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2 years ago

Evaluate the following expression for a = 12 and b = 4 2a/2b

Mathematics

1 answer:

Schach [20]2 years ago

7 0

Answer:

Step-by-step explanation:

1. Substitute 12 for a and 4 for b in the equation: (2(12)) / (2(4))

2. Multiply: 24/8 = 3

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viktelen [127]

Answer:

y=-1/4x-6

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3 years ago

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PLEASE HELP!!

IRISSAK [1]

Step-by-step explanation:

$a + b = 6$

$ab = 1 \times 5 = 5$

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3 years ago

Today only, a desk is being sold at a 29% discount. The sale price is $213.

blondinia [14]

Answer:

$274.77

Step-by-step explanation:

213.00 ÷29 =61.769999 then add 213.00 plus 61.76

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2 years ago

Find the surface area of the part of the sphere x2+y2+z2=81 that lies above the cone z=x2+y2−−−−−−√

TiliK225 [7]

Parameterize the part of the sphere by

$\mathbf s(u,v)=(9\cos u\sin v,9\sin u\sin v,9\cos v)$

with $0\le u\le2\pi$ and $0\le v\le\dfrac\pi4$ . Then

$\mathrm dS=\|\mathbf s_u\times\mathbf s_v\|=81\sin v\,\mathrm du\,\mathrm dv$

So the area of $S$ (the part of the sphere above the cone) is given by

$\displaystyle\iint_S\mathrm dS=81\int_{v=0}^{v=\pi/4}\int_{u=0}^{u=2\pi}\sin v\,\mathrm du\,\mathrm dv=81(2\pi)\left(1-\dfrac1{\sqrt2}\right)=(162-81\sqrt2)\pi$

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3 years ago

Seven times the sum of a number and 8 equals 4

gayaneshka [121]

Answer:

n= -52/7

Step-by-step explanation:

7(n+8)=4

(7×n)+ (7×8)=4

7n +56=4

7n +56-56=4-56

7n+0= -52

7n=-52

7n/7= -52/7

n= -52/7

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2 years ago

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