There are 820 people at a stadium.65% of them are adults,20% of them are boys,and the rest are girls. How many girls are there at the stadium?

Answers

Answer 1

Answer: 100% - 65% - 20% = 15% girls.

15% = 0.15

820 * 0.15 = 123 girls

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Three friends fill bags with trash at a neighborhood cleanup. Randall's bag weighs 3x-7 pounds, Seth's bag weighs 2x - 10 pounds, and joanna's bag weighs 2x+2 pounds. Together, Randall's and Joanna's bags weigh 3 times as much as Seth's bag. How many pounds of trash does each friend pick up?

Answers

Final answer:

To solve this problem, set up an equation using the given weights and solve for 'x' to find the weights of each friend's bag.

Explanation:

To solve this problem, we need to set up an equation based on the given information.

First, let's express the weights of Randall's, Seth's, and Joanna's bags in terms of 'x':

Randall's bag: 3x - 7 pounds
Seth's bag: 2x - 10 pounds
Joanna's bag: 2x + 2 pounds

According to the problem, Randall's and Joanna's bags together weigh 3 times as much as Seth's bag. Mathematically, this can be written as:

(3x - 7) + (2x + 2) = 3(2x - 10)

Solving this equation will give us the value of 'x', which we can then use to find the weights of each friend's bag.

Learn more about Finding weights of bags here:

brainly.com/question/32831986

#SPJ2

Answer:

Randall=68 pounds, Seth's=40, Joanna's=52

Step-by-step explanation:

Randall's = 3x-7

Seth's = 2x-10

Joanna's = 2x+2

Randall's + Joanna's = 3 (Seth's)

Find X:

Form into an equation (add parentheses)
(3x-7) + (2x+2) = 3 (2x-10)
REmove parentheses on left side
3x-7+2x+2 = 3 (2x-10)
Distribute right side
= 6x-30
3x-7+2x+2 = 6x-30
Combine like terms
5x-5=6x-30
subtract 5x from BOTH sides (always subtract, add, multiply, and divide both sides at the same time)
-5=x-30
Add 30 to BOTH sides
25=x

Find how many pounds of trash each friend picked up:

Randall's:

3x-7
plug in x
3(25)-7
Distribute
75-7
= 68

Seth's:

2x-10
2(25)-10
50-10
= 40

Joanna's:

2x+2
2(25)+2
50+2
=52

Double check your answers:

Randall's+Joanna's= Seth's(3)

68+52=40(3)

120=120

You're good to go!

How many triangles are in a octagon?

Answers

Eight, if each triangle is of equal size. Please refer to poorly drawn picture to see the division of the octagon. Also, octa is kinda like eight

Answer: There are 632 triangles in an octagon. (a big one)

But usually 8, it depends how big the triangle is.

What is the median of the data set?

12, 25, 16, 9, 5, 22, 27, 20

Answers

the answer is 7. 9 + 5 / 2 equals to 7. 9 and 5 and the two middle numbers.

Answer:

Step-by-step explanation:

Complete the square to transform the quadratic equation into the form (x – p)2 = q.x2 + 4x - 19 = 5

Answers

Answer:

Step-by-step explanation:

A bookmark is shaped like a rectangle with a semicircle attached at both ends. The rectangle is 14 cm long and 4 cm wide. The diameter of each circle is the width of the rectangle. What is the area of the bookmark? Use 3.14 for π.PLS HELP DUE TOMMORROW.