All categories

3 years ago

Suma doua numere este 702.Diferenta lor este un sfert din scazator .Afla cele doua numere dAU COROANA

Mathematics

1 answer:

Molodets [167]3 years ago

8 0

Answer:

Cele două numere căutate sunt:

390
312

Step-by-step explanation:

Pentru a rezolva necunoscutul cu aceste două numere, trebuie create două ecuații cu două necunoscute X și Y cu informațiile obținute: În primul rând, știm că suma celor două numere este egală cu 702, prin urmare:

1. X + Y = 702

Apoi se menționează că diferența (adică scăderea) dintre cele două numere este egală cu un sfert din numărul cel mai mic, pentru a avea o referință, vom identifica variabila Y ca fiind cel mai mic număr, deci a doua ecuație ar fi:

2. X - Y = 0,25Y sau Y / 4

Ștergem variabila X în a doua ecuație:

X - Y = 0,25Y
X = 0,25Y + Y
X = 1,25Y

Ecuația 1 este acum folosită cu X-ul șters:

X + Y = 702
1,25Y + Y = 702
2,25Y = 702
Y = 702 / 2,25
Y = 312

Acum, din moment ce se știe că este X = 1.25Y, valoarea lui Y este înlocuită și obținem:

X = 1,25Y
X = 1,25 * 312
X = 390

You might be interested in

Instructions for a blanket call for 36 yards of yarn. A skein of yarn has 6 feet in in. How many skeins of yarn do you need?

Aloiza [94]

For this case the first thing you should know is the following unit conversion:
1 yard = 3 feet
Applying the conversion we have:
6 * (1/3) = 2 yards
Therefore the number of skeins of yarn is:
N = (36) / (2)
N = 18
Answer:
You need 18 skeins of yarn

5 0

3 years ago

Which expressions are equivalent to 2 (a + 3b)?

VARVARA [1.3K]

Answer:

A & B

Step-by-step explanation:

A is spot-on because of the use of distributive property. B by the use of like terms.

8 0

3 years ago

Jocelyn estimates that a piece of wood measures 5.5 cm. If it actually measures 5.62 cm, what is the percent error of Jocelyn's

Vadim26 [7]

Answer:

is d

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Suppose a scientist reported the following data regarding the presence bacteria during the first four hours of testing for a new

OlgaM077 [116]

The recursive geometric sequence that models this situation is:

$f(n) = 0.9f(n-1)$

$f(1) = 90000$

<h3>What is a geometric sequence?</h3>

A geometric sequence is a sequence in which the result of the division of consecutive terms is always the same, called common ratio q.

It can be represented by a recursive sequence as follows:

$f(n) = qf(n-1)$

With f(1) as the first term.

In this problem, the sequence is: 90.000: 81,000; 72,900; 65,610, hence:

$q = \frac{65610}{72900} = \cdots = \frac{81000}{90000} = 0.9$

$f(1) = 90000$

Hence:

$f(n) = 0.9f(n-1)$

$f(1) = 90000$

More can be learned about geometric sequences at brainly.com/question/11847927

7 0

2 years ago

the combined area of two squares is 45 square centimetres each side is twice as long as a side of the other square what length o

Ostrovityanka [42]

Answer:

Let the side of one square be x. Area = x*x = x²

Then the side of other square would be 2x , Area = 2x*2x = 4x²

Combined area = x² + 4x² = 5x²

This combined area = 45 cm²

you simplify

Therefore 5x² = 45 Divide both sides by 5

x² = 45/5

x² = 9 Take square root of both sides

x = √9

x = 3

Length of larger square is 2x = 2*3 = 6 cm

Length of larger square = 6cm

Step-by-step explanation:

4 0

3 years ago