The equation must equal 84, so you can eliminate B and D.
Chin charges a rate for 2 hours, then charges a reduced rate for 4 hours. There are no discounts present in his rate, so you can eliminate A.
The equation for Chin's charges can be found by the equation C. 2x + 4y = 84.
X=2
El mejor programa para que te ayuda es Math,
way
1 trillion can be written as 1,000,000,000,000
1 billion can be written as 1,000,000,000
There are 3 more 0’s in 1 trillion than there are in 1 billion, so therefore 1 trillion is 1,000 times greater than 1 billion.
If you have any further questions feel free to ask.
Hope this helps
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