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
MaRussiya [10]
3 years ago
10

4. El costo de impresión de cada página en una biblioteca es de 5 centavos si es en blanco y negro o

Mathematics
1 answer:
ira [324]3 years ago
4 0

Answer:

Juan imprimió 7 páginas a color.

Step-by-step explanation:

Llamemos "b" a las copias en blanco y negro y "c" a las copias en color.

Juan imprimió 75 páginas. En forma simbólica es:

b + c = 75  

b = 75 - c   [1]

El costo de impresión de cada página en una biblioteca es de 5 centavos si es en blanco y negro o  50 centavos si es a color. En total pago $6.90. En forma simbólica es:

0.05b + 0.5c = 6.90   [2]

Si reemplazamos [1] en [2],

0.05(75-c) + 0.5c = 6.90

3.75 - 0.05c + 0.5c = 6.90

0.45c = 3.15

c = 7

Juan imprimió 7 páginas a color.

You might be interested in
Pls help meeeee
Rashid [163]

Answer:

6 gallons of gas

Step-by-step explanation:

20.00 - 2.12 = 17.88

17.88 divided by 2.98 equals 6

8 0
2 years ago
Read 2 more answers
Mallorie has $5 in her wallet.if this is 10% of her monthly allowance what is her monthly allowance
marta [7]
5=.1*x
divide both side by .1
5/.1=x
x=50 dollars
4 0
3 years ago
Read 2 more answers
What is decrease £20 by 15%
Charra [1.4K]
15\%\cdot\pounds20=0.15\cdot\pounds20=\pounds3\\
\pounds20-\pounds3=\pounds17
3 0
3 years ago
Read 2 more answers
A car starts at rest and accelerates for 8 s at a rate of 3 m/s ^ 2 What is the final velocity of the car?
Bumek [7]
8m/2.6. Wisehehehbehehehdhudur
7 0
3 years ago
Given the equation -2x + 8y = 24, determine the x- and y-intercepts. PLZ HELP???
attashe74 [19]

Answer:

x=(-12,0)

y=(0,3)

Step-by-step explanation:

<u><em>x-intercept</em></u>

-2(x-4y)=24

x-4y=-\frac{24}{2}

x-4y=-12

x=4y-12

x=4(0)-12

x=-12

<u><em>y-intercept </em></u>

-2(x-4y)=24

x-4y=-\frac{24}{2}

x-4y=-12

-4y=-12-x

y=-\frac{-12-x}{4}

y=-\frac{-12-(0)}{4}

y=\frac{12}{4}

y=3

5 0
3 years ago
Other questions:
  • Write this trinomial in factored form. 3b^2+b-14​
    14·1 answer
  • Find the measures of the angles in the figure.
    14·2 answers
  • What is 119,000,003 in expanded form
    15·1 answer
  • What is ​ <br> 17<br> 5<br><br> ​ as a mixed number in simplest form?
    15·2 answers
  • Given m||n, find the value of x.<br> (4x-18)<br> (3x-8)°
    13·1 answer
  • Determine a and b so that figure ABCD is a parallelogram
    15·1 answer
  • Please help please help
    10·1 answer
  • Someone help me using the diagram below!
    7·1 answer
  • A number is divisible by 2 if it can be divided by 2 without a remainder. Even numbers are divisible by 2 what is the greatest t
    12·1 answer
  • the city of luckett is pilling rock salt for use during ice storms. if the pile from last year is 29 feet high and 14 feet are a
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!