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oee [108]
3 years ago
10

The area of a square of a square is equal to the area of a circle, whose diameter is 10. What is the length of a side of the squ

are?
Mathematics
1 answer:
Anna71 [15]3 years ago
5 0
If the circle has diameter 10,
A=πr²
A=25π

if there area of a square is 25π, then a side measures√(25π) = 5√π
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What is the value of f(-1) when f(x)=2x+2? F(-1)=?
igomit [66]

Here is your function:

f(x)=2x+2

You're looking for f(-1). To get your answer, you have to replace all the x's with -1.

Here is your new equation:

f(-1) = 2(-1)+2

Multiply 2 by -1

2 \times -1 = -2

<em>Remember:</em>

MULTIPLYING

  • Positive(+) times negative(-) is equal to negative
  • Positive(+) times positive(+) is equal to positive
  • Negative(-) times negative(-) is equal to positive
  • Negative(-) times positive(+) is equal to negative

DIVIDING

  • Positive(+) divided by positive(+) is equal to positive
  • Positive(+) divided by negative(-) is equal to negative
  • Negative(-) divided by positive(+) is equal to negative
  • Negative(-) divided by negative(-0 is equal to positive

Since you're multiplying a negative number by a positive number, the answer will be negative.

Here is your new equation:

f(-1) = -2+2

Add -2 and 2:

-2+2 = 0

That means your answer is 0

        ↓

f(-1)=0

<em>If you have any questions, feel free to ask in the comments! :)</em>

5 0
4 years ago
During an experiment, a spinner landed on green 9 times, which resulted in an experimental probability of StartFraction 1 over 6
ANTONII [103]

Answer:

Mary is incorrect

Step-by-step explanation:

We are given the following in the question:

Number of times the spinner landed on green color = 9

P(Green) =

\dfrac{1}{6}

Mary claimed that there must be 45 trials.

\text{Probability} = \displaystyle\frac{\text{Number of favourable outcomes}}{\text{Total number of outcomes}}

P(Green) =

\dfrac{\text{Number of times spinner landed on green}}{\text{Total number of trials}}\\\\\Rightarrow \dfrac{9}{x}=\dfrac{1}{6}\\\\\Rightarrow x  = 9\times 6 = 54

There are 54 trials in the experiment and not 45 trials. Thus, Mary is incorrect.

4 0
3 years ago
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Ms. Ashley planned to stay at a hotel that charges $88 per night for a room and $20 per night in fees and taxes. She used this e
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Step-by-step explanation:

Since 88 is for one night and 20 per night in fees and taxes.

Step 1 : Calculate for $88

\frac{88n}{88}  \\make N the subject of formula

n =  \frac{88}{88}  \\

N= 1

Step 2: Calculate for $20

\frac{20n}{20}  \\

make N the subject of formula

n =  \frac{20}{20}

N = 1

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A motorboat travels 448 kilometers in 8 hours going upstream and 516 kilometers in 6 hours going downstream. What is the rate of
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