Is this right i just wanted to make sure if my answer was right

A dealer sold 500 tennis racquets some were sold at $20 each and the rest were sold at $45 each. The total receipts from these s

arlik [135]

Answer:

He sold 100 rackets for $ 20

Step-by-step explanation:

To start, we have to make 2 equations, one that represents the number of rackets and the other the money

x + y = 500

x * 20 + y * 45 = 20000

we clear x in the first equation

x + y = 500

x = 500 - y

we replace x in the second equation with (500 - y)

x * 20 + y * 45 = 20000

(500 - y) * 20 + y * 45 = 20000

10000 - 20y + 45y = 20000

-20y + 45y = 20000 - 10000

25y = 10000

y = 10000/25

y = 400

we replace x in the first equation with the value obtained

x = 500 - y

x = 500 - 400

x = 100

He sold 100 rackets for $ 20

8 0

4 years ago

Read 2 more answers

What is the inverse of the function f(x)=4x?

KATRIN_1 [288]

To find an inverse function:
1. Write the function.
2. Replace f(x) with y.
3. Switch x and y.
4. Solve for y.
5. Replace y with $f^{-1}(x)$

Now let's follow the steps above and do it.
1. f(x) = 4x
2. y = 4x
3. x = 4y
4. y = x/4
5. $f^{-1}(x) = \dfrac{x}{4}$

4 0

4 years ago

A 12-sided number cube with the numbers 1 through 12 is rolled. Rounded to the nearest hundredth, the probability that the numbe

Gala2k [10]

Answer: 91.6666666667 pero lo redondeadas y te da de resultado 92.0% de probabilidades que no caiga un 4

Step-by-step explanation:divide 100 entre 12 y el resultado lo multiplicas por 11. no es como se saca la respuesta normalmente pero es una opción

8 0

3 years ago

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Which recursive formula can be used to generate the sequence shown, where f(1) = 5 and n > 1?

Degger [83]

The recursive formula $a_n = a_{n-1}-6$ can be used to generate the shown sequence