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ValentinkaMS [17]
3 years ago
5

Hey can I have help?

Mathematics
2 answers:
Alinara [238K]3 years ago
7 0
Should be -24 or 24
8x-3 equals -24. Your correct answer is -24
777dan777 [17]3 years ago
6 0

Answer: It eroded 24cm in 8 years.

Step-by-step explanation:

3cm/ 1yr

xcm / 8yr

8 * 3 = 24

24cm / 8yr

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Given the position of the particle, what the position(s) of the particle when it’s at rest
choli [55]

The position function of a particle is given by:

X\mleft(t\mright)=\frac{2}{3}t^3-\frac{9}{2}t^2-18t

The velocity function is the derivative of the position:

\begin{gathered} V(t)=\frac{2}{3}(3t^2)-\frac{9}{2}(2t)-18 \\ \text{Simplifying:} \\ V(t)=2t^2-9t-18 \end{gathered}

The particle will be at rest when the velocity is 0, thus we solve the equation:

2t^2-9t-18=0

The coefficients of this equation are: a = 2, b = -9, c = -18

Solve by using the formula:

t=\frac{-b\pm\sqrt[]{b^2-4ac}}{2a}

Substituting:

\begin{gathered} t=\frac{9\pm\sqrt[]{81-4(2)(-18)}}{2(2)} \\ t=\frac{9\pm\sqrt[]{81+144}}{4} \\ t=\frac{9\pm\sqrt[]{225}}{4} \\ t=\frac{9\pm15}{4} \end{gathered}

We have two possible answers:

\begin{gathered} t=\frac{9+15}{4}=6 \\ t=\frac{9-15}{4}=-\frac{3}{2} \end{gathered}

We only accept the positive answer because the time cannot be negative.

Now calculate the position for t = 6:

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6 0
1 year ago
Students are comparing their heights jose is 4 1/6 feet tall lee is 4 1/4 feet tall judi is 4 1/12 feet tall and sammy is 4 2/3
klemol [59]
Sammy is the tallest one because he is 4.667 feet tall
6 0
3 years ago
Read 2 more answers
Graph the inequality x -2y <8
Jet001 [13]
Here you go: 
Hope this helped.

6 0
3 years ago
The price of jeans was reduced $6 per week for 7 weeks. By how much did the price of the jeans change over the 7 weeks?
Sedbober [7]
The price dropped by forty two dollars. We can work this out by simply multiplying six, the number that we know the jeans were reduced by each week, by seven, the number of weeks that the jeans continued to reduce in price for. Six times seven is of course forty two.
6 0
3 years ago
2,617 rounded to the nearest ten
r-ruslan [8.4K]

Answer:

2,620.

Step-by-step explanation:

thats the answer. have a nice day!

8 0
3 years ago
Read 2 more answers
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