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Airida [17]
3 years ago
9

F(n) =7n -11 f(1) f(2)

Mathematics
1 answer:
UkoKoshka [18]3 years ago
5 0

Answer:

- 4 and 3

Step-by-step explanation:

Given

f(n) = 7n - 11

To evaluate f(1) and f(2) substitute n = 1 and n = 2 into f(n), that is

f(1) = 7(1) - 11 = 7 - 11 = - 4

f(2) = 7(2) - 11 = 14 - 11 = 3

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What number completes both equations 1/4 divided 9 =? ? Times 9= 1/4
Dmitry_Shevchenko [17]
4·9 = 9x = 1/4
(36 = 9x = 1/4) ·4
144 = 36x
144/36 = x
x = 4
6 0
3 years ago
The expression 2(l + w) is used to calculate the perimeter of a rectangle, where l is length and w is width. If the length is Fr
Art [367]

Answer:

Perimeter = 1 unit

Step-by-step explanation:

length \ is \ a \ fraction \ 2  \ over \ 3 = \frac{2}{3}\\\\Width \ is \ a \ fraction \ 1 \ over \ 3 = \frac{1}{3}\\\\Perimeter = 2 ( l + w)\\

               = 2 \times (\frac{2}{3} + \frac{1}{3}) \\\\=2 \times (\frac{3}{3})\\\\= 1 unit

5 0
3 years ago
CAN SO ONE PLS HELP ME whats (2-3x4)9+22
Nuetrik [128]

Answer:

The answer is =  112

Step-by-step explanation:

3x4 = 12

12 - 2 = 10

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90 + 22 = 112

4 0
3 years ago
PRACTICE ANOTHER A piece of wire 18 m long is cut into two pieces. One piece is bent into a square and the other is bent into an
sergejj [24]

Answer:

Step-by-step explanation:

We have the equations

4x + 3y = 18   where x = the side of the square and y = the side of the triangle

For the areas:

A = x^2 + √3y/2* y/2

A = x^2  + √3y^2/4

From the first equation x = (18 - 3y)/4

So substituting in the area equation:

A = [ (18 - 3y)/4]^2 + √3y^2/4

A = (18 - 3y)^2 / 16 + √3y^2/4

Now for maximum / minimum area the derivative = 0 so we have

A' = 1/16 * 2(18 - 3y) * -3 + 1/4 * 2√3 y = 0

-3/8 (18 - 3y) + √3 y /2 = 0

-27/4 + 9y/8 + √3y /2 = 0

-54 + 9y + 4√3y = 0

y = 54 / 15.93

= 3.39 metres

So x = (18-3(3.39) / 4 = 1.96.

This is a minimum value for x.

So the total length of wire the square  for minimum  total area is 4 * 1.96

= 7.84 m

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3 0
3 years ago
Guys help me with this question.
Vladimir79 [104]
100/-24 = -4 :)))))))
8 0
3 years ago
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