weeklymagazineowyldu weeklymagazineowyldu
  • 11-05-2018
  • Mathematics
contestada

I need the answer ASAP!!

At Joe's Market, three oranges and one apple cost $1.86, and two oranges and three apples cost $2.15. What is the cost of one apple?

Respuesta :

adincheang adincheang
  • 11-05-2018
o=orange
a=apple

equation 1
3o+a=$1.86
a=$1.86-3o

use a=$1.86-3o in equation 2

equation 2 
2o+3a=$2.15
2o+3($1.86-3o)=$2.15
2o+$5.58-9o=$2.15
$5.58-7o=$2.15
$5.58=$2.15+7o
$3.43=7o
$0.49=o

then use $0.49=o for equation 1.

equation 1

3($0.49)+a=$1.86
$1.47+a=$1.86
a=$0.39

so an apple is $0.39.

Answer Link

Otras preguntas

Can some one help me with this how many kilograms is this ??? Really need help
How deep can we go into Earth's interior?
A car advertisement states that a certain car can accelerate from rest to 70km/h in 7 seconds. Find the car’s acceleration in m/s.
How does thermal energy heat a house? What devices and systems are involved?
A lizard accelerates from 2 m/s to 10m/s in 4 seconds. What is the lizard’s acceleration?
What do all viruses need to reproduce?
What is the acceleration of a 10 kg mass pushed by a 5 N force?
The planet Mercury measures 4,879 kilometers from one side to the other. Earth measures 12,756 kilometers from one side to the other. What is the difference b
someone help me with this ..
The position of a place north or south of the equator is measured in ?