Answer:3,-3
Step-by-step explanation:
begin by simplifing the expression. So, the 2 x's will cancel out in the expression. you should have 7=2x^2-11. Then Subtract the 7 from both sides so you cna use the quadratic formula. This gives you 2x^2-18=0. Using the formula {-b+/sqrt(b^2-4ac)}/2a this gives us {-0+/sqrt(0^2-4*2*-18)}/2*2 this simplifies to 0+/- 12 all over 4. +12/4=3 and -12/4=-3.
Answer:
21. y = 75000·0.935^t
22. after 74.6 days
23. y = 27.8112·1.18832^t
24. 18.8% per month
25. 1748
Step-by-step explanation:
22. It is convenient to use the graphing calculator to solve this problem. The number of days is where the exponential curve has the value 500. It is about 74.55 days. (see the first attachment)
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23. y = 27.8112·1.18832^t (see the second attachment)
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24. The rate of change is the difference between the base of the exponential and 1, often expressed as a percentage. The time period is the units of t.
(1.18832 -1) × 100% ≈ 18.8% . . . . per month
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25. Evaluating the function for t=24 gives y ≈ 1748.30425259 ≈ 1748.
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<em>Comment on graphing calculator</em>
A graphing calculator can make very short work of problems like these. It is worthwhile to get to know how to use one well.
Answer:
<h3>
<em><u>Point</u></em><em><u> </u></em><em><u>B</u></em><em><u>:</u></em><em><u> </u></em><em><u>(</u></em><em><u>_</u></em><em><u>1</u></em><em><u>1</u></em><em><u> </u></em><em><u>,</u></em><em><u> </u></em><em><u>7</u></em><em><u>)</u></em><em><u> </u></em></h3><h3>
<em><u>Point</u></em><em><u> </u></em><em><u>C:</u></em><em><u> </u></em><em><u>(</u></em><em><u>1</u></em><em><u>1</u></em><em><u>,</u></em><em><u> </u></em><em><u>-</u></em><em><u>7</u></em><em><u>)</u></em><em><u> </u></em></h3>
<em><u>CORRECT</u></em><em><u> </u></em><em><u>ME</u></em><em><u> </u></em><em><u>IF</u></em><em><u> </u></em><em><u>THERE'S</u></em><em><u> </u></em><em><u>WRONG</u></em><em><u>!</u></em><em><u> </u></em>
Answer:
x+6
Step-by-step explanation:
Hope this helped