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
marusya05 [52]
3 years ago
11

Pentru sala de mese a scolii s-au adus 12 scaune si 7 mese, plătindu-se 320lei.Știind că 4 scaune costă cât trei mese, află preț

ul unui scaun și prețul unei mese.
Mathematics
1 answer:
Wewaii [24]3 years ago
6 0

Răspuns:

Costul scaunului = 15

Costul mesei = 20

Explicație pas cu pas:

Dat fiind:

Să prețul scaunelor = c; pretul mesei = t

12c + 7t = 320 - - - (1)

4c = 3t; c = 3/4 t - - - (2)

Introducerea c = 3 / 4t în (1)

12 (3 / 4t) + 7t = 320

9t + 7t = 320

16t = 320

t = 320/16

t = 20

c = 3 / 4t

c = 3/4 (20)

c = 15

Costul scaunului = 15

Costul mesei = 20

You might be interested in
a temperature increase of 1 degree fahrenheit is equivalent to a temperature increase of 5/9 degree celsius
lana [24]

yes it is equal be or equivalent

4 0
3 years ago
Factor the expression completely.<br> -18 + 42x
Simora [160]

Answer:

factor the polynomial

6 (7x-3)

6 0
2 years ago
Read 2 more answers
Andy, Brenda, and Carla are running in a race. In how many different ways can the students finish in first, second, and third pl
nikklg [1K]

First place can be any one of the 3 competitors.    For each of those . . .
Second place can be either one of the 2 remaining.   For each of those . . .
Third place is the  1  remaining runner.

Total number of possibilities = (3 x 2 x 1) = <em>6</em> .

Here are all the possible ways they can finish:

1). A B C
2). A C B
3). B A C
4). B C A
5). C A B
6). C B A


7 0
4 years ago
Read 2 more answers
What percent of 75 is 72
Elan Coil [88]
It would be 96 percent
4 0
3 years ago
Read 2 more answers
Answer quick please I dont really get this
Triss [41]

Answer:

f(9) = 24

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

<u>Algebra I</u>

  • Function Notation

Step-by-step explanation:

<u>Step 1: Define</u>

f(x) = 4(x - 3)

f(9) is x = 9

<u>Step 2: Evaluate</u>

  1. Substitute in <em>x</em>:                    f(9) = 4(9 - 3)
  2. Subtract:                              f(9) = 4(6)
  3. Multiply:                               f(9) = 24
4 0
3 years ago
Other questions:
  • A city stadium has 7,128 seats. The city wants to add 1,694 seats to the stadium. The stadium will now hold blank seats.
    9·1 answer
  • Find the average rate of change of f(x) = 3(2)* between x = 1 and x = 4<br>​
    14·1 answer
  • Jeff and Jemaine go to an indoor ice skating ring. Jeff has to rent skates at $3.50 a pair while Jermaine has brought her own sk
    14·1 answer
  • HElP |if the radius of a sphere is 12.5 mm, then what is its volume in ml?​
    13·1 answer
  • A team of runners is needed ti run 1/4- mile relay race.if each runner must run 1/16 mile,how many runners will be needed
    10·2 answers
  • (I NEED HELP ASAP) In a class, there are 25 boys and 15 girls. If a student is selected at random, what is the probability that
    15·1 answer
  • At most, Kyle can spend $60 on sandwiches and chips for a picnic. He already bought chips for $10 and will buy sandwiches that c
    6·2 answers
  • Write an equation to match each graph:please help me?<br><br>​
    15·2 answers
  • Question 5 Jing will spin the spinner below 100 times. How many times do you expect it will land on B? СВ A A СА​
    9·1 answer
  • What is the answer??? so confused
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!