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photoshop1234 [79]
3 years ago
15

A stranded soldier shoot a signal flare into the air to attract the attention of a nearby plan. The flare has an initial velocit

y of 1500 feet per second. Its height is defined by the quadratic function below. Assume that the flare is fired from ground level.
Mathematics
1 answer:
Zolol [24]3 years ago
6 0
What is the equation? 
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What is the minimum value of F(x)= 10x^{2} -6x-3<br> 3/10 or -39/10
kolezko [41]

Answer: 3/10

Step-by-step explanation:

Take the derivative of 10x^2-6x-3 to get 20x-6. Set that equal to 0 to find the critical points of the function. The critical points is when the slope is either 0 or undefined.

Now do:

20x-6=0\\20x=6\\x=\frac{6}{20} = \frac{3}{10}

There are quite a few more steps to actually find the minimum, but for this example you can automatically assume its a minimum because it is the only critical point of the function. Ill show you these extra steps tho.

Plug in two numbers into the derivative. One that is less than 3/10 and one that is greater than 3/10. The numbers 0 and 1 are fine. When x = 0, the function is -6. When x = 1, the function is +14. A switch from negative to positive indicates a minimum value

6 0
3 years ago
Jane paid $35 for her meal. If the cost of the meal was $30 , what was the tax rate.
marta [7]
5 dollars because she paid 30 for the meal
6 0
3 years ago
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Rewrite 24.5 as a mixed number in lowest terms.<br> 5 6/25 . 5 24/100. 24 5/10. 24 1/2
Pavlova-9 [17]

Answer: 24 1/2

Step-by-step explanation: hope this helps

7 0
3 years ago
12 M cubed minus 22 M squared minus 70 m
Andru [333]
I'm guessing you needed this factored and apologies for the lateness, this popped up after I answered another question. 

12m³ - 22m² - 70m

2m(6m² - 11m - 35)
2m(6m² + 10m - 21m - 35)
2m(2m(3m + 5) - 7(3m + 5))

Your factored answer is:

2m(2m - 7)(3m + 5)
3 0
4 years ago
Noah says to find 20% of a number he divides the number by 5. Does Noah method always work?
Tatiana [17]

Answer:

Yes because 20 percent of anything, including 0, multiplied by 5 is 100 percent

Step-by-step explanation:

5 0
4 years ago
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