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sasho [114]
4 years ago
12

If f(x) = x2 − 1, and f(2a) = 35, then what could be the value of a

Mathematics
1 answer:
Vesna [10]4 years ago
6 0
F(2a) = 4a^2 - 1 = 35

4a^2 = 36

a^2 = 9

a =  + or  - 3
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What is the total surface area of the cylinder?
a_sh-v [17]

Answer:

Option A = 113.04in^2

Step-by-step explanation:

Question: What is the total surface area of the cylinder? If the radius is 2in and height is 7in.

A) 113.04 in.2

B) 100.48 in.2

C) 131.88 in.2

D) 69.08 in.2

Solution:

Total surface area of a cylinder = 2πr^2 + 2πrh

r = radius = 2in

h = height = 7in

Let π = 3.14

Total surface area of the cylinder =

2×π×2^2 + 2×π×2×7

= 8π + π×28

= 8×3.14 + 3.14×28

Total surface area of the cylinder = 113.04in^2

=113.04in^2 (option A)

4 0
3 years ago
Read 2 more answers
Simplify: (4 /5 + 6/ 25 ) X (8/ 9 + −8 /7 )​
Westkost [7]

Answer: -416/1575

Step-by-step explanation:

\frac{4}{5}=\frac{20}{25} \implies \frac{4}{5}+\frac{6}{25}=\frac{26}{25}\\

\frac{8}{9}=\frac{56}{63}\\\\-\frac{8}{7}=-\frac{72}{63}\\\\\implies \frac{8}{9}-\frac{8}{7}=-\frac{16}{63}

\frac{26}{25} \times -\frac{16}{63}=-\frac{416}{1575}

6 0
2 years ago
John gets a new job and receives a $600 signing bonus. After that, he makes $250 a day. what is the slope and whats the y interc
anastassius [24]
Slope= 250
Y Intercept= 600
7 0
3 years ago
Read 2 more answers
You lose 2 points every time you forget to write your name on a test. You have forgotten to write your name 4 times. What intege
Gelneren [198K]

Answer:

-8

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how i got -8. both signs from -2 and 4 are different, and when they are different the answer will always be negative.

7 0
3 years ago
Please help me with the question please ASAP ASAP
yanalaym [24]
156

Especially since the shape is convex


5 0
3 years ago
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