I need help am i correct

Mathematics

2 answers:

Paraphin [41]4 years ago

8 0

The error you made was 13x65=75

nirvana33 [79]4 years ago

6 0

13 x 5 = 65

4 x 7 = 28

28 + 65 = 93

Your error is in you said 13 x 65 is 75

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Find the center-radius form of the equation of the circle described.

Kitty [74]

Answer:

Correct answer: (x-√2)² + (y-√5)² = 3

Step-by-step explanation:

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( x-p )² + ( y-q )² = r²

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God is with you!!!

8 0

3 years ago

5/3 × 20 must show work

Romashka [77]

Answer:

$5/3*20$

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Step-by-step explanation:

5 0

3 years ago

Please help!!

yarga [219]

Because this is a fourth degree that will be tricky to factor as it is, we will do a u substitution. Let $x^2=u$ . We can now rewrite that polynomial in terms of u: $u^2-7u-8=0$ . Filling into the quadratic formula we have $u=\frac{7+/-\sqrt{49-4(1)(-8)}}{2}$ . Simplifying down $u=\frac{7+/-\sqrt{81}}{2}$ and $u=\frac{7+9}{2}$ or $u=\frac{7-9}{2}$ . That means that u = 8 or u = -1. But don't forget that we let $u=x^2$ , so we have to put x-squared back in for u. That gives us $x^2=8$ which simplifies down to $+/-2\sqrt{2}$ . That also gives us $x^2=-1$ . When we take the square root of -1, we have to use the fact that -1 = i^2, so we sub that in to get $x=+/-i$ . All in all, your solutions are as follows: $2\sqrt{2},-2\sqrt{2},i,-i$ which is choice b.