In a class of 25 students, 17 have a brother and 12 have a sister. There are 10 students who have a brother and a sister. What is the probability that a student chosen randomly from the class has a brother?

Answer:

the answer is 3

Step-by-step explanation:

Answer:

5.678 liters in 1.5 gallons and 4.542 for 1.2 gallons in liters

Answer:

[tex]m(\widehat{WXZ})[/tex] = 160°

Step-by-step explanation:

By angle sum postulate,

m∠WYX + m∠XYZ = m∠WYZ

m∠WYZ = 50° + 30°

              = 80°

Since, inscribes angle (∠WYZ) = [tex]\frac{1}{2}\times (\text{Intercepted arc WXZ})[/tex]

80° = [tex]\frac{1}{2}(\widehat{WXZ})[/tex]

[tex]m(\widehat{WXZ})[/tex] = 160°

Answer:

ypotenuse squared = adjacent squared + opposite squared

Step-by-step explanation:

sin θ =opposite/hypotenuse

tan θ = opp/adjacent

cos θ = adj/hyp

Pythagoras Theorem states that hypotenuse squared = adjacent squared + opposite squared

Answer:

2100

Step-by-step explanation:

5% of 2000 = 2000 x 1/20 = 100.

2000+100=2100

Also, if it said how much interest will her investment PAY, then it would be $100 because of the 5% simple interest.

Answer:

x should equal three

Step-by-step explanation:

5(x + 1) - 8 = 5x(2 - 4)

5x+1-8=5x-4

5x-7=5x-4

+7 +7

5x= 5x +3

÷ 5 ÷5

×=3

Answer:

47/24

Step-by-step explanation:

24x1 = 24

24+23 = 47

47/24

Answer:

47/24

Step-by-step explanation:

just add 24 to the 23 and you'll get your answer.

Answer: 12.1 years

Step-by-step explanation:

youd find 2.2% of 3000 which is 66 and then divide 800 by 66 to see how many years it would take to make 800 interest and you get 12.1 years. 90% sure on that answer btw

Answer:

A number that can be written as the ratio of two integers .

Step-by-step explanation:

Irrational numbers are numbers those numbers that have infinite non-periodic decimals, that are reproduced in an unlimited way without an end point, without any part of the sequence being repeated. The set of irrational numbers, added to the rational numbers, configures the category of real numbers.

Irrational numbers include, for example, the famous number Phi (π), whose approximate value is 3.14 ..., extending its decimals indefinitely. These numbers are most often used in mathematical analysis.

Answer:

a number that can be written as the ration of two integers

Step-by-step explanation:

i’m doing the i-ready

Answer:

1500%

Step-by-step explanation:

The formula for Percentage increase is

Increase/ Initial Amount × 100

Increase = Current Amount - Initial Amount

Increase = $320,000 - $20,000

Increase = $300,000

Percentage Increase =

$300,000/$20,000 × 100

= 1500%

The percent increase in home value in those 50 years is 1500%

Answer:

im not completely sure but I'd say 30

Step-by-step explanation:

well I'm not sure but if they have the same base and altitude you'd think they might have the same volume, but I'm not exactly sure

Answer:

B

Step-by-step explanation:

Because at least means not less than 50 or equal to 50

Since he wrote 18 pages then you have to add.

Answer:

I was wondering the same thing. maybe it is specific for certain people.

Step-by-step explanation:

Answer:

i think you have to be a certain rank

Step-by-step explanation:

Answer: x = 3.6 Thats the answer.

[tex]\frac{2}{3}x+5=21\\\frac{2}{3}x=16\\x=16/2/3\\x=16*3/2\\24[/tex]

Answer:90

Step-by-step explanation:

Answer:

5

Step-by-step explanation:

Answer:

1/2w = 10 (you have to divide both sides by 1/2 to isolate w)

w= 5 (your answer)

I hope this helped :)

Answer:

9.046 * 10^7

Step-by-step explanation:

90460000

We need one non-zero digit to the left of the decimal

9.0460000

We moved the decimal 7 places to the left so the exponent is 7

9.046 * 10^7

Answer:

9.046 × 10^7

Step-by-step explanation:

Move the decimal 7 times to the left. You come up with 9.046

Hope this helps :)

Answer:

B) [tex]\displaystyle \frac{1}{16}[/tex]

Step-by-step explanation:

[tex]\displaystyle \frac{1}{16} = \frac{\frac{1}{8}}{2} \\ \\ OR \\ \\ \frac{1}{8} \div 2 = \frac{1}{8} \times \frac{1}{2} = \frac{1}{16}[/tex]

I am joyous to assist you at any time.

Answer:

309.12

Step-by-step explanation:

A = total amount

P = principal

r = interest rate

n = number of times interest is compounded

t = time (in years

A = P(1 + [tex]\frac{r}{n}[/tex])^nt

A = 300(1 + [tex]\frac{.03}{12}[/tex])^12 · 1

A = 300(1.0304)

A = 309.12

Answer:

408

Step-by-step explanation:

Answer:

B

Step-by-step explanation:

Just test two coordinates. Just do y2-y1/x2-x1. 60-80/20-10 = -20/10 = -2

Answer:

e. -490

Step-by-step explanation:

-318+3= -315

-315/9= -35

So that would mean m= -35

-35*14= -490

Answer: -4

Step-by-step explanation:

Answer:

y = 2x-4

all the equations are the same as the slope-intercept form is the same for all the equations

Step-by-step explanation:

slope-intercept form:

[tex]y = mx + b[/tex]

2x-3 = y+1

-y+2x-3 = 1

-y = 1-2x+3

-y = (1+3)-2x

-y = 4-2x

y = -4+2x

( commutative property: the number on which we operate can be moved or swapped from their position without making any difference to the answers )

y = 2x-4

Answer:

7.5

Step-by-step explanation:

divide 15 and 50

Answer:

C)   [tex] -1\frac{5}{8}x + 3 [/tex]

Step-by-step explanation:

[tex] \frac{1}{2}(\frac{3}{4}x + 10) - 2(x + 1) = [/tex]

[tex] = \frac{3}{8}x + 5 - 2x -2 [/tex]

[tex] = \frac{3}{8}x + 5 - \frac{16}{8}x - 2 [/tex]

[tex] = -\frac{13}{8}x + 3 [/tex]

[tex] = -1\frac{5}{8}x + 3 [/tex]

Answer: C)   [tex] -1\frac{5}{8}x + 3 [/tex]