1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
konstantin123 [22]
3 years ago
8

What is the surface area of a triangular pyramid if each face has an area of 30mm squared?

Mathematics
2 answers:
e-lub [12.9K]3 years ago
7 0
A triangular pyramid has 4 triangles
3 are sides
1 is th base
they are normally all the same area
if 1 is 30
3*4=120
yah, 120mm squared is answer
netineya [11]3 years ago
3 0
I hope this helps you



3 triangles area+square area


3.30+30


90+30


120
You might be interested in
Classify ∠2 and ∠6. Compare angle measures, and give the postulate or theorem that justifies it.
LenaWriter [7]

Answer:

Explanation

Step-by-step explanation:

Angles 2 and 6 are corresponding angles in a transversal meaning they have the same measure.

4 0
2 years ago
Which equation has a slope of -6 and a y-intercept of 5
masya89 [10]

Answer:

Correct answer is B

Step-by-step explanation:

hope it helps ^^

7 0
3 years ago
What multiplication expression is equal to 3/4 divided by 1/3
kakasveta [241]

Answer:

<u>3</u> * <u>3</u>

4    1

Step-by-step explanation:

To convert division problems with fraction into multiplication problems use the KCF rule

  • Keep the 1st Fraction the same
  • Change the division sign to a multiplication sign
  • Flip the fraction (reciprocal)

5 0
3 years ago
Lin bought 1 pretzel from a snack cart that was marked $4.50. Why did she pay $4.83?
marshall27 [118]

Answer:

Sales tax

Step-by-step explanation:

You might have like 3% sales tax which is 3 percent of the original price added back onto it.

Sales tax is a tax that is put onto wanted and gourmet things, so chocolate isn't a needed item in life, so you have sales tax on it. On something like bread or meat, there might not be sales tax since you need food to survive. If something cost $100, and there is 3% sales tax, you will pay 103 dollars since 0.03 of 100 is 3.

4 0
3 years ago
You have been saving nickels, dimes, and quarters in a jar for about a year. You decide to see how much money you've saved up. W
anyanavicka [17]

Answer:

x = number of nickels = 127

y = number of dimes = 156

z = number of quarters = 78

Step-by-step explanation:

Let

x = number of nickels

y = number of dimes

z = number of quarters

Total worth of the coins = $41.45

Total number of coins = 361

x + y + z = 361 (1)

dime = $0.1,

nickel = $0.05

quarter = $0.25

0.05x + 0.1y + 0.25z = 41.45 (2)

twice as many dimes as quarters.

y = 2z

Substitute y = 2z into (1) and (2)

x + 2z + z = 361

0.05x + 0.1(2z) + 0.25z = 41.45

x + 3z = 361

0.05x + 0.2z + 0.25z = 41.45

x + 3z = 361 (3)

0.05x + 0.45z = 41.45 (4)

Multiply (4) by 20

x + 3z = 361 (3)

x + 9z = 829 (5)

Subtract (3) from (5)

9z - 3z = 829 - 361

6z = 468

Divide both sides by 6

z = 468 / 6

= 78

z= 78

Recall,

y = 2z

= 2(78)

= 156

y = 156

Substitute the value of y and z into

x + y + z = 361

x + 156 + 78 = 361

x + 234 = 361

x = 361 - 234

= 127

x= 127

x = number of nickels = 127

y = number of dimes = 156

z = number of quarters = 78

6 0
3 years ago
Other questions:
  • For a class experiment, Sally's class weighed a log before and after
    11·1 answer
  • Jessica is thinking of a number that rounds to 1,300 for the nearest ten and for the nearest hundred.What number might she be th
    10·1 answer
  • If a x 10n is scientific notation, then a must be between 1 and ___.
    13·1 answer
  • What is 3/5 15 value
    6·1 answer
  • Lilly owes $52,000 in student loans for college. If the loan will be repaid in 5.5 years and the interest rate charged is 6.75%,
    13·1 answer
  • I need help please Math.
    10·1 answer
  • 3. Mateus recebe a visita do seu avô Pedro a cada 15 dias. João, o tio dele, o visita a cada 100
    7·1 answer
  • Elouise is creating a rectangular garden in her backyard. The length of the garden is 12 feet. The perimeter of the garden must
    13·1 answer
  • What is the equation of this graph ​
    7·1 answer
  • 30°
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!