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Aleonysh [2.5K]
3 years ago
6

A triangular pyramid has a base with an area of 21.8 square meters, and lateral faces with bases of 7.1 meters and heights of 9

meters. Enter an expression that can be used to find the surface area of the triangular pyramid.
Mathematics
1 answer:
Ymorist [56]3 years ago
8 0

Answer:

Step-by-step explanation:

A triangular pyramid has a base with an area of 21.8 square meters, and lateral faces with bases of 7.1 meters and heights of 9 meters. Enter an expression that can be used to find the surface area of the triangular pyramid.

The expression is written as:

Surface Area = Area of the base + 1/2( Perimeter × Slant height)

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A. find the value of a. B. Find the value of the marked angles.
Marat540 [252]

The marked angles are opposite angles, and as such they have the same measure. So, we have

6a+11 = 2a+83

Subtract 2a and 11 from both sides to get

4a = 72

Divide both sides by 4 to get

a = \dfrac{72}{4} = 18

Now that we know the value of a, we can compute the measure of the angles. We can also verify that the solution we found is correct by verifying that both expressions actually give the same result:

6a+11 = 6\cdot 18 + 11 = 119

2a+83 = 2\cdot 18 + 83 = 119

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crimeas [40]

Answer:

i think it is b but not sure

Step-by-step explanation:

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3 years ago
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During a 20% off sale, the sale price of a bluetooth radio was $33.96. What was the regular price?
SVETLANKA909090 [29]

20% of the regular price was off.

So 80% of the regular price stayed on.

$33.96 was that 80% of the regular price.

(0.8) · (regular price)  =  $33.96

Divide both sides by (0.8).

Regular price =  ($33.96) / (0.8)

<em>Regular price = $42.45</em>

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3 years ago
What is the equation of a line that goes through the point
HACTEHA [7]
Point = (0, 56)
Slope = 1

This is where you would use point slope.
y - y1 = m(x - x1)
y - 56 = 1(x - 0)
y - 56 = x
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Kimmy’s savings account has a balance of $76.23 in June. By September, her balance is 5 times as much as her June balance. Betwe
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Kimmy’s balance in December will be $486.98.

Explanation:
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The balance In December is $486.98.
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