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poizon [28]
3 years ago
7

an angle measures 78 degrees more than the measure of a complementary angle. What is the measure of each angle?

Mathematics
1 answer:
ArbitrLikvidat [17]3 years ago
4 0

X is one angle

X+78 is the second angle

Add them together

2x+78=90

Subtract 78 from both sides

2x=12

X=6

One angle is 6 the other angle is 84

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How do i Solve: 3x2−6x−12=0 ?
MrMuchimi

Answer:

1 + root 5, 1 - root 5

Step-by-step explanation:

I assume you mean 3x^2-6x-12=0.

First, note that you can divide both sides by 3. You get:

x^2-2x-4=0

Use the quadratic equation.

x=\frac{2\pm\sqrt{4+16}}{2}=\frac{2\pm2\sqrt{5}}{2}=1\pm\sqrt{5}

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4 0
3 years ago
Find the surface area of a pyramid with a square base with dimensions 100 mm by 100 mm and height of 75 mm.
Reil [10]

To solve for the surface area of the pyramid, we make use of the formula:

A= l w + l [sqrt ((w / 2)^2 + h^2)] + w [sqrt ((l / 2)^2 + h^2))

where,

l and w are the base of the pyramid = 100 mm

h is the height of the pyramid = 75 mm

 

Substituting the given values into the equation:

A= 100 * 100 + 100 [sqrt ((100 / 2)^2 + 75^2)] + 100 [sqrt ((100 / 2)^2 + 75^2))

A = 10,000 + 100 (sqrt 2575) + 100 (sqrt 2575)

A = 20,148.90 mm^2

 

Therefore the surface area of the pyramid is about 20,149 mm^2.

8 0
3 years ago
What is 1 1/2 minus 1/4
vfiekz [6]
1 1/2 - 1/4
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That makes it 1 2/4 - 1/4. That equals 1 3/4.


Hope that this helped! :)
8 0
3 years ago
Read 2 more answers
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melomori [17]

Answer:

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2: 2/3 = 4/6 = 6/9

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Step-by-step explanation:

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