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
Yuliya22 [10]
3 years ago
12

Petra invests $10,800. After 4 years she has earned $3240 in interest.

Mathematics
1 answer:
sweet-ann [11.9K]3 years ago
6 0

Answer:

Rate =interest*100/principal*time

Rate = 7.5%

Step-by-step explanation:

You might be interested in
If y= 6 when x= 24, find the value of x when y= 7
Shtirlitz [24]

Answer:

x=28

Step-by-step explanation:

the y to x ratio is 1:4 or in other words all you need to do is multiply the y by 4 to get your new x value

-Hope this helps

3 0
3 years ago
Read 2 more answers
A "B" grade on a test is 85%. How many questions can you miss on a 35-question exam and get a<br> B.
vekshin1

Answer:

5

Step-by-step explanation:

If all question are worth same same amount of points, you can miss 5 questions out of 35 and get an 86. If you miss 6 questions you would get an 83.

hope this helped!

4 0
2 years ago
Read 2 more answers
65% of the 800 students at North High School ride the
jonny [76]

Answer:

520 out of 800 students ride the bus

Step-by-step explanation:

Given

Proportion = 65\%

Students = 800

Required

Determine the number of students that\ ride\ the\ bus

To do this, we simply multiply the proportion by the total number of students.

i.e.

Bus = Proportion * Students

Bus = 65\% * 800

Express the percentage as decimal

Bus = 0.65* 800

Bus = 520

<em />

6 0
3 years ago
Please Help Me On These Math Questions!!!!! Solve Each System By Elimination
nekit [7.7K]
11) -x + y = -1 ; 2x - y = 0
y = -1 + x ; 2x - (-1+x) = 0 ⇒ 2x + 1 - x = 0 ⇒x = -1 
y = -1 + (-1) ⇒ y = -2

12) -2x + y = -20 ; 2x + y = 48
y = -20 + 2x ; 2x + (-20 + 2x) = 48 ⇒ 2x -20 + 2x = 48 ⇒ 4x = 48 + 20
                      4x = 68 ⇒ x = 68/4 ⇒ x = 17
y = -20 + 2(17) ⇒ y = -20 + 34 ⇒ y = 14

13) 3x -y = -2 ; -2x + y = 3
y = 3 + 2x ; 3x - (3 + 2x) = -2 ⇒ 3x - 3 - 2x = -2 ⇒ x = -2 + 3 ⇒ x = 1
y = 3 + 2(1) ⇒ y = 3 + 2 ⇒ y = 5

14) x - y = 4 ; x - 2y = 10
x = 4 + y ; (4 + y) - 2y = 10 ⇒ 4 + y - 2y = 10 ⇒ 4 - y = 10 
                  ⇒ -y = 10 - 4 ⇒ -y = 6 ⇒  y = -6
x = 4 + (-6) ⇒ x = 4 - 6 ⇒ x = -2

15) x + 2y = 5 ; 3x + 2y = 17
x = 5 - 2y ; 3(5-2y) + 2y = 17 ⇒ 15 - 6y + 2y = 17 ⇒ -4y = 17 - 15
               ⇒ -4y = 2 ⇒ y = -2/4 ⇒ y = -1/2
x = 5 - 2(-1/2) ⇒ x = 5 + 2/2 ⇒ x = 5 + 1 ⇒ x = 6 
5 0
3 years ago
Read 2 more answers
I HONESTLY NEED HELP!!
Natali5045456 [20]

Answer:

B

Step-by-step explanation:

an additional hour of walking is associated with an additional 0.7 mile walk

7 0
2 years ago
Other questions:
  • Stewart has $26 dollars. He spent $12.81, including tax, to buy a new DVD. He needs to set aside $10.00 to pay for his lunch nex
    15·2 answers
  • Is 19,279 divisibility by 2
    15·2 answers
  • What is the value of x in the equation 1/5x - 2/3y =30 when y =15 ?
    10·2 answers
  • Toya can run one lap of the track in 1 min. 3 sec., which is 90% of her younger sister niki's time. what is niki's time for one
    10·1 answer
  • Help asap please:) i don’t know
    5·1 answer
  • Determine the eccentricity, the type of conic, and the directrix for r = 9/1+6 cos theta. (Picture Provided Below)
    12·2 answers
  • What is the length of the hypotenuse?
    10·2 answers
  • Franco bought 2 cans of paint and 1/2 of a pint of special paint additive formulated to reduce
    8·1 answer
  • What is the slope of the line on the graph?​
    14·1 answer
  • Two of the angles in a triangle measure 154° and 20°. What is the measure of the third angle?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!