MATHEMATICS HIGH SCHOOL

Let f(x) = 2x + 5. Simplify: f^-1(f(4))

1/13
-13
13
31
4

Answers

Answer 1
Answer: f(x) = 2x + 5

x = 4

f(4) = 2(4) + 5
f(4) = 8 + 5
f(4) = 13

f^-1(f(4)) = 1 / 2(4) + 5 = 1 / 8 + 5 = 1/13

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B 1page /3min
C 16in./16sec
D 67miles/60min

Answers

Answer:

Option A.

Step-by-step explanation:

The question asked for a unit rate. This means that there should be no denominator higher than 1. Option A is the only one which have a denominator of 1.

13. John and Jane ate lunch at a local restaurant and wanted to divide the bill evenly. Thebill for the food was $8.70, plus 2 sodas for $0.75 each, including tax. How much
money back should just John receive if he pays for his half with a $20 bill?

Answers

John will receive $9.80 back

Will someone PLEASE check my answers asap?? will mark a brainliest!!1) The graph of f(x) = (0.5)x is replaced by the graph of g(x) = (0.5)^x − k. If g(x) is obtained by shifting f(x) down by 3 units, the value of k is ____


2) Find an equivalent function to f(x) = 4(7)2x.

A) f(x) = 282x
B) f(x) = 4(49)x
C) f(x) = 196x
D) f(x) = 16x(49)x



3) The functions f(x) and g(x) are described using the following equation and table:

f(x) = −6(1.02)^x

x g(x)
−1 −5
0 −3
1 −1
2 1

Which equation best compares the y-intercepts of f(x) and g(x)?


a) The y-intercept of f(x) is equal to the y-intercept of g(x).
b) The y-intercept of f(x) is equal to 2 times the y-intercept of g(x).
c) The y-intercept of g(x) is equal to 2 times the y-intercept of f(x).
d) The y-intercept of g(x) is equal to 2 plus the y-intercept of f(x).



4) What is the value of x in the solution to the following system of equations? (5 points)

x − y = −3
x + 3y = 5

For #1 i put in 3 as the answer.
For #2 i put B as the answer.
For #3 i put B as the answer.
For #4 i put 2 as the answer.

Answers

Answer:

1) 3

2) B

3) B

4) x=-1

Step-by-step explanation:

1) The graph of f(x) = (0.5)^x is replaced by the graph of g(x) = (0.5)^x-k. If g(x) is obtained by shifting f(x) down by 3 units, the value of k is 3.

2) Consider the function f(x)=4(7)^(2x). Note that 7^(2x)=(7^2)^x=49^x. Then

f(x)=4\cdot 49^x.

3) The y-intercept of f(x) is point (0,-6), because f(0)=-6\cdot (1.02)^0=-6. The y-intercept of g(x) is point (0,-3). Then the y-intercept of f(x) is equal to 2 times the y-intercept of g(x).

4) From the first equation x=y-3. Substitute it into the second equation:

y-3+3y=5,\n \ny+3y=5+3,\n \n4y=8,\n \ny=2.

Then x=2-3=-1.

All of your answers are correct, except the last one.

The last one is a system of linear equations that you can solve by using elimination:

x - y = -3

x + 3y = 5

Subtract the two equations:

-4y = -8

y = 2

Use y to solve for x:

x - (2) = -3

Add 2 to both sides:

x = -1

The answer for #4 is x = -1.

Select all that apply.Which of the following could you use to find 40% of 32?

0.4 · 32
2/5 · 32
40/100 · 32
32/40

Answers

40/100= 0.4: 0.4x=32: x= 32/0.4 x=80
the answer your looking for is 80% or 80over100 or 80

What 2 numbers add up to get 17 and multiply to get -200

Answers

There is no fixed equation when I arrived at these numbers.

I just did trial and error. I came up with 25 and -8 as the numbers.

200 ÷ 25 = 8 ⇒ the sum of 17 depends on the signs of each numbers.

-8 x 25 = -200

-8 + 25 = 17

CJ wrote several pairs of values that he thought wereequivalent. Which of his equations are correct? Pick all that
apply.
1.25 = 125%
0.03 = 30%
0.001 = 1%
60%
50%
22 23 를
66.6%
Guys I need help I’m gonna fail math

Answers

Answer:

125% correct

3/5 correct

2/3 correct

Step-by-step explanation:

Here, we want to pick the appropriate conversion from percentage to fraction:

To convert from percentage to fraction, we simply divide by 100

125% = 125/100 = 1.25 correct

30% = 30/100 = 0.3 not 0.03 wrong

1% = 1/100 = 0.01 not 0.001 wrong

60% = 60/100 = 3/5 correct

50% = 50/100 = 1/2 not 1/4 wrong

2/3 = 2/3 * 100 = 200/3 = 66.66667% correct

Answer:

B.C,D

Step-by-step explanation:
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