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
marissa [1.9K]
3 years ago
7

The amount of money Sally earns, P, varies directly with the number, n, of necklaces she sells. When Sally sells 15 necklaces, s

he earns $150. Write the equation that relates P and n. How much money would she earn if she sold 4 necklaces?
Mathematics
1 answer:
maksim [4K]3 years ago
4 0

Answer:

Equation: P = 10n

P = 40 when n = 4

Step-by-step explanation:

Given

Direct Variation: P ∝ n

When n = 15, P = 150

Required

Determine the equation

Her earnings if she sold 4 necklaces

P ∝ n

Convert variation to equation

P = kn

When P = 150, n = 15 (Substitute these values in the given equation)

150 = k * 15

Divide both sides by 15

\frac{150}{15} = \frac{k * 15}{15}

10 = k\\k = 10

Substitute k = 10 in P = kn

P = 10 * n

P = 10n ------- Equation that relates P and n

When she sold 4 necklaces, n = 4

Substitute n = 4 in the formula above

P = 10 * 4

P = 40

You might be interested in
n a group of 40 people, 10 people are healthy. The 30 unhealthy people have either high blood pressure, high cholesterol, or bot
aalyn [17]

Answer:

If a person is randomly selected from this group, the probability that they have both high blood pressure and high cholesterol is P=0.25.

Step-by-step explanation:

We can calculate the number of people from the sample that has both high blood pressure (HBP) and high cholesterol (HC) using this identity:

N(\text{HBP or HC})=N(\text{HBP})+N(\text{HC})-N(\text{HBP and HC})\\\\\\ N(\text{HBP and HC})=N(\text{HBP})+N(\text{HC})-N(\text{HBP or HC})\\\\\\ N(\text{HBP and HC})=15+25-30=10

We can calculate the probability that a random person has both high blood pressure and high cholesterol as:

P(\text{HBP and HC})=\dfrac{10}{40}=0.25

3 0
3 years ago
Which of the following is a Geometric Series?
Katarina [22]

I dont know the answer

Step-by-step explanation:

little girl I am sorry

8 0
3 years ago
Seven students cut 5 and three-fourths inches of thread from a spool for a school project. What number represents the change in
dalvyx [7]

Answer:

-40 1/4

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
If 3 + root8 by 3-root8 + 3-root8 by 3+root8 = a+broot2 find a and b
s2008m [1.1K]

If \frac{3+\sqrt{8} }{3-\sqrt{8} } +\frac{3-\sqrt{8} }{3+\sqrt{8} }=a+b\sqrt{2}, the value of a and b is given as a = 34 and b = 0

<h3>What is an equation?</h3>

An equation is an expression that shows the relationship between two or more variables or numbers.

\frac{3+\sqrt{8} }{3-\sqrt{8} } +\frac{3-\sqrt{8} }{3+\sqrt{8} }\\ \\\frac{9+6\sqrt{8}+8+9-6\sqrt{8}+8  }{(3-\sqrt{8} )(3+\sqrt{8} )} \\\\\frac{34}{9-8} =34+0\sqrt{2}

If \frac{3+\sqrt{8} }{3-\sqrt{8} } +\frac{3-\sqrt{8} }{3+\sqrt{8} }=a+b\sqrt{2}, the value of a and b is given as a = 34 and b = 0

Find out more on equation at: brainly.com/question/2972832

#SPJ1

8 0
2 years ago
Write a linear equation in standard form that satisfies the given set of conditions. X-intercept: 3, y-intercept: 5
Artyom0805 [142]

The linear equation in standard form is y=\frac{-5}{3}x +5.

<h3>Linear Function</h3>

An equation can be represented by a linear function. The standard form for the linear equation is: ax+b , for example, y=7x+2. Where:

a= the slope. It can be calculated for  \frac{\Delta x }{\Delta y}.

b= the constant term that represents the y-intercept.

The question gives: X-intercept:3  and  y-intercept: 5. Then,

  • The x-intercept is the point that y=0, then the x-intercept point is (3,0).
  • The y-intercept is the point that x=0, then the x-intercept point is (0,5).

With this information, you can find the slope (a).

a=\frac{\Delta y }{\Delta x}= \frac{0-5}{3-0} =\frac{-5}{3}

The question gives the coefficient b since it gives the y-intercept=5.

Therefore the linear equation is : y=\frac{-5}{3}x +5.

Read more about the linear equations here:

brainly.com/question/2030026

#SPJ1

4 0
2 years ago
Other questions:
  • If b is the midpoint of ac, find bc (ab=3x-1 and ac=8x-20)
    5·1 answer
  • What's the rule? X10 5 25 y 41 21 101
    14·1 answer
  • Find the prime factorization of 245
    5·2 answers
  • NEED HELP PLEASEE!!! I START SCHOOL TOMORROW
    8·2 answers
  • Richard is making two batches of biscuits and gravy at a community breakfast. Each batch requires 1⁄2 teaspoon of salt, 1⁄3 teas
    15·1 answer
  • Which of the following has the greatest absolute value? Select one: A. -19 B. 0 C. 8 D. -11
    13·2 answers
  • What is the value of f(g(3))
    7·2 answers
  • What does it mean to add a negative number?
    7·2 answers
  • I need help please... 30 points + brainliest if u answer all 5
    6·1 answer
  • A relation is given below.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!