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
Ber [7]
3 years ago
9

Question for the kids orrr?

Mathematics
1 answer:
babunello [35]3 years ago
6 0

Answer:

B. 18 sq in.

Step-by-step explanation:

Surface area of the triangular pyramid excluding the base = area of the three triangular faces = 3(½ × base × height)

Where,

base = 3 inches

height = ED = 4 inches

Plug in the known values into the equation

Surface area of the triangular pyramid excluding the base = 3(½ × 3 × 4)

= 3(3 × 2)

= 3(6)

= 18 sq in.

You might be interested in
F=(9/5) C +32, C=15 Can you show me what a graph looks like?
CaHeK987 [17]

Answer:

Step-by-step explanation:

F=(9/5) C +32 has the form of the equation of a straight line:  y = mx + b, where m is the slope and b is the y-intercept.  By comparing these two equations we see that the slope, m, is (9/5) and the y-intercept is 32 (or (0, 32)).

To graph this, first locate the y-intercept (0, 32); put a dark dot there.  Since the slope is 32, or 32/1, move your pencil point 1 unit to the right, from (0, 32) to (1, 32), and then from (1, 32) move y our pencil point 32 units upward.  Plot another dark dot there and then draw a straight line through these two points.

We can evaluate the given function F=(9/5) C +32 at C = 15 by replacing C in the formula with 15:  F = (9/5)(15) + 32, or F = 59.

8 0
3 years ago
Guys please help me I have to find the perimeter of the following semicircle​
pantera1 [17]

Answer:

answer

is 33 because 22/7×21/2

3 0
3 years ago
the sum of the 10th and 11th terms of an arithmetic sequence is 65 what is the sum of its first 20th terms​
Dmitriy789 [7]

Answer:

this is the answer

Step-by-step explanation:

a 65

b 650

c 52

d 3

6 0
2 years ago
a rectangle is 28 feet by 41 feet. If it can be determined, which of the following gives the whole number length, in feet, of a
rjkz [21]

Answer:

c = 20 ft  

Step-by-step explanation:

The largest square will be 14 sqrt(2) ft long


To figure out the side length of the square

use the pythagorean theorem

a^2 + b^2 =c^2

we are limited by the shortest side of the rectangle

28 ft

each side of the triangle is 1/2 the length of the short side of the rectangle or 14 ft

a^2 + b^2 =c^2

14^2 + 14^2 = c^2  where c is the side of the square

196 + 196 = c^2

392 = c^2

take the square root of each side

sqrt(392) = sqrt(c^2)

c = 14sqrt(2)

c = 19.799ft

to the nearest whole number

c = 20 ft  


5 0
3 years ago
A house is purchased for $205,000, and a down payment is made for 20% of the purchase price, is made. Calculate the mortgage bal
lord [1]
205,000−(205,000×0.20)=164,000
7 0
3 years ago
Other questions:
  • a 5 miles race is approximately 8.05km . John is going to run a 5km race this Saturday. how many miles will he run ( round to th
    12·1 answer
  • Is the number 4.333..... rational or irrational?
    10·1 answer
  • How do you find the perimeter of a tennis court with an area of 7,200?
    6·1 answer
  • Which of the following statements is false?
    10·1 answer
  • The distance between two cities on a map is 3.5 centimeters. The map uses a scale in which 1 centimeter represents 20 kilometers
    10·1 answer
  • The above figure is a special trapezoid. Explain the relationship between the m∠B and m∠C.
    12·1 answer
  • Use addition to solve the system of linear equations. Include all of your work in your final answer.
    9·1 answer
  • Describe a transformation or series of transformations that demonstrates the congruence between figures A and B.
    13·1 answer
  • How to calculate<br> 1/2 × 24cm²​
    13·1 answer
  • How can you put 33 people into different classes
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!