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
lidiya [134]
2 years ago
14

Solve the following variation problem.

Mathematics
1 answer:
julia-pushkina [17]2 years ago
8 0

From the calculation done below, the interest when the rate is 9% is $101.25.

<h3>How interest is calculated using direct variation?</h3>

Since the interest on investment varies directly as the rate of interest, the relevant direct variation formula to use to calculate investment is as follows:

i = kr ................................. (1)

Where:

i = interest amount = $45

k = investment = ?

r = interest rate = 0.04

Substituting the values into equation (1) and solving for k, we have:

45 = k0.04

k = 45 / 0.04

k = $1,125

To find the interest when the rate is 9%, we substitute k = $1,125 and r = 9% into equation (1) as follows:

i = $1,125 * 9% = $101.25

Learn more about interest here: brainly.com/question/26457073.

#SPJ1

You might be interested in
Find the common difference for the sequence shown.<br><br><br><br> 56, 49, 42, 35, ...
NemiM [27]

Answer:

7

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Jill, Cathy, and Sand​y ​were in line for a roller coaster ride. How many ways could they be seated if the ride held 3 people in
vichka [17]

Answer:

6

Step-by-step explanation:

1x2x3=6

4 0
3 years ago
Justin’s baby brother weighs 10 pounds. How much does Justin’s baby brother weigh in kilograms?
vichka [17]

Answer:

he weights 4.53 kilograms!

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Write a polynomial of degree 5 with zero x=0,i square root 7, -2i
professor190 [17]

Answer:

P(x)=x^5+11x^3+28x

Step-by-step explanation:

<u>Roots of a polynomial</u>

If we know the roots of a polynomial, say x1,x2,x3,...,xn, we can construct the polynomial using the formula

P(x)=a(x-x_1)(x-x_2)(x-x_3)...(x-x_n)

Where a is an arbitrary constant.

We know three of the roots of the degree-5 polynomial are:

x_1=0;\ x_2=\sqrt{7}\boldsymbol{i}:\ x_3=-2\boldsymbol{i}

We can complete the two remaining roots by knowing the complex roots in a polynomial with real coefficients, always come paired with their conjugates. This means that the fourth and fifth roots are:

x_4=-\sqrt{7}\boldsymbol{i}:\ x_3=+2\boldsymbol{i}

Let's build up the polynomial, assuming a=1:

P(x)=(x-0)(x-\sqrt{7}\boldsymbol{i})(x+\sqrt{7}\boldsymbol{i})(x-2\boldsymbol{i})(x+2\boldsymbol{i})

Since:

(a+b\boldsymbol{i})\cdot (a-b\boldsymbol{i})=a^2+b^2

P(x)=(x)(x^2+7)(x^2+4)

Operating the last two factors:

P(x)=(x)(x^4+11x^2+28)

Operating, we have the required polynomial:

\boxed{P(x)=x^5+11x^3+28x}

7 0
3 years ago
I need some help on this
andrew-mc [135]

Answer:

b, k = -4

Step-by-step explanation:

3/2 = k + 11/2

=> 3/2 - 11/2 = k

=> -8/2 = k

=> k = -4

6 0
3 years ago
Read 2 more answers
Other questions:
  • You are planning on using circles to compare the populations of California 37,691,000, Texas 25,675,000, and New York 19,465,000
    12·1 answer
  • The given line passes through the points (-2,-4) and (2,2) What is the equation, in point-slope form, of the line that is parall
    5·1 answer
  • SIN x degrees = 8/10
    7·1 answer
  • 5/4 * 6/7 Multiply. Write your answer as a fraction in simplest form. Thank you btw
    6·2 answers
  • Write 1.005 as mixed number.Then write how to read this number aloud.
    7·1 answer
  • CAN YOU GUYS HELP ME FOR #10
    15·2 answers
  • El arquitecto Gómez, dirige el proyecto de remodelación del parque municipal del distrito La Esperanza. La forma del parque está
    7·1 answer
  • Write a recursive formula for the
    8·1 answer
  • Identify the linear function graph
    8·1 answer
  • Terri gets most of her exercise by walking briskly. Last year she walked an average of 4.2 miles per day with a standard deviati
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!