calvinhb03 calvinhb03
  • 24-10-2021
  • Mathematics
contestada

a textbook store sold a combined total of 348 history and chemistry text in week.The number of history textbooks sold was three times the number of chemistry books were sold. how many book of each type were sold.

Respuesta :

PowerfulTree PowerfulTree
  • 24-10-2021

Answer:

x=87, y=261

Step-by-step explanation:

x+y=348 and 3x=y

plug 3x in for y.  

x+(3x)=348

4x=348

x=87

plug x in to solve for y.

3(87)=y

y=261

Answer Link

Otras preguntas

what statement about Christianity is true?
The internal kinetic energy of molecules produces ...?
The size S of a tumor in mm cubed is given by S=2^t, where t is the number of months since the tumor was discovered a: what is the total change in the size of t
The velocity v of the flow of blood at a distance "r" from the central axis of an artery of radius "R" is: v = k(R^2^ - r^2^) where k is the constant of propo
3 to the 4 power times 3 negative 7 what is the product in positive exponents
find the limit as x approaches 0 of x/sin3x
7.2 x 10 to the 6th power
How do you express 5/8 as a decimal?
Endurance Training increases the ability to sustain high quality athletic ability over time. The four components of endurance training are aerobic endurance, an
Can centripetal force ever do work on an object? ...?