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dlinn [17]
3 years ago
14

The least common multiple of 2 and 4

Mathematics
1 answer:
emmainna [20.7K]3 years ago
7 0

Answer:

4

Step-by-step explanation:

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HURRRYY PLEASEE<br> Determine the surface área of the pyramids below
lakkis [162]

Step-by-step explanation:

EXAMPLE OF SURFACE AREA

1/2 × (30×4) × 39 + (30×30)

= 60 × 39 + 900

= 2340 + 900

= 3240

4 0
2 years ago
What is 8c + c = , is it 8cc, 9c, 8c2, 8c
Mnenie [13.5K]

Answer:

9c

Step-by-step explanation:

if you take 8c and add another c, it equals 9c

8 0
2 years ago
1. Prove or give a counterexample for the following statements: a) If ff: AA → BB is an injective function and bb ∈ BB, then |ff
Fantom [35]

Answer:

a) False. A = {1}, B = {1,2} f: A ⇒ B, f(1) = 1

b) True

c) True

d) B = {1}, A = N, f: N ⇒ {1}, f(x) = 1

Step-by-step explanation:

a) lets use A = {1}, B = {1,2} f: A ⇒ B, f(1) = 1. Here f is injective but 2 is an element of b and |f−¹({b})| = 0., not 1. This statement is False.

b) This is True. If  A were finite, then it can only be bijective with another finite set with equal cardinal, therefore, B should be finite (and with equal cardinal). If A were not finite but countable, then there should exist a bijection g: N ⇒ A, where N is the set of natural numbers. Note that f o g : N ⇒ B is a bijection because it is composition of bijections. This, B should be countable. This statement is True.

c) This is true, if f were surjective, then for every element of B there should exist an element a in A such that f(a) = b. This means that  f−¹({b}) has positive cardinal for each element b from B. since f⁻¹(b) ∩ f⁻¹(b') = ∅ for different elements b and b' (because an element of A cant return two different values with f). Therefore, each element of B can be assigned to a subset of A (f⁻¹(b)), with cardinal at least 1, this means that |B| ≤ |A|, and as a consequence, B is finite.

b) This is false, B = {1} is finite, A = N is infinite, however if f: N ⇒ {1}, f(x) = 1 for any natural number x, then f is surjective despite A not being finite.

4 0
3 years ago
The volume of prism having its base a right angled triangle is 864cm^3.if the length of the sides containing the right angle are
Scrat [10]

Answer:

height: 36 cm

Step-by-step explanation:

volume of triangle prism = 0.5 * base * altitude * height

using the formula:

0.5 * 8 * 6 * height = 864

24 * height = 864

height = 864/24

height = 36 cm

7 0
2 years ago
Read 2 more answers
I don’t understand because I’m not good with money
lakkis [162]
So you divide 12.00 by 0.75 and you get 16 which is the number of cookies he sold.
4 0
3 years ago
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