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
prisoha [69]
3 years ago
9

30% of Number A is the same as 40% of Number B.

Mathematics
1 answer:
Goryan [66]3 years ago
5 0

30% of number A means

\dfrac{30A}{100}=\dfrac{3A}{10}

similarly, 40% of number B means

\dfrac{40B}{100}=\dfrac{2B}{5}

These must be equal, so we have

\dfrac{3A}{10}=\dfrac{2B}{5}

Multiply both sides by 10 to get

3A=4B \iff A=\dfrac{4B}{3}

So, you can choose any number for A, and then you multiply it by 4/3 to get B. There are infinitely many solutions to this equation.

You might be interested in
What is the perimeter of the triangle?
Alex_Xolod [135]

Answer:

P = 38

Solution

P=a+b+c=15+8+15 = 38

PLZ GIVE BRAINLIESTTTTT

3 0
3 years ago
Read 2 more answers
Which type of triangle has side measures of 6 cm, 7 cm, and 12 cm and one angle with a measure of 120°?
melomori [17]
Obtuse scalene; there is no such thing as a right scalene or obtuse equilateral
5 0
3 years ago
Read 2 more answers
A computer store buys a computer system at a cost of $465.60. The selling price was first at $776, but then the store advertised
Diano4ka-milaya [45]

Answer: a: 543.2 b: 465.6

Step-by-step explanation:

a. find 30% of $776, which is 232.8. subtract 232.8 from 776.

b. find 40% of $776, which is 310.4. subtract 310.4 from 776

3 0
3 years ago
N a classroom of 33 students, the ratio of boys to girls is 3 : 8. How many boys are in the class?
tiny-mole [99]

3 boys + 8 girls = 11 students

3 boys/ 11 students = x boys /33 students

using cross products

3 * 33 = x*11

divide by 11

99/11 = x

x=9

There are 9 boys

4 0
3 years ago
The sum of a number, 1/6 of that number, 2 1/2 of that number, and 7 is 12 1/2. Find the number
Whitepunk [10]

Answer:

The sum of a number, 1/6 of that number, 2 1/2 of that number, and 7 is 12 1/2. Find the number?

the number is 2.409

Step-by-step explanation:

based on the question;

let the  number  N

1/6 of N = (1/6)N

21/2  of N = ( 5/2)N

now, the sum of  a number (N)  1/6 of that number(1/6)N , (5/2)N and 7  will be expressed as

N + ( 1/6)N + (5/2)N + 7 = 12 1/2

N + N/6 + 5N/2 + 7 = 25/2

find the lcm of the equation

we have;

(6N + N +15N + 42)/6= 25/2

(22N + 42)/6 = 25/2

Using cross multiplication we have

44N + 84 =  150

Collecting the like terms

44N = 150- 84

44N = 106

Divide both sides by 44

44N/44= 106/44

N = 2.409

3 0
3 years ago
Other questions:
  • A sprinter can run 319 feet and 11 seconds find the sprinters unit rate of feet per second
    5·2 answers
  • What is the solution set of |x – 4| + 7 = 4?
    9·1 answer
  • Select all of the expressions that equivalent to 4 radical 5​
    11·1 answer
  • I need help with this. I do not understand it.
    11·2 answers
  • What is the reciprocal of 6/9​
    14·2 answers
  • 4. State the number of positive real zeros for the polynomial
    13·1 answer
  • (3m^0)^3<br><br> A. 27cm3<br> B. 27
    15·1 answer
  • Please help! i have a hour remaining to finish this!
    9·1 answer
  • This is a 30-60-90 triangle.<br> What is the measure of x?<br> 3.8<br> A<br> Х<br> x = 1.9V[?]
    9·1 answer
  • Can someone please help me? It's 1:16am and its due at 7:15am. I've got school.
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!