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vlabodo [156]
3 years ago
8

Can u help me with this one

Mathematics
1 answer:
ivann1987 [24]3 years ago
4 0

Answer: 111 degrees

Step-by-step explanation:

A straight line is 180 degrees, so since AB is 180 and BC is 69, 180-69=111

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Find the surface area of the figure below.
gayaneshka [121]

Answer:

261 cm²

Step-by-step explanation:

To find the surface area of a square pyramid, you must first recognize all of the shapes.

There are four triangles and one square.

  • To find the area of a square, multiply the side by itself twice.
  • To find the area of a triangle, multiply the base and the height, then multiply the product by 1/2.

The triangles have a base of 9 and a height of 10.

9*10=90

Multiply the product by 1/2.

90*1/2 = 45

There are four triangles.

45*4=180

The area of all three triangles is 180 centimeters; the area of a single triangle is 45 centimeters.

There square has sides of 9 centimeters.

9*9=81

The area of the square is 81 centimeters.

Lastly, we add the areas of the shapes.

45+45+45+45+81 = 261.

Therefore, the surface area of this square prism is 261 cm².

You can use this layout to find the surface area of a square pyramid.

6 0
3 years ago
Can someone please help me with this?!
Alinara [238K]

Answer: y=\frac{1}{4}x-3


Step-by-step explanation:

- The equation of the line in the slope intercept form is: y=mx+b

Where m is the slope and b is the y-intercept of the line

- Let's choose two points of the line: (8,-1) and (-4,-4).

- You must calculate the slope of the line as following:

m=\frac{y_2-y_1}{x_2-x_1}=\frac{-4-(-1)}{-4-8}=\frac{1}{4}

- As you can see in the graph attached, the line intersects the y-axis at -3, then b=-3.

- Substituting values into the equation of the line, you obtain:

y=\frac{1}{4}x-3


3 0
3 years ago
5/6 of a number is 65.<br> Find the number.
Dmitry [639]
The answer is 78

Explanation:

65 / 5 = 13
(13 = 1/6)
13*6 = 78
3 0
2 years ago
Read 2 more answers
Texas chic. <br> This is for you
saw5 [17]
Ur outlier is 21

mean is : 5
deviation is 2.6

so ur answer is : 2nd one

8 0
3 years ago
Find x and IJ is HK is an altitude of triangle HIJ
ss7ja [257]
3x+3=90
subtract 3 from both sides
3x=87
divide both sides by 3
x=29

To find IJ, plug in the x value
x+8+x-9
29+8+29-9
57=IJ
4 0
3 years ago
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