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3 years ago

Help its hard math and i need help now

Mathematics

2 answers:

gregori [183]3 years ago

7 0

Perimeter = 2L + 2W

Area = L x W

Rectangle A:

Perimeter = 2(6) + 2(8) = 12 + 16 = 28 cm

Area = 6 * 8 = 48 cm^2

Rectangle B:

Perimeter = 2(4) + 2(12) = 8 + 24 = 32 cm

Area = 4 x 12 = 48 cm^2

suter [353]3 years ago

3 0

Answer:

A) 2(8+6)

2(14)

B) 2(12+4)

2(16)

C) 6*8

D) 12*4

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Find the exact roots of x²-2x-10=4x

BARSIC [14]

Answer:

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Step-by-step explanation:

The given equation is

${x}^{2} - 2x - 10 = 4x$

We group the linear terms to get:

${x}^{2} - 2x - 4x - 10 = 0$

${x}^{2} - 6x - 10 = 0$

We compare to

$a {x}^{2} + bx + c = 0$

This means

a=1, b=-6 and c=-10

We plug in the values into the quadratic formula:

$x = \frac{ - b \pm \sqrt{ {b}^{2} - 4ac} }{2a}$

This gives us

$x = \frac{ - -6 \pm \sqrt{ {( - 6)}^{2} - 4 \times 1 \times - 10 } }{2 \times 1}$

$x = \frac{ 6 \pm \sqrt{ 36 + 40 } }{2}$

$x = \frac{ 6 \pm \sqrt{76 } }{2}$

$x = \frac{ - 6 \pm 2\sqrt{19} }{2}$

$x = 3 \pm \sqrt{19}$

The solutions are

$x =3 + \sqrt{19}$

$x = 3 - \sqrt{19}$

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Answer:

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Https://us-static.z-dn.net/files/db5/3b4bed3bf73da55d58a77a133114bfca.jpeg

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