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3 years ago

15

Help pls ............

2 answers:

telo118 [61]3 years ago

7 0

Answer: Im pretty sure its C

Step-by-step explanation:

kolezko [41]3 years ago

3 0

It’s A:
- You’re trying to find the line that has numbers everything less than -1
- Everything that goes to the left is less than -1
- Since the sign < represents just “less than” and not “less than or equal to” we choose the one with an open dot. (If there was an equal to included, the closed dot would’ve been chosen)

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Margarita [4]

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3 years ago

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madam [21]

Answer:

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Step-by-step explanation:

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2 years ago

A triangular pyramid has a base shaped like an equilateral triangle. The legs of the equilateral triangle are all 20 inches long

Pie

Answer:

Surface area of pyramid with base equilateral triangle is $390+100\sqrt{3}$ square inches

Step-by-step explanation:

Recall the following result:

The total surface area(S) of a regular pyramid is given by,

$S = \frac{1}{2}pl+B$ ...... (1)

Here, p represents the perimeter of the base , $l$ the slant height and B the base area of the pyramid.

From the given information:

Side of equilateral triangle = 20 inches

Slant height of the pyramid( $l$ ) = 13 inches.

First find the perimeter and Area of the base pyramid.

Perimeter of equilateral triangle(p) = $3 \times (side)$

= $3 \times 20 = 60 inches$

Area of equilateral triangle(B) = $\frac{\sqrt{3} }{4} \times (side)^{2}$

= $\frac{\sqrt{3} }{4} \times (20)^2 = 100\sqrt{3}$ square inches.

Substitute the above values in equation (1) as shown below:

$S=\frac{1}{2} \times 60 \times 13+100\sqrt{3}$

$S= 390+100\sqrt{3}$ square inches

Hence, the surface area of pyramid with base equilateral triangle is $390+100\sqrt{3}$ square inches.

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2 years ago

Solve -6 - 4(-3) - 2 + 1 a.6 b.3 c.-3 d.-6

Murljashka [212]

Answer:

Answer 5

Step-by-step explanation:

-6+12-2+1

=6-2+1

=5

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2 years ago

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Step-by-step explanation:

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3 years ago