3 years ago

Maths help me maths giving 10 point

Mathematics

1 answer:

oksian1 [2.3K]3 years ago

7 0

I can’t see what you want

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If something is $380, then the sellers mark up the price by 84%, what is the final sale price??

nadya68 [22]

699.2 is correct answer

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3 years 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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3 years ago

What is right less a number is less than or equal to seventeen

USPshnik [31]

Answer:

x≤17

Step-by-step explanation:

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3 years ago

Ian picked up six teen red cars and 12 black cars from the floor of his room he put the same number of each color cars into two

Ad libitum [116K]

16 red cars and 12 black cars. He put half of each colour in each box. Therefore he would put 8 red and 6 black in each box. 8 red + 6 black is 14. Therefore he would have 14 cars in each box.

14.

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3 years ago

Read 2 more answers

Whats the equation 128 = p + 89 if p= 39

sergiy2304 [10]

128 = 128 cause u add them

8 0

2 years ago

Maths help me maths giving 10 point​

Maths help me maths giving 10 point