Pls help!!!!! i’m on a timer i’ll mark you brainliest!!!

Answers

Answer 1

Answer:

Answer:

-3.9

Step-by-step explanation:

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Suppose you have saved m dollars for the party. Since you have been doing a lot of chores, your father decides to give you double the amount you have saved. You spend s dollars to throw the party. Which expression represents the amount of money you have left?

Answers

Answer:

m+2m-s

Step-by-step explanation:

Answer:

A: M + 2m - s

Step-by-step explanation:

Find all possible values for A, B and C+ABA
BAB
-----------
CCC
Each letter represents a single digit from 9 to 0

Answers

The sum of A and B can have no carry. If we assume A ≠ B ≠ C, then you can have ...

... (A, B, C) ∈ {(1, 2, 3), (2, 1, 3), (1, 3, 4), (3, 1, 4), (1, 4, 5), (4, 1, 5), (1, 5, 6), (5, 1, 6), (1, 6, 7), (6, 1, 7), (1, 7, 8), (7, 1, 8), (1, 8, 9), (8, 1, 9), (2, 3, 5), (3, 2, 5), (2, 4, 6), (4, 2, 6), (2, 5, 7), (5, 2, 7), (2, 6, 8), (6, 2, 8), (2, 7, 9), (7, 2, 9), (3, 4, 7), (4, 3, 7), (3, 5, 8), (5, 3, 8), (3, 6, 9), (6, 3, 9), (4, 5, 9), (5, 4, 9)}

7n+4n combine the like terms to create an equivalent expression

Answers

Answer:

11n

Step-by-step explanation:

7n+4n (factorize out n)

= n (7 + 4)

= n (11)

= 11n

Answer:

11n

Step-by-step explanation:

Combining like terms just means adding together the numbers with the same variable. 7n and 4n both have an n attached, so you would add like normal to get 7n + 4n = 11n.

A Cepheid variable star is a star whose brightness alternately increases and decreases. For a certain star, the interval between times of maximum brightness is 4.2 days. The average brightness of this star is 3.0 and its brightness changes by ±0.25. In view of these data, the brightness of the star at time t, where t is measured in days, has been modeled by the function B(t) = 3.0 + 0.25 sin 2πt 4.2 . (a) Find the rate of change of the brightness after t days. dB dt =

Answers

Answer:

a) $(dB)/(dt) = (5\pi)/(4.2) \cdot \cos \left(2\pi\cdot (t)/(4.2) \right)$ , b) $(dB)/(dt)\approx 5.595$

Step-by-step explanation:

a) The rate of change of the brightness of the Cepheid can be determined by deriving the function in time:

$(dB)/(dt) = \left((2\pi)/(4.2) \right)\cdot 0.25\cdot \cos (2\pi\cdot (t)/(4.2))$

$(dB)/(dt) = (5\pi)/(4.2) \cdot \cos \left(2\pi\cdot (t)/(4.2) \right)$

b) The rate of increase after one day is:

$(dB)/(dt) = (5\pi)/(4.2) \cdot \left(2\pi \cdot (1)/(4.2) \right)$

$(dB)/(dt)\approx 5.595$

A decision maker is considering including two additional variables into a regression model that has as the dependent variable, Total Sales. The first additional variable is the region of the country (North, South, East, or West) in which the company is located. The second variable is the type of business (Manufacturing, Financial, Information Services, or Other). Given this, how many additional variables will be incorporated into the model?a. 9
b. 8
c. 6
d. 2

Answers

Answer: Option d.

Step-by-step explanation:

The aditional variables are:

Region of the country. (where the options are Noth, Sout, East or West)

Type of business (where the options are Manufacturing, Financial, Information Services, or Other)

Then we are only adding 2 aditional variables to the model, the correct option is d.

A total of 707
tickets were sold for the school play. They were either adult tickets or student tickets. There were
57
more student tickets sold than adult tickets. How many adult tickets were sold?

Answers

325 adult tickets, 382 student

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Susan started with a certain number of dollars. She then decided on a number of dollars she would save each day. She added the dollars she saved to the amount with which she started. At the end of day 2, Susan had a total of 20 dollars saved. At the end of day 5, she had a total of 32 dollars saved. How many dollars does Susan start with? Show or explain your work. Write an equation to model the number of dollars Susan has saved, y, after x days.