A sand dune stands 5 feet above sea level. The hill is eroding at a rate of 1 foot per 20 years. Let y represent the height of t he sand dune after x years. Which equation represents the situation?
2 answers:
Answer:
y=-1/20x+5
Step-by-step explanation:
The situation will be represented by linear equation, this is given by:
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.93 is far greater than the rest.
Answer:
x≥ -4/55, x≤−89
Step-by-step explanation:
Step 1: Subtract 1 from both sides.
−110x+1−1≤9−1
−110x≤8
Step 2: Divide both sides by -110.
−110x/-110≤8/-110
x≥ -4/55
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Answer:
Translation of 1 unit left and 7 units up.
Solution:
A (3, -4) ~ A’ (2, 3)
Translation = 1 unit left and 7 units up.
Answer:
Step-by-step explanation:
Let x = the number of $20 bills.
Then x + 6 = the number of $5 bills and
20x + 5(x + 6) = 455
x = 17 = number of $20 bills
x + 6 = 17 + 6 = 23 = number of $5 bills
Check:
OK.
