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boyakko [2]
3 years ago
8

The number $f$ of miles a ship is from its destination $x$ hours after starting a voyage is given by $f\left(x\right)=420-30x.$

The number $f$ of miles a submarine is from its destination $x$ hours after leaving port is shown in the graph below. State the distance and length of time of each voyage.
Mathematics
1 answer:
k0ka [10]3 years ago
7 0
Your answer should be 12.56
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Frank cut a 52 inch string into 3 pieces. The first piece is 20 inches long. The second piece is at least 12 inches long, but no
Eddi Din [679]
We need to figure out how much string would be left, after taking away the first two pieces.
We know that the first piece is 20 inches long, so we can say that there is 52-20 inches left, or 32 inches.

The second piece is between 12 and 18 inches, meaning that there would be between 32-12 and 32-18 inches left for the third piece, or 20 and 14 inches. This means that the third piece would be at least 14 inches long, but no more than 20, since we don’t have more string than that (20+12+20=52, and 20+14+18=52)

So we can say that x is greater or equal to 14, but less than or equal to 20, or:

14<=x<=20 (“<=“ is written like a normal “<“ sign with a line _ right under it)
4 0
3 years ago
Reagan will use a random number generator 1,200 times. Each result will be a digit from 1 to 6. Which statement best predicts ho
Stolb23 [73]

The answer is B.

The only reason it will be 200 is because the numbers 1,2,3,4,5,and 6 are all an option so the probability of 5 is 1/6 and if you multiply 1/6 by 1,200 you will get 200. Hope this helped!

5 0
3 years ago
Please help me with these two.
Bad White [126]

Just 9

I'm not sure for the second one but I think 1 ft

3 0
3 years ago
If CF = 5, CD = 12, and EF = 5, what is the perimeter of triangle CDE?
Basile [38]

Answer:

The perimeter of triangle CDE is 34.

Step-by-step explanation:

To find the perimeter of a triangle, you have to add all the sides together, since this looks like a isosceles triangle, you would make side ED also 12 and then just add them all together.

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8 0
3 years ago
Write ln 2x + 2x ln x -ln 3y as a single logarithm.
andreev551 [17]

Answer: option c.

Step-by-step explanation:

 To solve this problem you must keep on mind the properties of logarithms:

ln(b)-ln(a)=ln(\frac{b}{a})\\\\ln(b)+ln(a)=ln(ba)\\\\a*ln(b)=ln(b)^a

Therefore, knowing the properties, you can write the expression gven in the problem as shown below:

ln2x+2lnx-ln3y=ln2x+lnx^2-ln3y\\\\=ln(2x)(x^2)-ln3y\\\\=ln(\frac{2x^3}{3y})

Therefore, the answer is the option c.

7 0
3 years ago
Read 2 more answers
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