2 years ago

Help these problems lol alll of them

Mathematics

1 answer:

Ratling [72]2 years ago

7 0

Answer:

1) 18

2) Tuesday, Thursday, Saturday

3) Weeks 2 and 4

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Tim installs 50 square feet of his floor in 45 minutes. At this rate, how long does it take him to install 495 square feet?

77julia77 [94]

Answer:

99.5 minutes

Step-by-step explanation:

50=45

495=?

495×45÷50=99.5

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2 years ago

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Westkost [7]

Answer:

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2 years ago

2 Select the correct answer. Consider functions f and g. Which statement gives the best approximation of the solutions of the eq

kaheart [24]

Answer: are c and d

Step-by-step explanation: I think not sure.

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1 year ago

Prove that an = 4^n + 2(-1)^nis the solution to

olga nikolaevna [1]

Answer:

See proof below

Step-by-step explanation:

We have to verify that if we substitute $a_n=4^n+2(-1)^n$ in the equation $a_n=3a_{n-1}+4a_{n-2}$ the equality is true.

Let's substitute first in the right hand side:

$3a_{n-1}+4a_{n-2}=3(4^{n-1}+2(-1)^{n-1})+4(4^{n-2}+2(-1)^{n-2})$

Now we use the distributive laws. Also, note that $(-1)^{n-1}=\frac{1}{-1}(-1)^n=(-1)(-1)^{n}$ (this also works when the power is n-2).

$=3(4^{n-1})+6(-1)^{n-1}+4(4^{n-2})+8(-1)^{n-2}$

$=3(4^{n-1})+(-1)(6)(-1)^{n}+4^{n-1}+(-1)^2(8)(-1)^{n}$

$=4(4^{n-1})-6(-1)^{n}+8(-1)^{n}=4^n+2(-1)^n=a_n$

then the sequence solves the recurrence relation.

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2 years ago

Find a coterminal angle to -180 degrees.

maw [93]

Answer:

540 degrees

Step-by-step explanation:

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2 years ago