Answer:
so basically you can take more than one trip you can take the mother and the bag at the same time
Step-by-step explanation:
and then you can get the daughter in the son at the same time and then for the final trip you take the father by himself
X + 3y = 14
x + 3(3x - 14) = 14
x + 9x - 42 = 14
10x - 42 = 14
<u> + 42 + 42</u>
<u>10x</u> = <u>56</u>
10 10
x = 5.6
5.6 + 3y = 14
<u>- 5.6 - 5.6</u>
<u>3y</u> = <u>8.4</u>
3 3
y = 2.7
(x, y) = (2.7, 5.6)
SA= 2LW + 2LH + 2WH
Substituting for the values, SA = 900 cm^2
Using a calculator to divide 15/14, it is 1.071428571.
Depending on how many decimal places you want it rounded to, that would be 1.071.
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