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3 years ago

Use the Formula d=r•t ( d= traveled is equal to the rate (r) of the speed times the time (t) it takes to travel that distance)

1 answer:

8 0

Ms. Handler drove at a rate of 75 km per hour. you do this by dividing the distance (225 km) by the time (3 hours) to get the average km traveled per hour

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a jar contains ten black buttons and six brown buttons. If nine buttons are picked at random, what is the probability that exact

Anuta_ua [19.1K]

Answer:

33.04% probability that exactly five of them are black

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes.

The order in which the buttons are chosen is not important. So we use the combinations formula to solve this question.

Combinations formula:

$C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

Desired outcomes:

Five black buttons, from a set of 10

Four brown buttons, from a set of 6.

$D = C_{10,5}*C_{6,4} = \frac{10!}{5!(10-5)!}*\frac{6!}{4!(6-4)!} = 3780$

Total outcomes:

Nine buttons, from a set of 16.

$T = C_{16,9} = \frac{16!}{9!(16-9)!} = 11440$

Probability:

$p = \frac{D}{T} = \frac{3780}{11440} = 0.3304$

33.04% probability that exactly five of them are black

6 0

3 years ago

A training field is formed by joining a rectangle and two semicircles, as shown below. The rectangle is 97m long and 66m wide. W

Ket [755]

Answer:

401.24m

Step-by-step explanation:

the length is,

97x2 + 66x3.14

3 0

3 years ago

Classify the scatter plot as having a negative or no correlation. HOMEWORK DUE TOMORROW

Katarina [22]

It's negative. If it had no correlation then they would be all over the place, with this you can see a steady decline.

3 0

3 years ago

Identify the variable and the constant in the expression below. n + 3 variable: ___________________________ constant: __________

Ilya [14]

N is the variable and 3 is the constant.

8 0

2 years ago

Please help me find g(10).

timama [110]

Answer:

Step-by-step explanation:

g(10) = (10^2-8)/(10+4)= (100 - 8)/14 = 92/14 = 48/7 or 6 6/7

7 0

3 years ago