Step-by-step explanation:
let's look at the full numbers under the square roots when bringing the external factors back in :
sqrt(9×9×2) - sqrt(3×3×7) + sqrt(8) - sqrt(28)
and let's present these numbers as the product of their basic prime factors
sqrt(3×3×3×3×2) - sqrt(3×3×7) + sqrt(2×2×2) - sqrt(2×2×7)
now we see that we have 2 pairs of square roots : 1 pair ends with a factor of 2, and one pair with a factor of 7.
let's combine these
sqrt (3×3×3×3×2) + sqrt(2×2×2) - sqrt(3×3×7) - sqrt (2×2×7)
and now we move the factors of 2 and 7 back out in front (of course, we need to apply the square root on these factors) :
9×sqrt(2) + 2×sqrt(2) - 3×sqrt(7) - 2×sqrt(7) =
= (9+2)×sqrt(2) - (3+2)×sqrt(7) = 11×sqrt(2) - 5×sqrt(7)
and that is the first answer option.
Both are horizontal, both are parallel to the x-axis, both are below the x-axis.These were just visual comparisons, which may not be what you need. I found this on yahoo.
1, -0.2, -0.3
<span>2, -0.1, -0.15 </span>
<span>3, -0.0667, -0.1 </span>
<span>4, -0.05, -0.075 </span>
<span>5, -0.04, -0.06 </span>
<span>6, -0.0333, -0.05 </span>
<span>7, -0.0286, -0.0429 </span>
<span>8, -0.025, -0.0375 </span>
<span>9, -0.0222, -0.0333 </span>
<span>10, -0.02, -0.03
</span> An easy way to compare multiple graphs is to graph them in a graphing calculator at the same time. If you don't have a graphing calculator, Desmos is a great option!
Answer:
Approximately 1.964 gallons per hour
Step-by-step explanation:
See image
X= -156 that is the real answer
