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2 years ago

2 1/2- 1 2/5 this question I am stuck on some one please help :)

Mathematics

1 answer:

Umnica [9.8K]2 years ago

8 0

Answer:

1. Make imporper franctions: 2 1/2 = 5/2 1 2/5 = 7/5

2. Find common denominater: using 10

5/2 = 25/10 7/5 = 14/10

3. Simplify.

25/10 - 14/10 = 11/10

= 1 1/10

Step-by-step explanation:

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What is the area of a circle with a radius of 15 feet?

Svet_ta [14]

Answer:

A≈706.86ft²

Step-by-step explanation:

A=πr2=π·152≈706.85835ft²

rounded two decimal places= 706.86

6 0

4 years ago

Suppose the time a child spends waiting at for the bus as a school bus stop is exponentially distributed with mean 7 minutes. De

Gala2k [10]

Answer:

The probability that the child must wait between 6 and 9 minutes on the bus stop on a given morning is 0.148.

Step-by-step explanation:

Let the random variable <em>X</em> represent the time a child spends waiting at for the bus as a school bus stop.

The random variable <em>X</em> is exponentially distributed with mean 7 minutes.

Then the parameter of the distribution is, $\lambda=\frac{1}{\mu}=\frac{1}{7}$ .

The probability density function of <em>X</em> is:

$f_{X}(x)=\lambda\cdot e^{-\lambda x};\ x>0,\ \lambda>0$

Compute the probability that the child must wait between 6 and 9 minutes on the bus stop on a given morning as follows:

$P(6\leq X\leq 9)=\int\limits^{9}_{6} {\lambda\cdot e^{-\lambda x}} \, dx$

$=\int\limits^{9}_{6} {\frac{1}{7}\cdot e^{-\frac{1}{7} \cdot x}} \, dx \\\\=\frac{1}{7}\cdot \int\limits^{9}_{6} {e^{-\frac{1}{7} \cdot x}} \, dx \\\\=[-e^{-\frac{1}{7} \cdot x}]^{9}_{6}\\\\=e^{-\frac{1}{7} \cdot 6}-e^{-\frac{1}{7} \cdot 9}\\\\=0.424373-0.276453\\\\=0.14792\\\\\approx 0.148$

Thus, the probability that the child must wait between 6 and 9 minutes on the bus stop on a given morning is 0.148.

6 0

3 years ago

Solve for a. Correct answer gets BRAINLIEST

Darina [25.2K]

Hey there!!

Equation given :

A = h ( a + b ) / 2

Multiply by 2 on both sides

2A = h ( a + b )

Divide by h on both sides

2A / h = a + b

Subtract by b on both sides

2A / h - ( b ) = a

Hence, the option ( a ) is the correct answer

Hope my answer helps!

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3 years ago

What is 400 divided by 1 million

Monica [59]

400 divided by 1 million can be given as:

400/1000000

finding gcf of 400 and 1000000

gcf of 400 and 1000000 is 400

dividing both numerator and denominator by 400 we get

1/2500

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3 years ago

Read 2 more answers

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Mandarinka [93]

Step-by-step explanation:

x-3/4=5 1/6

(4x-3)/4=31/6

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12x-9=62

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6 0

3 years ago