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exis [7]
3 years ago
9

The isosceles triangle has a perimeter of 7.5m. Which equation can be used to find the value of x if the shortest side, y, measu

res 2.1 m?
Mathematics
2 answers:
Leni [432]3 years ago
5 0

Answer:

2.1 +2x=7.5

Step-by-step explanation:


Alexus [3.1K]3 years ago
3 0
2.1 +2x=7.5
2x=7.5-2.1
2x=5.4
x=2.7

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Please help!!! I will give brainliest but only if you try and help.
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Answer:

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Since we have to predict, we can use ratios to help us solve this.

12 said yes out of 72 randomly chosen, SO,

if 210 would say yes (goes to play), how many is total??

12 is to 72 AS 210 is to HOW MUCH (let it be x)??

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8 0
3 years ago
roberto has 12 tiles. each tile is 1 square inch. he will arrange them into a rectangle and glue 1-inch stones around the edge.
LUCKY_DIMON [66]
To answer this you will need to determine which area made with the 12 square tiles would give the shortest perimeter.

Think of all the combinations to get 12 square inches
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3 0
2 years ago
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Answer: Decompose means the opposite, to take apart. In this lesson, the words composition and decomposition are used to describe how irregular figures can be separated into triangles and other polygons. The area of these parts can then be added together to calculate the area of the whole figure.

Step-by-step explanation:

8 0
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:

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

First find the perimeter and Area of the base pyramid.

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

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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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