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Darina [25.2K]
3 years ago
7

Find the surface area

Mathematics
1 answer:
Rom4ik [11]3 years ago
3 0

Answer: The surface area is 645.9 ft^2.

Step-by-step explanation:

12.1 * 9 =  229.9 /2 =  114.95

12.1 * 9 = 229.9/2 =  114.95

5 * 8 = 40

8* 14 = 112

8 * 14 = 112

8 * 19 = 152

114.95  +   114.95  +  40 +112  + 112  + 152 = 645.9

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Someone please help me on both the questions!!!
bonufazy [111]

Step-by-step explanation:

al nth term:

numerator:

=  {n}^{2}

denominator:

= n + 1

so nth term :

=  \frac{ {n}^{2} }{n + 1}

b). 1; 11; 27; 49

first difference: 10; 16; 22

second difference :6

formula for 1st difference:3a+b

formula for 2nd difference:2a

Therefore:

2a=6

a=3

3a+b=10

sub in a

3(3)+b=10

9+b=10

b=1

sub into quadratic formula

{an}^{2}  + bn  + c

(3) {(1)}^{2}  + (1)(1) + c = 1

3(1) + 1 + c = 1

3 + 1 + c = 1

4 + c = 1

c  = - 3

So Tn:

3 {n }^{2}  +  1n - 3

7 0
2 years ago
Read 2 more answers
A function is shown f(x)=2/3x+3 what is the value of f(12)
exis [7]

Answer:

55/18

Step-by-step explanation:

f(x) = 2/3*12 +3

= 1/18 +3

=55/18

7 0
3 years ago
What is the slope of the line that passes through (4, 12) and (5, 16)?
Alex
The slope is 4/1 aka 4!
4 0
2 years ago
Read 2 more answers
What is 9-(-5) please help me​
elena-14-01-66 [18.8K]

9-(-5)=

9 + 5 (because - - = +)

14

thus 9-(-5) = 14

4 0
3 years ago
Need help on the last problem please.
pshichka [43]

Answer:

6 of x and 5 of y

Step-by-step explanation:

x = number of closets of the first type

y = number of closets of the second type

1200 = 100x + 120y

100 = 10x + 8y

10x = 100 - 8y

10x(100 - 8y) + 120y = 1200

1000 - 80y + 120y = 1200

40y = 200

y = 5

100 = 10x + 8×5 = 10x + 40

60 = 10x

x = 6

20x + 24y = max

20×6 + 24×5 = 120 + 120 = 240

6 0
3 years ago
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