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2 years ago

Anyone got the RIGHT answer to this? Make x the subject of: h = 4 ( x + 3y ) + 2

Mathematics

1 answer:

mixas84 [53]2 years ago

8 0

Answer:

$x=\frac{1}{4}h-\frac{1}{2} -3y$

Step-by-step explanation:

$h = 4 ( x + 3y ) + 2$

$h-2=4(x+3y)$

$4(x+3y)=h-2$

$x+3y=\frac{h-2}{4}$

$x=\frac{h-2}{4}-3y$

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A jar contains 133. A bigger jar contains 1 2/7 times as many pennies.what is the value of the pennies in the bigger jar

adoni [48]

A jar contains 133 pennies....a bigger jar contains 1 2/7 times as much

so the bigger jar contains :
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9/7 * 133 =
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2 years ago

B) The number of volume of a cylinder is half of its number of the total surface area.

faust18 [17]

Answer:

$V=179.6cm^3$

Step-by-step explanation:

the volume of a cylinder is given by:

$V=\pi r^2h$

where r is the radius and h is the height.

and the surface area:

$SA=2\pi r^2+2\pi rh$

the first term is the area of the circles and the second term is the area of the body.

since "The number of volume of a cylinder is half of its number of the total surface area." we will have that:

$V=\frac{1}{2}SA$

substitutig the equivalent expressions on each side:

$\pi r^2 h = \frac{1}{2} (2\pi r^2+2\pi r h)$

and we simplify and solve for the height (since is the value we don't know of the cylinder):

$\pi r^2 h = \pi r^2+\pi r h\\\pi r^2h-\pi rh=\pi r^2\\h(\pi r^2-\pi r)=\pi r^2\\h=\pi r^2/(\pi r^2-\pi r)$

we substitute the value of the radius $r=7cm$ , and we get:

$h=\pi (7cm)^2/(\pi (7cm)^2-\pi (7cm))\\h=153.938/(153.938-21.991)\\h=153.938/131.947\\h=1.1666cm$

thus the volume is:

$V=\pi r^2h$

$V=\pi (7cm)^2(1.1666cm)\\V=179.6cm^3$

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Answer:

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