Mathematics's questions - English iziqna

Best answer: (a + 1/a) = 10 (a + 1/a)^2 = 10^2 a^2 + 2 * a * (1/a) + 1/a^2 = 100 a^2 + 2 * 1 + 1/a^2 = 100 a^2 + 1/a^2 = 100 - 2 a^2 + 1/a^2 = 98 Or we could solve for a to begin with and work from there a + 1/a = 10 a^2 + 1 = 10a a^2 - 10a = -1 a^2 - 10a + 25 = 25 - 1 (a - 5)^2 = 24 a - 5 = +/- 2 * sqrt(6) a = 5 +/- 2 *... show more

Math..........?

5 answers · 13 hours ago

Help with hypotenuse?

8 answers · 2 days ago
How can I find h in this picture?

20/24 +5/8=?

17 answers · 3 days ago

Length of door itself: 143.5cm Width of door itself: 68.5cm Finding: Angle that the door needs to be on to fit into the doorway. (the door will be a parallelogram)



Math Help?

10 answers · 2 days ago
Best answer: C 119.99 + ((230 - 100) X 0.31) 119.99 + 40.30 = 160.29

How do I integrate ∫dx/(8+3x)?

9 answers · 1 day ago
How do I integrate ∫(dx/(8+3x)) I have a general idea, u-substitution... My final answer gets pretty close, but isn't exact to the right answer. Someone people help me a (desperate student)!!! thanks, much appreciated!


2√(x+2) -√(x-3) =√(x+9)


Solve 0.5e^0.92t=0?

7 answers · 15 hours ago
Best answer: Solve 0.5e^0.92t=0? I doubt it. ~Peanuts2345

HOW MUCH IN 78 ROLLS OF QUARTERS?

7 answers · 19 hours ago

What fraction of an inch .185?

11 answers · 3 days ago

Evaluate the following function?

5 answers · 4 days ago
Evaluate the following function at the values t + 2 and t + h. g(t) = 3t^3 - 7t g(t+2)=? g(t+h)=?

Math Question:?

6 answers · 21 hours ago
Best answer: (a) (see graph below) ---------------------------------- (b) Solve for 7^2x − 4(7^x) + 3 = 0 7²ˣ − 4(7ˣ) + 3 = 0.............[1] // Let u = 7ˣ and rewrite [1] in terms of u // and solve for u u² - 4u + 3 = 0 .....(u-3)(u-1) = 0 .....u = 3, 1 // Now back-substitute u = 7ˣ and solve for x When u = 3, .....3 =... show more

Best answer: Multiply the diameter of the circle by 22/7 to get the circumference of the circle.The formula is 2*22/7 *radius of the circle.

Best answer: Just square it to see: x = 3√5 - 2√2 x² = (3√5 - 2√2)(3√5 - 2√2) x² = (3√5)² - 2(3√5)(2√2) + (2√2)² x² = 9*5 - 12√10 + 4*2 x² = 45 - 12√10 + 8 x² = 53 - 12√10


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