12ab = 4 solve for a

Mathematics

2 answers:

WITCHER [35]3 years ago

8 0

Answer:

-3

Step-by-step explanation:

Levart [38]3 years ago

6 0

12ab=4
ab=4/12
ab=.3
a=.3/b

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How do you find area and perimeter of a rectangle with the side lengths of 5x^2 and 12x?

valentinak56 [21]

Answer:

The area can be found by multiplying the two terms, and the perimeter by doubling and adding them.

Using this, we find that the area of the rectangle is 60x³, and the perimeter is 10x² + 24x.

Step-by-step explanation:

First let's find the area:

5x² × 12x

= 60x³

Now the perimeter:

2(5x² + 12x)

= 10x² + 24x

8 0

3 years ago

Using the Law of Cosines, in triangle DEF, if e=18yd, d=10yd, f=22yd, find measurement of angle D

Ivahew [28]

Check the picture below.

$\bf \textit{Law of Cosines}\\ \quad \\
c^2 = {{ a}}^2+{{ b}}^2-(2{{ a}}{{ b}})cos(C)\implies 
c = \sqrt{{{ a}}^2+{{ b}}^2-(2{{ a}}{{ b}})cos(C)}
\\\\\\
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-------------------------------\\\\
\begin{cases}
d=10\\
e=18\\
f=22
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$\bf \implies cos^{-1}\left(0.893\overline{93}\right)=\measuredangle D\implies 26.63^o\approx \measuredangle D$