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Thepotemich [5.8K]
4 years ago
14

The sum of three numbers is 132 . the third number is 7 less than the first. the second number is 3 times the third. what are th

e numbers?
Mathematics
1 answer:
katovenus [111]4 years ago
8 0
X+y+z = 132
x = 7+z
y = 3z

(7+z)+3z+z = 132
5z = 132-7
z = 125/5

z = 25 <=====

x = 7+z
x = 7 + 25
x = 39 <=====

y = 3z
y = 3 × 25
y = 75 <=====

hope it helps :)

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Determine the area of a parallelogram if<br> its base is 16 cm and its height is 7 cm.
ella [17]
<h3>Answer: 112 square cm</h3>

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Work Shown:

area = base*height

area = 16*7

area = 112 square cm

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Extra info (optional section):

The area formula for a parallelogram is the same as the formula for a rectangle. Imagine tilting a rectangle so that it's slanted. The area has not changed.

Or another thing to imagine is that let's say we had a stack of 2 by 4s. If the stack is perfectly vertical, aka forming a rectangle, then we can nudge the beams so that we can form a slanted parallelogram instead. Both configurations involve the same amount of wood, and therefore would lead to the same frontal surface area.

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Why resultant magnitude by using Pythagorean theorem is different than using ( x,y )components addition vectors ???
Andreyy89

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Explanation:

Your different answers came about as a result of an error you made in the Pythagorean theorem calculation.

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1. A boat is 18 ft away from a point perpendicular to the shoreline. A person stands at a point down the shoreline so that a 68°
slega [8]

Answer:

19.4 feet

Step-by-step explanation:

When calculating distances using perpendicular angles, we use trig functions such as Sin, Cos, and Tan.

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Because our angle and know side value are across from each other and we need to know the hypotenuse, we chose to use Sine.

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We isolate h by multiplying h across the equal sign and dividing sin (68) across as well. sin (68) = \frac{18}{h}\\hsin (68) = \frac{18}{h}*h\\hsin (68) = 18\\\frac{hsin (68)}{sin (68)} =\frac{18}{sin (68)} \\

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Answer:

Step-by-step explanation:

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