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2 years ago

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a bookcase contains 2 statistics books and 4 biology books. if 2 books are chosen at random,the chance that both are statistics

books is

1 answer:

azamat2 years ago

5 0

Do you want a ratio? If so 1:2

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If q is inversely proportional to r squared and q=30 when r=3, find r when q=1.2

beks73 [17]

Answer:

r = 3

Step-by-step explanation:

q = k / $r^{2}$

k = q $r^{2}$ = 1.2 x 3 x 3 = 10.8

q = 10.8/ $r^{2}$

1.2 = 10.8/ $r^{2}$

r = $\sqrt{10.8 /1.2}$ = 3

4 0

1 year ago

A school baseball team raised $810 for new uniforms. Each player on the team sold one book of tickets. There were 10 tickets and

Lena [83]

Answer:

270 tickets were sold
not needed: books per player, tickets per book

Step-by-step explanation:

To find the number of tickets sold, the total revenue needs to be divided by the revenue per ticket:

(total revenue)/(revenue/ticket) = total tickets

$810/$3 = 270 . . . total tickets

__

None of the other numbers in the problem are needed: books per player (1), tickets per book (10).

3 0

1 year ago

Simplify 100y^3/98xy pls answer soon hegarty maths lazy

OleMash [197]

Answer:

50y^4x/49

Step-by-step explanation:

y^3/98

((100* y^3/98 * x) * y

2.1 y^3 * y^1=y^(3+1)=y^4

8 0

1 year ago

Which graph represents a function with direct variation? A coordinate plane with a line passing through (negative 4, 0) and (0,

lesya692 [45]

Answer:

A line passing through the points (-1,-4),(0,0) and (1,4)

Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $y/x=k$ or $y=kx$

In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin

<u><em>Verify each case</em></u>

Part 1) A line passing through the points (-4,0) and (0,-2)

This line not represent a direct variation, because the line not passes through the origin.

Part 2) A line passing through the points (-5,4) and (0,3)

This line not represent a direct variation, because the line not passes through the origin.

Part 3) A line passing through the points (-4,-6) and (0,3)

This line not represent a direct variation, because the line not passes through the origin.

Part 4) A line passing through the points (-1,-4),(0,0) and (1,4)

The line passes through the origin

Find out the value of k

$k=y/x$

For the point (-1,-4)

substitute

$k=-4/-1$

$k=4$

For the point (1,4)

substitute

$k=4/1$

$k=4$

The linear equation is

$y=4x$

This line represent a direct variation

6 0

2 years ago

Read 2 more answers

Question Number 12 You are a landscaper working on the design of a parking lot in a new shopping center. You are measuring the l

vovikov84 [41]

Answer:

$Length\: of\: D=37\frac{3}{16} \:feet$

Step-by-step explanation:

The following are the given information:

The handicapped spot, which is $10\frac{1}{16}$ feet wide and next to the curb.
The other three spots are $8\frac{3}{8}$ feet wide.
There are 4 dividing lines between the spots, and each measures $\frac{1}{2}$ foot.

The Median D therefore will be a sum of the following:

The width of the Handicapped Spot
3 X The width of the other spots
4 X The width of the dividing line

$= 10\frac{1}{16} + (3 X 8\frac{3}{8})+(4 X\frac{1}{2})\\=\frac{161}{16} + \frac{3 X 67}{8}+\frac{4}{2}\\=\frac{161}{16} + \frac{201}{8}+\frac{4}{2}\\=\frac{161+402+32}{16}\\=\frac{595}{16}\\Length\: of\: D=37\frac{3}{16} \:feet$

7 0

2 years ago