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Mathematics

1 answer:

Marizza181 [45]2 years ago

4 0

Answer:

all of above brainliest appreciated

Step-by-step explanation:

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Patricia had less than $9 to spend at the grocery store. she bought 1 pound of tomatoes and wanted to spend the rest of her mone

shepuryov [24]

2.40+2.20=4.60

9-4.60=4.40

Patricia has $4.40 left to spend (or save)

3 0

2 years ago

Read 2 more answers

Find the missing length <br> . Leave your answers in simplest radical form

KIM [24]

Use the Pythagorean theorem:

$x^2+7^2=14^2\\\\x^2+49=196\qquad\text{subtract 49 from both sides}\\\\x^2=147\to x=\sqrt{147}\\\\x=\sqrt{49\cdot3}\\\\x=\sqrt{49}\cdot\sqrt3\\\\\boxed{x=7\sqrt3\ mi}$

$x^2+9^2=(\sqrt{226})^2\\\\x^2+81=226\qquad\text{subtract 81 from both sides}\\\\x^2=145\to \boxed{x=\sqrt{145}\ km}$

5 0

2 years ago

A Ferris wheel travels in a circular motion and measures 40 meters from the top car to the bottom car. What is the length of the

luda_lava [24]

Answer:

20 m

Step-by-step explanation:

The distance from the top car to the bottom car is equal to the diameter of the wheel. The diameter is 40 m, and that is twice the radius. The radius of the Ferris wheel is (40 m)/2 = 20 m.

5 0

2 years ago

Jerry took a sample of 4 employees in his office and observed how many hours they each worked one day.

Illusion [34]

The error in Jerry's calculation is 4.84

The number of employees, N = 4

The mean is calculated as:

$\mu = \frac{10+2+4+8}{4} \\\mu = \frac{24}{4} \\\mu = 6$

The formula for the standard deviation is:

$SD =\sqrt{\frac{\sum{(x-\mu)^2}}{N} }$

This can be further calculated as:

$SD = \sqrt{\frac{(10-6)^2+(2-6)^2+(4-6)^2+(8-6)^2}{4} }\\\\SD = \sqrt{\frac{4^2+(-4)^2+(-2)^2+(2)^2}{4} } \\\\SD = \sqrt{\frac{16+16+4+4}{4} } \\\\SD = \sqrt{\frac{40}{4} } \\\\SD = \sqrt{10} \\\\SD = 3.16$