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3 years ago

Find the percent markup rounded to the nearest percent.

Mathematics

1 answer:

Bad White [126]3 years ago

6 0

Divide 1,800 by 300
1,800÷300=6

Subtract 6 from 10
10-6=4

Divide 4 by 6
4÷6

the answer is increase by 66%

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Easy - Math - INVERSES - NEED ASAP PLEASE AND THANK YOU VERY MUCH!

polet [3.4K]

Answer:

Part 1) No

Part 2) Option 4. $f^{-1}(x)=-\frac{1}{3}x+3$

part 3) $f^{-1}(9)=4$

Step-by-step explanation:

Part 1) we have

$f(x)=8x-3$

$g(x)=(x+8)/3$

Find the inverse of f(x) and then compare with g(x)

Let

y=f(x)

$y=8x-3$

Exchange the variables x for y and y for x

$x=8y-3$

Isolate the variable y

$8y=(x+3)$

$y=(x+3)/8$

Let

$f^{-1}(x)=y$

$f^{-1}(x)=(x+3)/8$

therefore

the functions f(x) and g(x) are not inverses of each other

Part 2) we have

$f(x)=-3x+9$

Let

y=f(x)

$y=-3x+9$

Exchange the variables x for y and y for x

$x=-3y+9$

Isolate the variable y

$3y=-x+9$

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

Let

$f^{-1}(x)=y$

$f^{-1}(x)=(-x+9)/3$

$f^{-1}(x)=-\frac{1}{3}x+3$

Part 3) we know that

For $x=4$ , $f(x)=9$

For $x=9$ , $f^{-1}(9)=4$

5 0

4 years ago

Give the solution set for the inequality 7x < 7(x - 2) in interval notation.

eduard

ANSWER:

The solution set for the inequality 7x < 7(x - 2) is null set $\varnothing$

SOLUTION:

Given, inequality expression is 7x < 7 × (x – 2)

We have to give the solution set for above inequality expression in the interval notation form.

Now, let us solve the inequality expression for x.

Then, 7x < 7 × (x – 2)

7x < 7 × x – 2 × 7

7x < 7x – 14

7x – (7x – 14) < 0

7x – 7x + 14 < 0

0 + 14 < 0

14 < 0

Which is false, so there exists no solution for x which can satisfy the given equation.

So, the interval solution for given inequality will be null set

Hence, the solution set is $\varnothing$

3 0

4 years ago

The linear equation c=0.1998s+76.4520 models the number of calories c in a beef hot dog as a function of the amount of sodium s

Aneli [31]

Answer:

have you tried photomath

Step-by-step explanation:

4 0

4 years ago

Read 2 more answers

Use the Commutative Property and compatible numbers to calculate the sum. Explain how you used mental math. 23. 3 + 36. 7

erik [133]

May i ask is it 3+26 or is there more

3 0

4 years ago

1 Find The average speed when a car travels for 130 miles in 2'12 hours?

makkiz [27]

Answer:

60.45

Step-by-step explanation:

7 0

3 years ago