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coldgirl [10]
3 years ago
7

What angles share the same cosine value as cos 45° and has terminal sides in what quadrant?

Mathematics
1 answer:
Kazeer [188]3 years ago
8 0
315° shares the same cosine
hope this helps!

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Find the slope for the following pair of points:<br> (12,-16) and (3,0)
nadezda [96]

Answer:

16/9

Step-by-step explanation:

We can find the slope given two points by using the following formula

m = (y2-y1)/(x2-x1)

    = (0--16)/(3-12)

     = (0+16)/(3-12)

     =16/9

5 0
3 years ago
Read 2 more answers
Please solve this question faaaast​
Kazeer [188]

Answer:

300-400

Step-by-step explanation:

The first step is finding the total of the data we have. So, we take 5 + 10 + 15 + 20 + 25 + 15 + 10 which equals 80.

The median is the middle point of all the data. If it's an odd number, you can calculate the median with the equation (n+1) / 2, plugging in the total amount of data for n.

When it's an even number though, there is no one middle point since the data splits evenly in 2, so we have to use 2 equations: n/2 & (n/2) + 1. Then, we find the average of those two data points. (Although, you don't have to do that for this particular question).

When we plug 80 in for n in both of these equations, we get 40 and 41.

To where this is in the question, we have to count up from the bottom of the chart. 1-5 is below 100, 6-15 is 100-200, 16-30 is 200-300, and 31-50 is 300-400.

Since 40 and 41 are between 31 and 50, the answer is 300-400.

Hope this helps! :)

6 0
2 years ago
A snowmobile traveled 32 miles in 2 1/3 hours.
laila [671]

Answer:

13.7 mph

Step-by-step explanation:

• d = st

Given:

  • d = 32 miles
  • t = 2 1/3 hr = 7/3 hr

Find the rate s:

  • s = d/t
  • s = 32-7/3 = 32 x 3/7 = 96/7 = 13.7 mph (rounded)
5 0
3 years ago
What is the percentage of "85% of 78.00?" (Also needs calculation)
Tatiana [17]

-21.85.999

I found the ansewr by dividing both of  the numbers to equal tthat

6 0
3 years ago
Show that the sum of two concave functions is concave. Is the product of two concave functions also concave?
spayn [35]

Answer with explanation:

Let us assume that the 2 functions are:

1) f(x)

2) g(x)

Now by definition of concave function we have the first derivative of the function should be strictly decreasing thus for the above 2 function we conclude that

\frac{d}{dx}\cdot f(x)

Now the sum of the 2 functions is shown below

y=f(x)+g(x)

Diffrentiating both sides with respect to 'x' we get

\frac{dy}{dx}=\frac{d}{dx}\cdot f(x)+\frac{d}{dx}\cdot g(x)\\\\

Since each term in the right of the above equation is negative thus we conclude that their sum is also negative thus

\frac{dy}{dx}

Thus the sum of the 2 functions is also a concave function.

Part 2)

The product of the 2 functions is shown below

h=f(x)\cdot g(x)

Diffrentiating both sides with respect to 'x' we get

h'=\frac{d}{dx}\cdot (f(x)\cdot g(x))\\\\h'=g(x)f'(x)+f(x)g'(x)

Now we can see the sign of the terms on the right hand side depend on the signs of the function's themselves hence we remain inconclusive about the sign of the product as a whole. Thus the product can be concave or convex.

8 0
3 years ago
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