blue balloon = 
Part of yellow balloon = 
So, Number of pots that have different colored balloons attached is given by
Hence, there are 310 pots that have three different colored balloons attached.
The correct answer is B hope this helps you.!
The non-terminating decimal that can be converted into a rational number is given by:
0.321321321.
<h3>What are rational and irrational numbers?</h3>
- Rational numbers are numbers that can be represented by fractions, with examples such as numbers that have no decimal parts, or numbers in which the decimal parts are terminating or repeating.
- Irrational numbers are numbers that cannot be represented by fractions, being non-terminating and non-repeating decimals, such as non-exact square roots, and the most common example of an irrational number is the number pi = 3.1415....
In the context of this problem, we are given four non-terminating decimal numbers, in which the only one with a repeating decimal pattern is:
0.321321321...
In which the pattern is:
321.
Hence the number can be written as the following rational number = fraction:
321/999.
With 999 being due to the fact that the repeating pattern is composed by three digits.
More can be learned about rational numbers at brainly.com/question/12088221
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