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2 years ago

What is the surface area of the square pyramid? (Figure is not drawn to scale.)

Mathematics

1 answer:

Reil [10]2 years ago

6 0

Area of the base = 8^2 = 64

area of 1 traingle = 1/2 * 8 * 5.4 = 21.6

there are 4 triangular sides so their area = 4 * 21.6 = 86.4

Total surface area = 64 + 86.4 = 150.4 cm2

D

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A theater charges $5.00 admission for adults and $2.50 for children. At one showing 240 admissions brought a total of $800. How

SOVA2 [1]

Answer:

Step-by-step explanation:

Let the number of adults be x

Let the number of children be y

This means that the money paid by adults and kids is $5 multiplied by x (5x) and $2.50 multiplied by y (2.5y)

This will give two equations as shown below

x + y = 240 total admissions......................... equation 1

5x + 2.5y = 800 total money paid..................equation 2

Making x the subject of formula in equation 1

x=240-y......................................................equation 3

Substituting equation 3 into equation 2

5(240-y) + 2.5y = 800 removing the brackets

1200 - 5y + 2.5y = 800 grouping like terms

-5y + 2.5y = 800-1200 simplifying

-2.5y = -400 therefore

-2.5y/-2.5 = -400/-2.5

y = 160

Substituting y into equation 3

x = 240 - y

x = 240 - 160

x = 80

Hence number of adults who attended = 80

8 0

2 years ago

Can someone please help me out? I am noooottt good at these.

Sliva [168]

Answer:

your answer to page one is

3 11/24

the second page is

13 2/3

the third one is

10.7

the forth one is also 10.7

5 0

2 years ago

Read 2 more answers

If 4 cooks can prepare a buffet in 15 mins how long would it take 6 cooks

mixas84 [53]

Answer:

it will probably take the same amount of time since they are cooking the same amount and the food doesn't take any less to cook if there's more people but they could tidy and bring the food out faster but the time to cook the food will remain the same.

5 0

2 years ago

Need help ASAP!!!!!!

Mnenie [13.5K]

Answer:

Mean = 2.95

Median = 3

Step-by-step explanation:

The mean of the number of visits of 40 adults to the gym is

$\dfrac{0\cdot 4+1\cdot 3+2\cdot 12+3\cdot 5+4\cdot 8+5\cdot 5+6\cdot 2+7\cdot 1}{40}=\\ \\=\dfrac{3+24+15+32+25+12+7}{40}=\dfrac{118}{40}=2.95$

The median of the data is the average number between 20th and 21th terms (because 40 is even number, so the middle term is the average between two middle terms).

20th term = 3 visits

21th term = 3 visits

Hence, median is 3 visits

6 0

2 years ago

What is X in the equation -15x+15(-4)=-30

love history [14]

Answer: x=-2 *The answer should be the negative sign.*

Step-by-step explanation:

distributive property: a(b+c)=ab+ac

remove parenthesis

-15x-15*4=-30

15*4=60

-15x-60=-30

add 60 both sides of an equation.

-15x-60+60=-30+60

simplify.

-15x=30

divide by -15 both sides of an equation.

-15x/-15=30/-15

simplify.

30/15=2

x=-2

Hope this helps!

Thanks!

Have a great day!

7 0

2 years ago