3 years ago

How many minutes are in nine and one fourth hours?

Mathematics

2 answers:

snow_lady [41]3 years ago

8 0

Answer:

555 9x60=540

540+15=555 there is your answer

remember that 1/4 of an hour is fifteen minutes

pls mark brainliest

Step-by-step explanation:

saveliy_v [14]3 years ago

3 0

Answer:

555 minutes

Hope this helps!

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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.

4 0

3 years ago

HELP ASAP!! What is the average rate of change between x = -3 and x = 4 for the equation y = 8x2?

Llana [10]

Answer:

$x=-3\\y=8(-3)^2\\y=8(9)\\y=72$

$x=4\\y=8(4)^2\\y=8(16)\\y=128$

128-72=56

average rate of change is 56

Step-by-step explanation:

Plz let me know if im right

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2 years ago

John plans to practice piano at least 2 1 2 212 hours this weekend. If he practices 1 1 6 116 hours on Saturday and 1 1 4 114 ho

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2 years ago

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podryga [215]

The answer is the last one, y = 2/3 -2
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2 years ago

The expression [(-7) ³ - (-7³)] - [(-7) ² + 7²] results in

Reil [10]

[(-7)(-7)(-7) + (-7)(-7)(-7)] - [(-7)(-7) + (7)(7)]
(-343 + -343) - (49 + 49)
-686 - 98 = -784
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4 0

3 years ago

Read 2 more answers