3 years ago

There are 300 students in a twelfth grade high school class. 120 of these students have at least one sister and

Mathematics

1 answer:

sukhopar [10]3 years ago

6 0

Answer:

2/5

1/3

2/15

2/5

YES P(A/B) = P(A)

YES A and B are independent events.

Step-by-step explanation:

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A) 1 b) -20 c) 20 d) 7

Ipatiy [6.2K]

$f(x)=x^2;\ g(x)=x-3\\\\(g\ \circ\ f)(x)=(x^2)-4=x^2-3\\\\\text{Put x = -2 to the equation}\\\\(g\ \circ\ f)(-2)=(-2)^2-3=4-3=1\to\boxed{a)}$

3 0

3 years ago

Section J in an arena has 20 rows each row has 15 seats all tickets cost $18 each if all the seats are sold, how much money will

quester [9]

If there are 20 rows each and 15 per row then you would multiply 20(15) = 300 then so there are 300 seats in Section J. each seat is 18$ so you would multiply 300(18) = 5400 so section J would get 5,400$ if it were to be sold out. The equation is 20(15)=300(18)=5400

5 0

3 years ago

How to find the power of area of a square 3.5² i know the answer is 12.25 but i want the formula of 3.5²

LiRa [457]

Answer:

$3.5^{2}$ = 3.5 * 3.5 = 12

square means: multiply the number by itself two times. so 3.5 * 3.5

cube ( $3.5^{3}$ ) means: multiply the number by itself three times. so 3.5 * 3.5 * 3.5

i hope u understand :)

3 0

3 years ago

The difference of 4 minus 17 less the sum of 6 and 1

steposvetlana [31]

Answer:

4-(-10)

Step-by-step explanation:

17 less than 6+1 is negative 10 so 4 minus negative 10

5 0

3 years ago

Only number one please help

Alex73 [517]

Answer:

C) 75 + 50x = 25 + 70x

Step-by-step explanation:

ABC Tech:

$50 an hour. So,for x hours= 50 * x = 50x

Service charge = 75 + 50x

Tech Squad:

$70 an hour. So,for x hours= 70 * x = 70x

Service charge = 25 + 70x

C) 75 + 50x = 25 + 70x

50x - 70x = 25 - 75

-20x = -50

x = -50/-20

x =5/2 = 2 $\frac{1}{2}$ hours

6 0

3 years ago