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nataly862011 [7]
3 years ago
8

Evaluate x+2.7 for x=-1.5

Mathematics
1 answer:
kramer3 years ago
5 0

Answer:

x = 1.2

Step-by-step explanation:

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Step-by-step explanation:

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What is the solution set of the equation 30/x^2-9 +1=5/x-3
gizmo_the_mogwai [7]
\frac{30}{x^{2} - 9 + 1} = \frac{5}{x - 3} \\\frac{30}{x^{2} - 8} = \frac{5}{x - 3} \\5(x^{2} - 8) = 30(x - 3) \\5(x^{2}) - 5(8) = 30(x) - 30(3) \\5x^{2} - 40 = 30x - 90 \\5x^{2} + 50 = 30x \\5x^{2} - 30x + 50 = 0 \\5(x^{2}) - 5(6x) + 5(10) = 0 \\5(x^{2} - 6x + 10) = 0 \\\frac{5(x^{2} - 6x + 10)}{5} = \frac{0}{5} \\x^{2} - 6x + 10 = 0 \\x = \frac{-(-6) \± \sqrt{(-6)^{2} - 4(1)(10)}}{2(1)} \\x = \frac{6 \± \sqrt{36 - 40}}{2} \\x = \frac{6 \± \sqrt{-4}}{2} \\x = \frac{6 \± 2i}{2} \\x = 3 \± i \\x = 3 + i\ or\ x = 3 - i

The answer is D.
8 0
3 years ago
Read 2 more answers
4. The volume of a spherical balloon with a radius of 3.1 cm is about 125 cm3. Estimate the volume of a
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1,000cm

Step-by-step explanation:

I just did the practice. I got it right.

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