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Juliette [100K]
2 years ago
8

The derivative of a function f(x)=2-7sinx is--------

Mathematics
1 answer:
Setler [38]2 years ago
7 0

Answer: -7cos(x)

Step-by-step explanation:

d/dx (f(x))= -7cos(x)

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Of the 8 students in the chess club, three will represent the club at an upcoming competition. How many different 3-person teams
xz_007 [3.2K]
I think that this is a combination problem. From the given, the 8 students are taken 3 at a time. This can be solved through using the formula of combination which is C(n,r) = n!/(n-r)!r!. In this case, n is 8 while r is 3. Hence, upon substitution of the values, we have

C(8,3) = 8!/(8-3)!3!
C(8,3) = 56

There are 56 3-person teams that can be formed from the 8 students. 
6 0
3 years ago
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Please help me with these two questions, 10 points for each so in total 20!!
saul85 [17]

Answer:

\large\boxed{Q2.\qquad C.\ -2x+y=-2}\\\boxed{Q4.\qquad C.\ y=3x+12}

Step-by-step explanation:

Q2:

The point-slope form of an equation of a line:

y-y_1=m(x-x_1)

m - slope

The formula of a slope:

m=\dfrac{y_2-y_1}{x_2-x_1}

We have the points (4, 6) and (6, 10). Substitute:

m=\dfrac{10-6}{6-4}=\dfrac{4}{2}=2

y-6=2(x-4)           <em>use distributive property</em>

y-6=2x-8      <em>add 6 to both sides</em>

y=2x-2          <em>subteact 2 from both sides</em>

-2x+y=-2

Q4:

The slope-intercept form of an equation of a line:

y=mx+b

m - slope

b - y-intercept

Put the slope m = 3 and the coordinateso f the point (-2, 6) to the point-slope form of an equation of a line:

y-6=3(x-(-2))

y-6=3(x+2)         <em>use distributive property</em>

y-6=3x+6     <em>add 6 to both sides</em>

y=3x+12

4 0
2 years ago
I need this answered soon!! please help!! 20 points and brainliest!!!
emmasim [6.3K]

Answer:

graph 1

Step-by-step explanation:

if it's all the times BETTER

then it shouldn't include 15

8 0
3 years ago
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I need the answers and it's due today, please help
Novay_Z [31]

Answer:

1. 3

2. 1

3. 2

4. 4

5. 5

Step-by-step explanation:

3 0
2 years ago
Hours<br>7 2/3<br>1 2/5<br>4 3/4<br>8 4/5​
VLD [36.1K]
1. 7 hours and 40 min
2. 1 hour and 24 min
3. 4 hours and 45 min
4. 8 hours and 48 min
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