Answer:
Step-by-step explanation:
x + y = 25 ...........................(1)
{4x + 2y =64} / 2 divide the equation by 2
2x + y = 32 ........................(3)
Step Two
subtract (1) from (3)
2x + y = 32
x + y = 25
x = 7
Therefore from equation 1 we get x + y = 25
but x = 7
7 + y = 25 Subtract 7 from both sides.
y = 25 - 7
y = 18
Check
4*x + 2*y = 64
4*7 + 2*18 =? 64
28 + 36 = ? 64
64 = 64
The checks out to be the right answer.
Answer: = 62.8 pounds of CO₂
Step-by-step explanation:
1 kilowatt per hour produces 0.99 pounds of C02.
The total wattage in hours used was;
= 7,043 * 9 hours
= 63,387 watts
In kilowatts;
= 63,387/1000
= 63.387 kilowatts
CO2 produced;
= 63.387 * 0.99
= 62.75313
= 62.8 pounds of CO2
Answer:
Step-by-step explanation:
part A:
okay so you saved $300 and choose to spend $50 a week
the 300 is positive and is the y-intercept since thats the amount of money you start with
and the 50 is negative because that is being spent and is the slope
so the equation is:
y = -50x + 300
part B:
the graph will be on the bottom
the (6, 0), aka the x-intercept, shows that in 6 weeks you will be out of money
the (0, 300), aka the y-intercept, shows that in the beginning of summer you have $300
part C:
the y-intercept is 300; it represents the amount of money you have in the beginning of the summer
All I know is the equation is y=12+.75x