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3 years ago

5

the high temperature one day was -1°f. The low temperature was-5°f. What was the difference between the high and low temperature

s for the day

1 answer:

Kazeer [188]3 years ago

3 0

The answer is 4.

Hope this helps you!

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What is the value of X?<br><br> Please help! I suck at math but need to pass

Rama09 [41]

Answer:

2

Step-by-step explanation:

Because To get a single x you would have to divide 5x by 5. Whatever you do to one side you have to do to the other so you would do 5 x/5 and get 10/5 and then x=10/5 and 10/5 equals 2 so...x=2 , Hope this helped!

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2 years ago

I NEED HELP ASAP! Mabye.

melamori03 [73]

Answer:

b and e

Step-by-step explanation:

6 0

3 years ago

Which step is wrong, Step 1, Step 2, Step 3 or Li didn't make a mistake

mart [117]

Hello there!

The correct answer is option A

Instead of the division sign, it suppose to be multiply.

Have fun on Khan Academy!

7 0

2 years ago

Plz help duke for 10 points

BaLLatris [955]

Answer

A) 2(4+5)

2(9)

18

B) 2(10+2)

2(12)

24

C) 4*5

20

D) 10*2

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7 0

3 years ago

Solve the following recurrence relation: <br> <img src="https://tex.z-dn.net/?f=A_%7Bn%7D%3Da_%7Bn-1%7D%2Bn%3B%20a_%7B1%7D%20%3D

-Dominant- [34]

By iteratively substituting, we have

$a_n = a_{n-1} + n$

$a_{n-1} = a_{n-2} + (n - 1) \implies a_n = a_{n-2} + n + (n - 1)$

$a_{n-2} = a_{n-3} + (n - 2) \implies a_n = a_{n-3} + n + (n - 1) + (n - 2)$

and the pattern continues down to the first term $a_1=0$ ,

$a_n = a_{n - (n - 1)} + n + (n - 1) + (n - 2) + \cdots + (n - (n - 2))$

$\implies a_n = a_1 + \displaystyle \sum_{k=0}^{n-2} (n - k)$

$\implies a_n = \displaystyle n \sum_{k=0}^{n-2} 1 - \sum_{k=0}^{n-2} k$

Recall the formulas

$\displaystyle \sum_{n=1}^N 1 = N$

$\displaystyle \sum_{n=1}^N n = \frac{N(N+1)}2$

It follows that

$a_n = n (n - 2) - \dfrac{(n-2)(n-1)}2$

$\implies a_n = \dfrac12 n^2 + \dfrac12 n - 1$

$\implies \boxed{a_n = \dfrac{(n+2)(n-1)}2}$

4 0

2 years ago