Find the slope of the line C(3,4) D(4,6)

Mathematics

1 answer:

goblinko [34]3 years ago

8 0

6-4=2
4-3=1
Therefor, the slope is 2/1. Or, 2.

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#2. A field of grass feeds 36 cows for 4 days. How<br> many days would the same field feed 20 cows?

Oksi-84 [34.3K]

162 cow-days

Since the initial grass and the grass accumulated over 4 days is equal to 144 cow-days, the initial grass is equal to (144 − 36) or 108 cow-days. Now, to find the answer to the question: in 18 days, the grass accumulation is equal to 18 ∗ 9 or 162 cow-days.

Please consider marking brainliest! :)

6 0

3 years ago

I need help with 2. how do I prove?

Agata [3.3K]

First off, your handwriting needs a bit of help. Do you expect people to read that?

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3 years ago

Using the expansion for the binomial: ( x^3 − y^4 )^9 :The coefficient for the 6th term is

Lelechka [254]

Answer:

-126

Step-by-step explanation:

For the binomial expression $(a-b)^{n}$ the coefficient of $(r+1)^{th}$ term is given by ${n \choose r} \times -1^{(r)}$ .

We have to find the coefficient of 6th term in the binomial expansion of

$(x^{3}-y^{4})^{9}$ .

Hence n=9 and r=5

The coefficient of 6th term = ${9 \choose 5} \times (-1)^{5}$

= $-{9 \choose 5}$

= -126

8 0

3 years ago

BRAINLIEST ASAP! PLEASE HELP ME :)

aleksandrvk [35]

Answer:

Two

Step-by-step explanation:

The table is saying that, if Sandra swam enough races, she should expect to get 20 firsts, 12 seconds, 6 thirds, and two no placements.

Her expected value of points will be the average (mean) of all the points awarded for each race.

The average is the total number of points divided by the number of races.

$\begin{array}{cccl}\textbf{Points} & & \textbf{Total}\\\textbf{Awarded} & \textbf{Frequency} & \textbf{Points}\\3 & 20 & 60\\2 & 12 & 24\\1 & 6 & 6\\0 & 2 & 0\\\textbf{TOTAL} & \mathbf{40} & \mathbf{90}\\\end{array}$