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olya-2409 [2.1K]
3 years ago
7

Evaluate the expression 15x + 4 for x = -1 1/2

Mathematics
1 answer:
Masja [62]3 years ago
4 0

Answer:

-149 /4

Step-by-step explanation:

x = -11/ 2

15x + 4

15 × -11/4 + 4

-165 / 4 +4

-165 / 4 + 4×4/4 ( taking lcm )

(-165 + 16 ) / 4

-149 /4

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Consider the following time series data. Week 1 2 3 4 5 6 Value 18 12 15 10 18 14 Using the naive method (most recent value) as
fenix001 [56]

Answer:

(a) MAE = 5.20

(b) MSE = 10

(c) MAPE = 38.60%

(d) Forecast for week 7 = 14

Step-by-step explanation:

Note: See the attached excel for the calculations of the Error, Error^2, and Error %.

(a) mean absolute error

MAE = Total of absolute value of error / Number of observations considered = |Error| / 5 = 26 / 5 = 5.20

(b) mean squared error

MSE = Total of Error^2 / Number of observations considered = Error^2 / 5 = 150 / 5 = 10

(c) mean absolute percentage error (Round your answer to two decimal places.)

MAPE = Total of Error % / Number of observations considered = Error % / 5 = 193.02 / 5 = 38.60%

(d) What is the forecast for week 7?

Since the forecast is based on the naive method (most recent value), the forecast for week 7 is value for week 6. Therefore, we have:

Forecast for week 7 = 14

Download xlsx
6 0
3 years ago
Julio believes that the quotient of 6 ÷ 1/2 = 3
Hitman42 [59]

Answer:

Julio did 6/2. The correct answer is 12.

Step-by-step explanation:

6/1/2=6*2=12. Julio forgot to change the division into multiplication. Dividing is multiplying by it's reciprocal.

5 0
2 years ago
Read 2 more answers
Question in the picture below
tekilochka [14]
The answer is C . cube 2
Explanation:
Using PEMDAS its Parentheses, exponents ,multiple then divide and add , subtract
8 0
2 years ago
Read 2 more answers
Factor the expression completely.<br> 15x2-5x - 10<br> 15x2-5x - 10 =
AVprozaik [17]

Answer:

x=8

Step-by-step explanation:

30-5x-10

-5x+30-10

-5x+40

-5x= -40

divide both sides by -5

-5x/-5= -40/-5

x=8

5 0
3 years ago
Please explain.
DENIUS [597]
If you want to solve this i suggest rather dividing or multiplying.
4 0
3 years ago
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