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Harman [31]
2 years ago
7

What is the value of the expression when n=7

Mathematics
2 answers:
STALIN [3.7K]2 years ago
4 0
Can you tell us what the expression is in the question?
ozzi2 years ago
4 0
What is the equation in which n=7
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In triangle abc angle a = 40◦, side b = 11 and side c = 5. use the cosine rule to find the length of side a, to two decimal plac
Sonbull [250]
A^2 = b^2 + c^2 - 2bc cos a

    = 11^2 + 5^2 - 2*5*11 cos 40

   =  7.86 to 2 DP's

to find the remaining angles use the sine rule:-
a / sin A = b / sin B so

7.857/ sin 40 =  11 / sin B
sin B = 11 sin40 / 7.857 = 0.8999

<B = 64 degrees 

so <C = 180 - 64-40  =  76 degrees
5 0
2 years ago
Find the average rate of change of the function f(x)=(3/-3x-5), on the interval x ∈ [0,3]
Svet_ta [14]

Answer:

The average rate of change on the given interval is 9/70

Step-by-step explanation:

Here, we are to find the average rate of change of the function on the given interval

We proceed as follows;

on an interval [a,b] , we can find the average rate of change using the formula;

f(b) - f(a)/b-a

From the question;

a = 0

b = 3

f(0) = -3/5

f(3) = -3/14

Substituting the values, we have;

-3/14-(-3/5)/3-0

= 3/5-3/14/3

= (42-15)/70/3

= 27/70/3

= 27/70 * 1/3 = 9/70

4 0
2 years ago
Place parentheses in the expression 7^2+1-5x3 value is 135
SpyIntel [72]

Answer:

Step-by-step explanation:

[{((7^2)+1)-5}*3]

=[{(49+1)-5}*3]

=[{50-5}*3]

=[45*3]

=135

3 0
3 years ago
Coles has cut the price of Cadbury's chocolate bars by 20%. Their normal price is $3.45. A shareholder who has a Coles-Myer disc
pickupchik [31]
The first discounted price is given through the equation,
                              discounted price = ($3.45)(1 - 0.20) = $2.76
Then, due to the privilege of being a Coles-Myer discount card holder, another 7.5% discount is given. Such that the final price would be,
                              final price = ($2.76)(1 - 0.075) = $2.553
The total amount saved up is equal to,
                                    $3.45 - $2.553 = $0.897
5 0
3 years ago
What expression is equal to 6×8?<br> A. 8×6<br><br> B. 14×1<br><br> C. 6×4×8<br><br> D. 4+2×7+1
iogann1982 [59]
Well, you need to see which is equal to 6*8
6*8 = 48

14*1 = 14
6*4*8 = 192
(4+2)*(7+1) = 48
6 0
3 years ago
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