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3 years ago

Why do you think students have difficulty understanding the concept of a mathematical function?

Mathematics

1 answer:

pantera1 [17]3 years ago

4 0

Answer:

Because they have never had to express one quantity in terms of another. The idea of such a relationship is completely new, as is the vocabulary for expressing such relationships.

Step-by-step explanation:

"Function" is a simple concept that says you can relate two quantities, and you can express that relationship in a number of ways. (ordered pairs, table, graph)

The closest experience most students have with functions is purchasing things at a restaurant or store, where the amount paid is a function of the various quantities ordered and the tax. Most students have never added or checked a bill by hand, so the final price is "magic", determined solely by the electronic cash register. The relationship between item prices and final price is completely lost. Hence the one really great opportunity to consider functions is lost.

Students rarely play board games or counting games (Monopoly, jump rope, jacks, hide&seek) that would give familiarity with number relationships. They likely have little or no experience with the business of running a lemonade stand or making and selling items. Without these experiences, they are at a significant disadvantage when it comes to applying math to their world.

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1/5= 6x and 1/3= 10x

Lady bird [3.3K]

Answer:

1/30

Step-by-step explanation:

1/5 = 6x ....divide both sides by 6

(1/5) / 6 = x

1/5 * 1/6 = x

1/30 = x

1/3 = 10x...divide both sides by 10

(1/3) / 10 = x

1/3 * 1/10 = x

1/30 = x

so x = 1/30

4 0

3 years ago

Read 2 more answers

For each x and n, find the multiplicative inverse mod n of x. Your answer should be an integer s in the range 0 through n - 1. C

krok68 [10]

Use the Euclidean algorithm to express 1 as a linear combination of $x$ and $n$ .

a. $52^{-1}\equiv40\pmod{77}$ because

77 = 1*52 + 25

52 = 2*25 + 2

25 = 12*2 + 1

so we can write

1 = 25 - 12*2 = 25*25 - 12*52 = (77 - 52)(77 - 52) - 12*52 = 77^2 - 2*52*77 + 52^2 - 12*52

Taken modulo 77 leaves us with

$1\equiv52\cdot52-12\cdot52\equiv40\cdot52\pmod{77}\implies52^{-1}\equiv40\pmod{77}$

b. First, $77\equiv25\pmod{52}$ , so really we're looking for the inverse of 25 mod 52. We've basically done the work in part (a) already:

1 = 25*25 - 12*52

Taken modulo 52, we're left with

$1\equiv25\cdot25\pmod{52}\implies25^{-1}\equiv25\pmod{52}$

c. The EA gives

71 = 1*53 + 18

53 = 2*18 + 17

18 = 1*17 + 1

so we get

1 = 18 - 17 = 3*18 - 53 = 3*71 - 4*53

so that taken module 71, we find

$1\equiv(-4)\cdot53\pmod{71}\implies53^{-1}\equiv-4\equiv67\pmod{71}$

d. Same process as with (b). First we have $71\equiv18\pmod{53}$ , and we've already shown that

1 = 3*18 - 53

which means, taken modulo 53, that

$1\equiv3\cdot18\pmod{53}\implies71^{-1}\equiv18^{-1}\equiv3\pmod{53}$

6 0

3 years ago

Am I correct? If not please explain and which one!? THANK SO MUCH ❤️

Rzqust [24]

Answer:

No, your answer is incorrect.

simplify the question that would be the last one D.

Step-by-step explanation:

if this helped you please mark brainliest <3

6 0

3 years ago

See attachment for the whole question.

KengaRu [80]

Using probability concepts, it is found that:

a) $\frac{4}{13}$ probability of drawing a card below a 6.

b) $\frac{4}{9}$ odds of drawing a card below a 6.

c) We should expect to draw a card below 6 about 4 times out of 13 attempts, which as an odd, it also 4 times for every 9 times we draw a card above 6, which is the third option.

------------------------------

A probability is the number of desired outcomes divided by the number of total outcomes.

Item a:

In a standard deck, there are 52 cards.
There are 4 types of cards, each numbered 1 to 13. Thus, $4 \times 5 = 20$ are less than 6.

Then:

$p = \frac{20}{52} = \frac{4}{13}$

$\frac{4}{13}$ probability of drawing a card below a 6.

Item b:

Converting from probability to odd, it is:

$\frac{4}{13 - 4} = \frac{4}{9}$

$\frac{4}{9}$ odds of drawing a card below a 6.

Item c:

The law of large numbers states that with a large number of trials, the percentage of each outcome is close to it's theoretical probability.
Thus, we should expect to draw a card below 6 about 4 times out of 13 attempts, which as an odd, it also 4 times for every 9 times we draw a card above 6, which is the third option.

A similar problem is given at brainly.com/question/24233657

7 0

3 years ago

Solve the system of equations by substitution 2x+3y=9 y=x−2

garri49 [273]

so I think u you divide something and you times and then you multiply it

6 0

3 years ago

Read 2 more answers