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3 years ago

AB is tangent to circle O at B. What is the length of the radius r? Round to the nearest tenth.

Mathematics

1 answer:

Savatey [412]3 years ago

3 0

$Use\ Pythagorean\ theorem.\\\\r^2+10^2=11.7^2\\\\r^2+100=136.89\ \ \ \ |subtract\ 100\ from\ both\ sides\\\\r^2=36.89\\\\r=\sqrt{36.89}\\\\r\approx6.1\\\\Answer:\boxed{C.\ r=6.1}$

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Set of multiples of 3 less than 15?

geniusboy [140]

Answer:

3,6,9,12,15

Step-by-step explanation:

5 0

2 years ago

PLEASE HELP OR IM gonna FAILLLLLLLL!!!!!!!!

podryga [215]

Answer:

Step-by-step explanation:

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3 years ago

If i have 35% of a phones and its now $78 how much was the phone before the discount

denpristay [2]

Step-by-step explanation:

Multiply $78 by by 65/100 to determine the original price.

78 can be put over 1.

<u>Multiply</u><u>:</u>

$\frac{78}{1} \times \frac{65}{100} = \frac{5070}{100}$

<u>Simplify by dividing the numerator and denominator by 100:</u>

$\frac{5070 \div 100}{100 \div 100} = \frac{50.70}{1}$

The original price was $50.70.

7 0

2 years ago

Consider a population list x, with a CV= 10%. A second population list, y, has a CV= 20%. The linear regression of y on x is y =

ch4aika [34]

Answer:

The correlation coefficient 0.5 depicts that there is moderate positive correlation between y and x.

Step-by-step explanation:

The linear regression equation is

y= a+bx

The given linear equation is

y= 10x

Here, slope=b=10 and intercept=a=0.

From above equation,

ybar=10xbar

We are given that CVx=0.1 and CVy=0.2

where CV=(standard deviation/mean)*100

We know that

b=r(Sy/Sx)

Multiplying by xbar/ybar on both sides

(xbar/ybar)b=r(Sy/Sx)(xbar/ybar)

(xbar/ybar)b=r[(Sy/ybar)/(Sx/xbar))]

(xbar/ybar)b=r[CVy/CVx]

As CVy/CVx=(Sy/ybar)*100/(Sx/xbar)*100=(Sy/ybar)/(Sx/xbar).

By putting ybar=10xbar, b=10, CVx=0.1 and CVy=0.2.

(xbar/10xbar)10=r(0.2/0.1)

1=r(0.2/0.1)

1=r(2)

r=0.5

There is moderate positive correlation between y and x.

6 0

3 years ago

Anybody know this ? Please help :(

Ad libitum [116K]

Answer:

Step-by-step explanation:

5.50. 5.50+0.25= 5.75, 5.75+0.25= 6.00, 6.00+0.25= 6.25, 6.25+0.25= 6.50

Option D is the answer:

5.50, 5.75, 6.00, 6.25, 6.50...

5 0

3 years ago