4 years ago

Write the arithmetic series using summation notation. 7.5+13.5+19.5+25.5+31.5+37.5

Mathematics

1 answer:

Pavlova-9 [17]4 years ago

6 0

Answer:

135

Step-by-step explanation:

its easier to take out the decimal first then add the rest then add the decimals together then add the two numbers to get the final answer

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a circus charges $2.50 for kids tickets and $6 for adult tickets last week and twice as many kids attended the circus than adult

aliina [53]

Let
x-----------> the number of kids
y----------> the number of adults

we know that
2.5x+6y=$7150---------> equation 1
x=2y-------------> equation 2
substitute 2 in 1
2.5*[2y]+6y=7150-----> 5y+6y=7150----> 11y=7150-----> y=650
x=2y----> x=2*650----> 1300

the answer is
the number of kids is 1300

5 0

3 years ago

Clare is painting some doors that are all the same size. She used 2 liters of paint to cover 1 3/5 doors. How many liters of pai

barxatty [35]

Answer:

$1\frac{1}{4}\ liters$