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pav-90 [236]
3 years ago
6

Find the inverse of the function. y = 3x-9

Mathematics
1 answer:
Artemon [7]3 years ago
5 0

Answer:

(x/3) - 3 = f^-1(x)

Step-by-step explanation:

y = 3x-9

x = 3y-9

x - 9 = 3y

(x/3) -(9/3) = y

(x/3) - 3 = f^-1(x)

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Please help!<br><br> Find the product AB, if possible. Explain if it's not possible.
soldi70 [24.7K]

Answer:  c

<u>Step-by-step explanation:</u>

When multiplying matrices, multiply ACROSS with the left matrix and DOWN with the right matrix.

\text{Example}:\left[\begin{array}{cc}a&b\\c&d\end{array}\right] \times \left[\begin{array}{c}x\\y\end{array}\right] =\left[\begin{array}{c}ax+by\\cx+dy\\\end{array}\right]

\left[\begin{array}{cc}5&2\\3&-1\end{array}\right] \times \left[\begin{array}{c}2\\3\end{array}\right] =\left[\begin{array}{c}5(2)+2(3)\\3(2)-1(3)\\\end{array}\right] = \left[\begin{array}{c}16\\3\end{array}\right]

8 0
3 years ago
Marina can make 36 cupcakes in 45 minutes. How long will it take for her to make 108 cupcakes?
marta [7]
Answer:
135 minutes

Explanation:
36 cupcakes in 45 minutes can be written as \frac{36}{45}, so to find how long 108 will take, you can find it by equating these two fractions:
\frac{36}{45} = \frac{108}{x} 
Simplify by cross division:
divide 45 and 108 by 3 to simplify into this:
\frac{36}{15} = \frac{36}{15}
x = 15 
The rate is 3, so 45 • 3 = 135 minutes.

Another way of looking at it is this:
108 ÷ 36 = 3 this is the rate that you need to multiply the amount of time that it takes to make the cupcakes, so:
45 • 3 = 135 minutes.
5 0
4 years ago
Read 2 more answers
Hi can someone help me by explaining how to do inverse operations? I need the operations for base and lenght
taurus [48]

Answer:

inverse operations (KristaKingMath)

7 0
4 years ago
What is the solution of the equation? 3(y-5)+2=5​
Marizza181 [45]

Answer:

Y=- 6

3(y-5)+2=5

multiply

3y-15+2=5

add

3y-13=5

add pos 13 to the neg 13 to

cancel it out and add +13 to 5

3y=18

divide -3 to pos 3 and 18 to cancel it out

y= -6

3 0
3 years ago
An AP Statistics class starts a project to estimate the average number of hours a student at their high school sleeps per night.
8090 [49]

Answer:

C) Sample: the 120 students surveyed. Population: the 1200 students at the high school. Parameter of interest: the average number of hours a student at this high school sleeps per night.

Step-by-step explanation:

  • Population is the total units of study for the research.
  • Sample is the selected units, chosen for conducting the research study.
  • Parameter of interest is the  characteristic or variable, that is studied related to the population or sample

Research of average hours of sleep in a school; on the basis of 120 students selected for the study; are :-

  • Population is the total number of students in the school, i.e = 1200 students
  • Sample is the selected number of students, chosen (enquired) for the study, i.e = 120 students
  • The parameter of interest is the variable of students, that needs to be studied, i.e average sleep hours.
4 0
3 years ago
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