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2 years ago

I hope u can help me

Mathematics

2 answers:

loris [4]2 years ago

8 0

Answer:

it's 831.74

Step-by-step explanation:

enot [183]2 years ago

3 0

Answer:

A≈6163.05

Step-by-step explanation:

the formula is A=2πrh+2πr2

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Multiply. (7x-4)(4x-3)

dlinn [17]

Your answer is 28x^2-37x+12

1) Use the FOIL method: (a+b)(c+d)=ac+ad+bc+bd

28x^2-21x-16x+12

2) Collect like terms

28x^2+(-21-16x)+12

3) Simplify

28x^2-37x+12

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2 years ago

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miv72 [106K]

Answer:

52cm^2

Step-by-step explanation:

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Can somebody prove this mathmatical induction?

Flauer [41]

Answer:

See explanation

Step-by-step explanation:

1 step:

n=1, then

$\sum \limits_{j=1}^1 2^j=2^1=2\\ \\2(2^1-1)=2(2-1)=2\cdot 1=2$

So, for j=1 this statement is true

2 step:

Assume that for n=k the following statement is true

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3 step:

Check for n=k+1 whether the statement

$\sum \limits_{j=1}^{k+1}2^j=2(2^{k+1}-1)$

is true.

Start with the left side:

$\sum \limits _{j=1}^{k+1}2^j=\sum \limits _{j=1}^k2^j+2^{k+1}\ \ (\ast)$

According to the 2nd step,

$\sum \limits_{j=1}^k2^j=2(2^k-1)$

Substitute it into the $\ast$

$\sum \limits _{j=1}^{k+1}2^j=\sum \limits _{j=1}^k2^j+2^{k+1}=2(2^k-1)+2^{k+1}=2^{k+1}-2+2^{k+1}=2\cdot 2^{k+1}-2=2^{k+2}-2=2(2^{k+1}-1)$

So, you have proved the initial statement

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3 years ago

My common core lesson 7 3.1

Verizon [17]

What is the question?

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2 years ago

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Alona [7]

Answer:54?

Step-by-step explanation:

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2 years ago

I hope u can help me​

I hope u can help me