Please help with 1 and 2... Thanks Fam :)

P.s Show Work

Answers

Answer 1

Answer: Ok so,
#1 is a triangular pyramid as we can see.
The surface area formula of a pyramid is:
S.A = Area of base + $(1)/(2)$ × perimeter of base × slant height
The base is 8 cm ( 4cm + 4cm = 8cm)
Height of the triangle is 3.5 cm
Area formula of a triangle is:
A = $(1)/(2)$ bh
P = all sides added together

Substitute them:
S.A = $(1)/(2)$ × 8 × 3.5 + $(1)/(2)$ ×(8 + 8 + 8) × 5
S.A = 14 + 60
= 74 cm²

and #2 is a squared-based pyramid
Same formula applies.
And we know that the area formula of a square is:
A = s²
P = add all sides together

S.A = 2² + $(1)/(2)$ × (2 + 2 + 2 + 2) × 3
= 4 + 12
= 16 ft²

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A 100 centimeter stick broke into 3 pieces one piece was 7 centimeters long and another was 34 centimeters long how long was the third piece

Answers

The third piece is 59 cm long.

Add the first two pieces up. 7+34= 41. Since the whole stick is 100 cm long, subtract 41 from 100 to find the length of the third piece. 100-41=59.

Answer:

59 cenitmeters

Step-by-step explanation:

34+7=41

100-41=59.

At a concert 5/9 of the people in line are girls. 2/3 are wearing glasses, what fraction of the people are wearing glasses?

Answers

The girl bit doesn't really matter except for how it says 5/9 which shows that you should factor it by 3's. If you multiply both the 2 and the 3 in 2/3 you would clearly get 6/9. Which is the same thing but is to get it matching with how the question wrote about the people wearing glasses.

Answer: 6/9 people

Convert: 17 yards to meters (to the nearest tenth). 1.6 15.5 155.4 1,554.5

Answers

1 yard = 0.9144 meters.

0.9144 * 17 = 15.5448

15.448 rounded is 15.5

36 is what percent of 40

Answers

36 is 90 percent of 40.

We have,

To determine what percentage 36 represents in relation to the whole value of 40.

To do this, we use the formula for finding a percentage:

Percentage = (Part / Whole) x 100

In this case, the part is 36, and the whole is 40.

By substituting these values into the formula, we get:

Percentage = (36 / 40) x 100

Simplifying the calculation:

Percentage = 0.9 x 100

Percentage = 90

This means that 36 is equal to 90% of 40.

In other words, 36 represents 90% of the totalvalue of 40.

Thus,

36 is 90% of 40.

Learn more about percentages here:

brainly.com/question/11403063

#SPJ6

divide the smaller number by the larger number

36/40

is 9/10

which is 90%

Kate has a piece of ribbon 7ft long. She is going to cut it into 12 equal-length pieces. How long will each piece be?

Answers

7/12=0.58333333

Which is rounded to 0.6

Helppp!! Please !!!!

Answers

Answer:

1) x=9

edit:

2) x=25

Step-by-step explanation:

Since all angles added together in any triangles is 180,

we can conclude that

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

solving for x:

180=19x+9

180-9=19x

171=19x

x=9

Edit:

2)since we are given the outside angle we have to find the inside one first before finding the other angles, a straight line is 180 degrees aswell, so 180-(3x-10) would give you the inside angle in terms of x

so adding them all together again should ewual 180:

180=(180-(3x-10))+25+(x+15)

180=180-3x+10+25+x+15

0=-2x+50

2x=50

x=25

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