1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Zinaida [17]
3 years ago
14

Catherine paid $185.30 for an MP3 player. If the price paid includes a 9% sales tax, which of the following equations can be use

d to determine the price of the MP3 Player before tax? (Let x represent the cost of the MP3 player and y represent the total cost after tax.)
Mathematics
1 answer:
Wittaler [7]3 years ago
8 0

y = $185.30

x = the orignal cost minus 9% or .09. To increase an objects value by 9% you need to multiply by 1 + .09 or 1.09. So, x being increases by 9% would equal y or $185.30

1.09x = y

1.09x = $185.30

Divide both sides by 1.09

x = $170

You might be interested in
A sign in a bakery gives these options: • 12 cupcakes for $29 • 24 cupcakes for $56 • 50 cupcakes for $129 Find each unit price
crimeas [40]

Answer:

a) $2.44 per cupcake

b) $2.33 per cupcake

c) $2.58 per cupcake

Step-by-step explanation:

We are given the following in the question:

We have to calculate the unit price of the cupcakes.

Unit price =

=\dfrac{\text{Total Cost}}{\text{Number of cupcakes}}

12 cupcakes for $29

Unit price =

=\dfrac{29}{12}=2.43\text{ Dollar per cupcake}

24 cupcakes for $56

Unit price =

=\dfrac{56}{24}=2.33\text{ Dollar per cupcake}

50 cupcakes for $129

Unit price =

=\dfrac{129}{50}=2.58\text{ Dollar per cupcake}

3 0
3 years ago
Which equation is represented by the intersection of the graphs below?<br><br> Image is above.
zaharov [31]

Option B:

sin x = 1 is the equation represented by the intersection of the graph.

Solution:

The graph lies between -1 and 1 in y-axis.

x-axis of the graph is all real numbers.

The graph oscillates between -1 and 1 and a shape that repeats itself every 2π units.

That is the domain of the graph is all real numbers.

The range of the graph is [-1, 1].

It clearly shows that, it is the graph of sinx = 1.

Hence sin x = 1 is the equation represented by the intersection of the graph.

Option B is the correct answer.

3 0
3 years ago
Pre calculus, trigonometry Given point M the ordered pair 6 times the square root of 3 comma negative 6 comma which is located o
Nikitich [7]

The possible form of the point (6√3, - 6) in polar form are (r₁, θ₁) = (12, 11π / 6), (r₂, θ₂) = (12, - π / 6).

<h3>How to derive the polar form of a point in rectangular form</h3>

In this problem we find a point in rectangular form, that is, a point of the form (x, y). We are asked to find the polar form of the point, that is, a point described by the following expression:

(r, θ)

Where:

  • r - Magnitude
  • θ - Direction, in radians

The magnitude is found by Pythagorean theorem:

r =√(x² + y²)

And the direction of the point is described by the following inverse trigonometric function:

θ = tan⁻¹ (y / x)

If we know that (x, y) = (6√3, - 6), then the point in polar form is:

r = √[(6√3)² + (- 6)²]

r = 12

θ = tan⁻¹ (- 6 / 6√3)

θ = tan⁻¹ (- √3 / 3)

θ = 11π / 6 rad / θ =  - π / 6 rad

There are two possible solutions: (r₁, θ₁) = (12, 11π / 6), (r₂, θ₂) = (12, - π / 6).

To learn more on point in polar form: brainly.com/question/13103661

#SPJ1

7 0
1 year ago
(04.02 MC)
Elena L [17]

Answer:

0.1384

Step-by-step explanation:

Using binomial probability:

P = nCr p^r q^(n-r)

where n is the number of trials,

r is the number of successes,

p is the probability of success,

and q is the probability of failure (1-p).

Given n = 25, r = 4, p = 0.10, and q = 0.90:

P = ₂₅C₄ (0.10)⁴ (0.90)²⁵⁻⁴

P = 12650 (0.10)⁴ (0.90)²¹

P = 0.1384

6 0
3 years ago
Graph: y = 4x + 7. ​
Oksana_A [137]

Answer:

the points are (0,7) and (-1.75, 0)

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • Dividing one number by another results in the _____ of one number to the other.
    8·2 answers
  • Which is the area of a square with one side that measures 1 foot? A. 1 square inch B. 100 square inches C. 144 square inches D.
    5·1 answer
  • Solve for x 3(8x-5)=-4(7-6x)
    13·2 answers
  • Help math please thank you
    15·1 answer
  • 16/25 as a decimal fraction in simplest form
    14·1 answer
  • Please help with 10!
    6·1 answer
  • Hey school earn $70 from selling 50 tickets for the school play each ticket cost the same price how much does the school earn fo
    12·1 answer
  • I need help fast 17 points please help​
    12·1 answer
  • Write in base two the following numbers: one, two, four, eight, and sixteen.
    12·1 answer
  • Factorise 2-y(7-5y) please
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!