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Snowcat [4.5K]
3 years ago
10

What is the value of x?

Mathematics
1 answer:
loris [4]3 years ago
6 0

Answer: x = 9, y = 5

Step-by-step explanation:

If all of the sides are equal, it is an equilateral triangle. Equilateral triangles are also equiangular. The angles of a triangle add up to 180 degrees, so each angle must equal 60 degrees.

set the equation equal to 60 to solve for x

7x - 3 = 60

add three to both sides

7x = 63

divide both sides by 7

x = 9

find y by setting the equation equal to 60

11y + 5 = 60

subtract 5 from each side

11y = 55

divide both sides by 11

y = 5

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Right triangle ABC has three sides with lengths AB= 119, BC = 169, CA= 120. Find the value of cos C. hint: draw and label the tr
GenaCL600 [577]

Answer:

\cos(C)=\frac{120}{169}

Step-by-step explanation:

The triangle is shown in the attachment.

Recall that;

\cos(C)=\frac{Adjacent}{Hypotenuse}

This implies that;

\cos(C)=\frac{|AC|}{|BC|}

We substitute the values into the ratio to obtain

\cos(C)=\frac{120}{169}


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3 years ago
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I NEED A MATH WIZ!
valentinak56 [21]
So each of these statements are talking about the square footage of land per person. Let's go and find it!

First off, let's find the number in each building of the original complex:
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Each building has an equal number of residents. So just divide:
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Now consider the fact that once a new building is built, another 70 people will move in.
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Then lets look at the plot of land
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Go back to the question. What's the effect of the expansion in terms of square feet of land per person?
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Then since it's being compared to the amount each resident had before the expansion, do the same thing with the corresponding numbers:
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3 years ago
Which is the simplified form of r^-7 + s^-12? arrows to the left of -7 and -12 represent exponents,
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3 years ago
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