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3 years ago

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3x2 = 81 b. (x - 1)(x + 1)-9 = 5x C. X - 9x + 10 = 32 d. 6x(x - 9) = 29

1 answer:

irakobra [83]3 years ago

6 0

Answer:

a. 3x^2 = 81

x^2 = 27

$x = 3\sqrt{3} or -3\sqrt{3}$

Step-by-step explanation:

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Sidana [21]

AE = AC = 4

m<CAB = 60 (equilateral triangle)
m<CAE = 90 (square)

m<BAE = 150 (= 60 + 90)

Triangle BAE is isosceles since AB = AE;
therefore, m<AEB = m<ABE.

m<AEB + m<ABE + m<BAE = 180

m<AEB + m< ABE + 150 = 180

m<AEB + m<AEB = 30

m<AEB = 15

In triangle ABE, we know AE = AB = 4;
we also know m<BAE = 150, and m<AEB = 15.

We can use the law of sines to find BE.

BE/(sin 150) = 4/(sin 15)

BE = (4 sin 150)/(sin 15)

BE = 7.727

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3 years ago

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Charra [1.4K]

[tex}r - 5 \frac{5}6 + 5\frac{5}6 = 10 +5\frac{5}6{/tex] $r=15 \frac{5}6$

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3 years ago

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Answer:

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Arturiano [62]

Answer:

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3 years ago

Tom bought a PS4 on Black Friday for 25% off. If the system sells for $399, what is the sales price of the PS4?

Delicious77 [7]

Answer:

The sales price of the PS4 is $532.

Step-by-step explanation:

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Then after giving 25% discount the price will become $x(1 - \frac{25}{100}) = 0.75x$

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3 years ago