Please help I’m confused

x = 9

The angles: 71, 62, and 47

Step-by-step explanation:

The total of 3 angles of a triangles equals 180 degrees

so (7x + 8) + (7x - 1) + (5x + 2) = 180

7x + 8 + 7x - 1 + 5x + 2 = 180

19x + 9 = 180

19x = 171

x = 9

so

7x + 8 = 7(9) + 8 = 71

7x - 1 = 7(9) - 1 = 62

5x + 2 = 5(9) + 2 = 47

a net is a diagram that shows a “flattened” view of a solid. in a net, each face and base is shown with all of its dimensions. a net can also serve as a pattern to build a three-dimensional solid.

a pyramid is a three-dimensional object with a base that is a polygon and triangular faces that meet at one vertex.

" the net of a triangular pyramid consists of four triangles. the base here we are given of the pyramid is a equilateral   triangle, and the lateral faces are also triangles "

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )