funnypaige
funnypaige
22-05-2017
Mathematics
contestada
What's the answer on number 11
Respuesta :
mjankiewicz
mjankiewicz
22-05-2017
2x-y=7
2x+7y=31 |* (-1)
===
2x - y = 7
-2x-7y=-31
===
-y-7y=-24
-8y=-24 |:(-8)
y=3
2x-y=7
2x-3=7 |+3
2x=10 |:2
x=5
x=5
y=3
Answer Link
VER TODAS LAS RESPUESTAS ( 13+ )
Otras preguntas
what positive integer must be included in the set(1, 2 , 4 , 8) so that the new set of five integers have a median that is equal to its mean
When specialized cells are grouped together to form a common function, what they are called? an organism an ecosystem a community tissue
What type of bond is shown below, where electrons are shared between the bonded atoms? A) covalent bond B) ionic bond Eliminate C) hydrogen bond D) cellular bon
Cellular respiration uses 1 molecule of glucose to produce approximately a. 36 ATP molecules. b. 32 ATP molecules. c. 2 ATP molecules. d. 4 ATP molecules.
What statement best defines a universal law A. it is in effect at all times B. It operates only under specific conditions C. It is in effect some of the time D.
DNA from one species differs from the DNA of another species in its a)base ratios b)sugars c)phosphate groups d)all of the above
What sparked off Shays's Rebellion?
If log 6=a, then log 600= ?
When you take a deep breath before diving underwater, air is forced into your lungs by the contraction of your.. -alveoli -lungs -diaphragm -heart
You calculate the ___of a machine by dividing its __ by its work input and multiplying by 100 CHOICES work work output efficiency
