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
Brilliant_brown [7]
3 years ago
13

Two numbers are of the ratio 3:5. If their difference is 18, find the numbers.​

Mathematics
1 answer:
Sergio039 [100]3 years ago
4 0

x \div y = 3 \div 5  \\ it \: means  =  \\ 3y = 5x \\ x - y = 18 \\

To solve we multiply the last equation by 5 and we get the following:

5x-5y=90

But 5x=3y and we replace it in this equation:

3y-5y=90

-2y=90

y=-45

and x-(-45)=18 , x+45=18

x=-27

You might be interested in
What is the area of triangle pqr on the grid? a triangle pqr is shown on a grid. the vertex p is on ordered pair 7 and 6, vertex
horsena [70]

P(7,6), Q(1,6), R(4,2)

We have PQ parallel to the x axis. We'll call that the base,

b = 7 - 1 = 6

The altitude is then the y difference h = 6 - 2 = 4

The area is \frac 1 2 bh = \frac 1 2 (6)(4) = 12

Answer: 12 square units


In general we can use the shoelace formula for the area of any polygon given coordinates. We write the points like this:

(7,6), (1,6), (4,2)

(1,6), (4,2), (7,6)

The area is then half the absolute value of the sum of the cross products:

A = \frac 1 2 | 7(6)-6(1) + 1(2)-6(4) + 4(6)-2(7) | = \frac 1 2 |24| = 12


6 0
3 years ago
Read 2 more answers
If you apply the changes below to the cubic parent function, F(x)=x3, what is the equation of the new function if it reflects ac
gavmur [86]

Answer:

g(x) = 7(-x)³

Step-by-step explanation:

The cubic parent function is given as; f(x) = x³

Now, we are told that it reflects across the y-axis. This means that the new function will take the form;

g(x) = f(-x)

Thus, the new function is;

g(x) = (-x)³

Now,we are told that this new function stretches by multiplying by 7. Thus, we now have;

g(x) = 7(-x)³

6 0
3 years ago
Find the perimeter of the figure below. <br><br> someone plz help I have a test due today!! :(
TEA [102]
The triangle at top has a perimeter of 5, 12, and 13. The square has a perimeter of 29, 12, 29, and 12. If you add all those up you get 112
4 0
3 years ago
Please help on a maths question, Brainiest for the best answer!!!
ankoles [38]

Answer:

36.6 cm

Step-by-step explanation:

Each side, starting with the one all the way to the left and going anticlockwise.

7 + 4.3 + 7 + 4.3 + 7 + (7 - 4.3 = 2.7) + 4.3 = 36.6

4 0
3 years ago
Read 2 more answers
What is the reason: if a+c=b+c then a=b
Tomtit [17]

Step-by-step explanation:

Example 1:

a+c=b+c then a=b

First let the value of a and b be different (not equal)

a=5

b=7

c=10

a+c=b+c

5+10=7+10

15≠17

Example 2:

Let the value a and b be equal (the same)

a=5

b=5

c=10

a+c=b+c

5+10=5+10

15=15

So when,

a+c and b+c is equal, a and b are <u>always</u><u> </u> equal.

Hope this helps ;) ❤❤❤

8 0
3 years ago
Read 2 more answers
Other questions:
  • Is this function linear or nonlinear?<br> y=3x−5 also pls tell me how you found it out
    15·1 answer
  • A right rectangular prism has a length of 5 centimeters, a width of 8 centimeters, and a height of 4
    14·2 answers
  • Could someone give me step by step instructions PLEASE! Thanks so much!!
    5·2 answers
  • Given f(x) = 2x + 9, if f(x) = 15, find x.​
    8·1 answer
  • Which expression is equivalent to square root of -80
    8·2 answers
  • What is the purpose of tax-differed retirement accounts
    11·1 answer
  • What is the value of n? 133 142 n
    15·2 answers
  • Help pls!!!!!
    5·2 answers
  • { y = 3<br> 1. {}<br> = x - 3
    13·2 answers
  • Find the sum.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!