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
Marta_Voda [28]
3 years ago
6

After 9 months, the simple interest earned on an investment of $1200 is $72. find the interest rate.

Mathematics
1 answer:
Deffense [45]3 years ago
7 0
Use the formula i=prt, where i is the interest earned, p is the principal, r is the rate (as a decimal fraction) and t is the elapsed time, in years.

Here i = $72 = $1200 r (9/12)                    (9 months is 9/12, or 3/4, of 1 year)
Reducing, 
              $72 = $900r
                                          Solving for r, r=0.08, or 8 percent per year.
You might be interested in
7 divided by 2-4.5x3+8
lord [1]

Answer:

2-4.5×3+8=-3.8

-3.8÷7=-0.5

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Is this a polygon? If it is not a polygon please say why.​
Eva8 [605]

Answer:

if you where trying to draw it straight then yes it is a polygon but if it is supposed to be rounded then no it is not.

Step-by-step explanation:

a plane figure with at least three straight sides and angles, and typically five or more.

8 0
3 years ago
Read 2 more answers
Graph the function.<br> h(x) = -4(x– 3) (x - 1)
Stells [14]

Here is the graphed equation :)

8 0
3 years ago
angelo rode his bike around a bike trail that was 1/4 of a mile long.he rode his bike around thetrail 8 times.Angelo says he rod
forsale [732]
Hi there!

From this problem we can pull out some key information and remove any excess.

- The trail is 1/4 of a mile long.
- Angelo rode around the trail 8 times.
- Angelo claims he rode 8/4 miles.
- Teresa claims he rode 2 miles.

From that we know that if Angelo rode around the trail 8 times and the trail is 1/4 a mile, he in total rode 8/4 of a mile.

However, Teresa claims he rode 2 miles!

And the answer is... they're both correct!

Angelo did indeed ride 8/4 miles however that is equivalent to 2 miles so they are both in the right.
7 0
3 years ago
1. What is an equation for the line with slope 2/3 and y-intercept 9?
Monica [59]
Question 1:

 The generic equation of the line is given by:
 y = mx + b&#10;
 Where,
 m: slope of the line
 b: cutting point with the y axis
 Substituting values ​​we have:
 y = \frac{2}3}x + 9&#10;
 Answer:
 an equation for the line with slope 2/3 and y-intercept is:
 y = \frac{2}3}x + 9

 Question 2:

 The standard equation of the line is given by:
 y-yo = m (x-xo)&#10;
 Where,
 m: slope of the line
 (xo, yo): ordered pair that belongs to the line
 The slope of the line is:
 m =  \frac{y2-y1}{x2-x1}
 Substituting values:
 m = \frac{1-(-3)}{3-1}
 m = \frac{1+3}{3-1}
 m = \frac{4}{2}
 m = 2&#10;
 We choose an ordered pair:
 (xo, yo) = (3, 1)&#10;
 Substituting values:
 y-1 = 2 (x-3)&#10;
 Rewriting:
 y = 2x - 6 + 1&#10;&#10;y = 2x - 5
 Answer:
 An equation in slope-intercept form for the line that passes through the points (1, -3) and (3,1) is:
 y = 2x - 5&#10;

 Question 3:

 For this case, since the variation is direct, then we have an equation of the form:
 y = kx&#10; Where,
 k: constant of variation.
 We then have the following equation:
 -4y = 8x&#10; Rewriting we have:
 y = \frac{8}{-4}x&#10;
 y = -2x&#10; Therefore, the constate of variation is given by:
 k = -2&#10;
 Answer:
 the constant of variation is:
 k = -2

 Question 4:

 For this case, since the variation is direct, then we have an equation of the form:
 y = kx&#10; Where,
 k: constant of variation.
 We must find the constant k, for this we use the following data:
 y = 24 when x = 8
 Substituting values:
 24 = k8&#10; Clearing k we have:
 k =  \frac{24}{8} &#10;
 k = 3&#10;
 Therefore, the equation is:
 y = 3x&#10; Thus, substituting x = 10 we have that the value of y is given by:
 y = 3 (10)&#10;&#10;y = 30 Answer:
 the value of y when x = 10 is:
 y = 30
6 0
3 years ago
Read 2 more answers
Other questions:
  • Nik, a social worker for a county, helps county residents who are struggling with different issues. Nik logs the following hours
    6·1 answer
  • Caleb earns points on his credit card that he can use towards future purchases. He earns four points per dollar spent on flights
    7·1 answer
  • Median of 40 49 62 56 68 39 50 61 54 44
    12·2 answers
  • Help me please!!❤️❤️
    5·1 answer
  • What is 8 (x+y) - 4 (x-y) ?
    15·1 answer
  • Element X decays radioactively with a half life of 9 minutes. If there are 760 grams of Element X, how long, to the nearest tent
    6·2 answers
  • Irina has 3 hours to finish her final math exam. Keeping in mind that there are 60 minutes in 1 hour, how much time, on average,
    12·2 answers
  • The spinner below is spun, then a month of the year is randomly selected. Find the probability of P(unshaded, then a month that
    8·1 answer
  • 2w^2-11w+12=0 solve using Quadratic
    15·2 answers
  • 12y + 29y +48y + 2ly + 13y + 7y
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!