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Crazy boy [7]
3 years ago
6

Barbara went ice skating. It cost $5.85 to rent the skates, $2.50 for nachos, and it cost $1.95 per hour to skate. If she skates

for 2 1/2 hours, how much does she spend?
Mathematics
1 answer:
muminat3 years ago
4 0
5.85+2.50+1.95 x 2.5=13.225
Barbara spends $13.23. Hope I helped.
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Please help i dont get this at all so please i will highly appreciate it .Thank youuu!!!
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Answer:

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Step-by-step explanation:

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Please help i dont know how to solve
iren [92.7K]

Answer:

31°

Step-by-step explanation:

Angle KLN and Angle MLN equal 160° as said in the directions.

So 2y° + (3y + 5)° = 160° –– Combine like terms

5y + 5° = 160° ––Subtract 5 from both sides

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3 years ago
Rationalize the denominator of square root of negative 49 over open parentheses 7 minus 2 i close parentheses minus open parenth
navik [9.2K]

The answer is the option d, which is: d) \frac{-77+21i}{130}

The explanation for this problem is shown below:

1. Smplify the denominator and rewrite the numerator in this form:

\frac{7i}{7-2i-4-9i} \\\frac{7i}{3-11i}

2. Multiply the denominator and the numerator by the conjugated (3+11i) and simplify the expression, as following:

\frac{7i(3+11i)}{(3-11i)(3+11i)} \\ \frac{21i+77i^{2}}{121+9}  \\ \frac{-77+21i}{130}

3. As you can see, you obtain the expression shown in the option mentioned above.

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4 years ago
Find the Product. Simplify Your Answer. <br> (2c–3)(–c^2–3c+3)
photoshop1234 [79]

Answer:

should be −2c3−3c2+15c−9

Step-by-step explanation:

hope this helps!!

5 0
3 years ago
Read 2 more answers
kristen invests money in a bank and makes no additional deposits or withdrawals. The bank pays 1.4% interest compounded annually
frosja888 [35]

Answer:approximately 50 years.

Step-by-step explanation:

Let $P represent the initial amount that she deposited. It means that principal,

P = $P

It was compounded annually. This means that it was compounded once in a year. So

n = 1

The rate at which the principal was compounded is 1.4%. So

r = 1.4/100 = 0.014

The formula for compound interest is

A = P(1+r/n)^nt

A = total amount in the account at the end of t years. For the initial amount to double, it means that

A = 2P

Therefore

2P = P (1+0.014/1)^1×t

2P/P = (1.014)^t

2 = (1.014)^t

Taking log to base 10 of both sides, it becomes

Log 2 = log 1.014^t

Log 2 = tlog 1.014

0.301 = 0.006t

t = 0.301/0.006 = 50.2 years

4 0
3 years ago
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