Answer:
5 units
Step-by-step explanation:
If you look at AC that has 4 units and DE is close to 4 units but a little bigger by a unit
2(5x^2+2x)+2(3x^2)
10x^2+4x+6x^2
16x^2+4x
D is the correct answer.
Answer: Choice B
12.5 < x < 18.9
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Explanation:
We have a triangle with these side lengths:
- a = 10
- b = 16
- c = x = unknown
Let's assume that b = 16 is the largest side of this triangle.
By the converse of the pythagorean theorem, we need
to be true in order for an acute triangle to happen.
So,
![b^2 < a^2 + c^2\\\\c^2 > b^2 - a^2\\\\c > \sqrt{b^2-a^2}\\\\x > \sqrt{16^2-10^2}\\\\x > \sqrt{156}\\\\x > 12.4899959967968 \ \text{(approximate)}\\\\x > 12.5](https://tex.z-dn.net/?f=b%5E2%20%3C%20a%5E2%20%2B%20c%5E2%5C%5C%5C%5Cc%5E2%20%3E%20b%5E2%20-%20a%5E2%5C%5C%5C%5Cc%20%3E%20%5Csqrt%7Bb%5E2-a%5E2%7D%5C%5C%5C%5Cx%20%3E%20%5Csqrt%7B16%5E2-10%5E2%7D%5C%5C%5C%5Cx%20%3E%20%5Csqrt%7B156%7D%5C%5C%5C%5Cx%20%3E%2012.4899959967968%20%5C%20%5Ctext%7B%28approximate%29%7D%5C%5C%5C%5Cx%20%3E%2012.5)
Now let's consider the possibility that the missing side x is actually the longest side.
Using the same theorem as before, we would say,
![c^2 < a^2 + b^2\\\\c < \sqrt{a^2 + b^2}\\\\x < \sqrt{10^2 + 16^2}\\\\x < \sqrt{356}\\\\x < 18.8679622641132 \ \text{(approximate)}\\\\x < 18.9\\\\](https://tex.z-dn.net/?f=c%5E2%20%3C%20a%5E2%20%2B%20b%5E2%5C%5C%5C%5Cc%20%3C%20%5Csqrt%7Ba%5E2%20%2B%20b%5E2%7D%5C%5C%5C%5Cx%20%3C%20%5Csqrt%7B10%5E2%20%2B%2016%5E2%7D%5C%5C%5C%5Cx%20%3C%20%5Csqrt%7B356%7D%5C%5C%5C%5Cx%20%3C%2018.8679622641132%20%5C%20%5Ctext%7B%28approximate%29%7D%5C%5C%5C%5Cx%20%3C%2018.9%5C%5C%5C%5C)
We found that x > 12.5 and x < 18.9
This is the same as saying 12.5 < x and x < 18.9
Put together, they form the approximate answer of 12.5 < x < 18.9
Answer: 32/20 or 8/5
Step-by-step explanation: Turn 7/5 into 28/20. Do 28/20 plus 4/20. That equals 32/20 or 8/5.
Answer:
196 miles
Step-by-step explanation:
if he goes 140 miles with 5 gallons, each gallon lets him go 28 miles.
140miles/5gallons=28miles/1gallon
then 7 gallons lets you go 196 miles
brainliest please :)