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3 years ago

Function Not a function

Mathematics

1 answer:

Lerok [7]3 years ago

5 0

Answer:

A, B, and D.

Step-by-step explanation:

When one X-Intercept has two different Y-Intercepts, it is not a function.

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The equation x^2 + y^2 + 21 = 40 + 18y. What is the radius of this cookie?

trapecia [35]

Answer:

The radius is 10

Step-by-step explanation:

Given

$x^2 + y^2 + 21 = 40 + 18y.$

Required

The radius

Rewrite as:

$x^2 + y^2 - 18y = 40-21$

Subtract 81 from both sides

$x^2 + y^2 - 18y +81= 40-21+81$

Expand

$x^2 + y^2 - 9y - 9y +81= 40-21+81$

Factorize

$x^2 + y( y- 9) - 9(y -9)= 40-21+81$

Factor out y - 9

$x^2 + (y- 9) (y -9)= 40-21+81$

Express as squares

$x^2 + (y- 9)^2= 100$

$x^2 + (y- 9)= 10^2$

The equation of a circle is:

$(x - a)^2 + (y- b)= r^2$

By comparison:

$r^2=10^2$

$r = 10$

6 0

3 years ago

How many times is 10 as much as 46

Alexxandr [17]

4.6

10/46

10(x)=46
x=4.6

7 0

3 years ago

How to find percentile with mean and standard deviation

Reika [66]

Step-by-step explanation:

Step 1

Subtract the mean from your score. For example, if you scored 33 and the mean is 24, you would get a difference of 9.

Step 2

Divide the difference found in Step 1 by the standard deviation of the data to find the z-score, which is the number of standard deviations away from the mean that your score is. For example, if the standard deviation was 4.5, you would have a z-score of 2.

Step 3

Convert the z-score to a percentile using a z-score chart or converter available online (see Resources section). When converting, be sure to use a one-sided test. For example, a z-score of 2 would be in the 98th percentile.

4 0

2 years ago

An automobile uses gasoline at a rate of 35 mi/gal, which is the same as ________ km/l (1 km = 0.6214 mi, 1 gal = 3.78 l)

ANTONII [103]

R = Rate of gasoline by automobile = 35 mi/gal

it is given that , 1 kilometer = 0.6214 miles

and 1 gallon = 3.78 liter

R = 35 (miles/gallon) (1 kilometer/0.6214 miles) (1 gallon/3.78 liter)

R = (35) (1/0.6214) (1/3.78) (miles x 1 kilometer/1 miles) (1 gallon/(1 gallon x 1 liter))

R = 14.9 kilometer/liter

8 0

3 years ago