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
Anna11 [10]
2 years ago
10

How do i work this out?

Mathematics
1 answer:
Karo-lina-s [1.5K]2 years ago
5 0

She has 45% of the original amount left

<h3>Ratio and proportions</h3>

Fractions are written as a ratio of two integers

Given the following

Initial amount. = ∈4000


Amount given to her sister = 1/4 * 4000 = 1000

Amount given to her brother = 40% of 3000 = 1200

Amount left = 4000 - (1000+1200)

Amount left = ∈1800

Determine the percentage left

x * 4000 = 1800

x = 1800/4000

x = 0.45

x = 45%

Hence she has 45% of the original amount left

Learn more proportion here: brainly.com/question/19994681

#SPJ1

You might be interested in
PLEASE HELPPPPPPPPPPPPPPPPPPPP
skelet666 [1.2K]

Answer:

y = 5/8 x

Step-by-step explanation:

Since it goes through the origin, the y intercept is zero

8 0
3 years ago
A student usually saves $20 a month. He would like to reach a goal of saving $350 in 12 months. The student writes the equation
elena-14-01-66 [18.8K]

Answer:

Step-by-step explanation:

350=12(x+20)

(divide both sides by 12)

29.1667=x+20

(subtract 20 from both sides)

x=9.16667

X (9.17) is the additional amount of money the student must save each month in order to reach his goal.

3 0
3 years ago
In your own words, explain 3 or more sentences "how do you multiply rational number?" Tell how the signs, negative and positive,
vagabundo [1.1K]

Answer:

Rules & Examples of Integers multiplication.

Step-by-step explanation:

A rational number  is a number that can be expressed as a fraction of integers (positive or negative numbers). Every integer is a rational number.

They are multiplied based on following rules :

  • Positive (+) x Positive (+) = Positive (+) , +2 x +2 = 4
  • Positive (+) x Negative (-) = Negative (-) , +2 x -2 = -4
  • Negative (-) x Positive (+) = Negative (-) , -2 x +2 = -4
  • Negative (-) x Negative (-) = Positive (+) , -2 x -2 = 4

8 0
3 years ago
Read 2 more answers
Pleaseeee help! I'm really confused.
seropon [69]
He will be making a right triangle with the legs being 24 x 45. The diagonal will be the hypotenuse of the triangle. To find the amount of fencing we need the perimeter of the triangle.
Use Pythagorean theorem to find the length of the hypotenuse.
a^2 + b^2 = c^2
24^2 + 45^2 = c^2
576 + 2025 = c^2
2601 = c^2
sqrt 2601 = c
c = 51
Adding the three lengths the total fencing needed is
51+24+45=120 meters
8 0
3 years ago
One printing press can print the whole school newspaper in 12 hours, while another press can print in 18 hours. How long will th
rusak2 [61]

Answer:

7 Hours 12 Minutes

Step-by-step explanation:

So they one of the printer increases at a rate of 1/12 and the other increases at a rate of 1/18. Since you don't know the time it actually takes, you will replace both numerators with and x. (x/12 and x/18). You want to set these up so that they are adding. (x/12 + x/18=1). Since you're adding, you want to change it to the same denominator. The lowest is 36 so you multiply x/12 by 3/3 (so you don't unbalance the equation) and x/18 by 2/2. You'll end up with 3x/36 + 2x/36= 1 which will simplify to 5x/36=1. Multiply each side by 36 to leave the variable by itself. It becomes 5x=36 and when you divide it by 5 you get 7.2. So it's seven and .2 hours, which is equivalent to7 and 1/5 of an hour or 7 hours and 12 minutes.

8 0
3 years ago
Other questions:
  • +4.31. Let a(s) be a unit speed curve with kt = 0. Prove there is a curve
    6·1 answer
  • How do you do this question?
    7·1 answer
  • Determine the measure of each angle. Then describe each angle as acute, right, obtuse, or straight.
    6·1 answer
  • Determine the domain and range for the inverse of f(x) = 1/4x + 2
    10·1 answer
  • 15= a/3 -2 plz help so important
    15·2 answers
  • The combined yearly interest for x dollars invested at 13% and 20,000-x dollars invested at 8% is
    14·1 answer
  • Is it possible to draw a triangle with side lengths 4cm 7cm And 9cm
    6·1 answer
  • 3 folders cost $2.91. How much do 2 folders cost? Provide explanation.
    5·1 answer
  • What is 3.405 rounded to the nearest tenth of an ounce?
    11·1 answer
  • Jenny is preparing a roast chicken dinner in honour of her daughter coming back for the holidays after studying abroad. Her daug
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!