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Andre45 [30]
3 years ago
6

When comparing the two sets of data, what is a true statement

Mathematics
2 answers:
PolarNik [594]3 years ago
4 0

Answer:

b

Step-by-step explanation:

timurjin [86]3 years ago
3 0

Answer:

the answer is b

Step-by-step explanation:

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If a polynomial function f(x) has roots 3 and square root of 7 what must also be a root of f(x)?
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Whenever you have a root of sqrt #, you must have the matching - (or positive).
This is because when you take a square root you get two solutions a positive and a negative.
The answer is LETTER A
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John, Jack, and Jill have 159 marbles altogether. John has 2 more marbles than Jack, and if Jill gave 5 marbles to Jack, Jack wo
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someone else tell me to thank you

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Find the lowest common multiple (LCM) for 5 and 7
Paha777 [63]
The lcm of 5 and 7 is 35
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A shop owner spent $540 to purchase a stock of computer keyboards. If the price of each keyboard had been reduced by $2, he coul
AURORKA [14]

Answer:

Price before discount = $20 per keyboard

Price after discount = $18 per keyboard

Before the discount, you can buy 27 keyboards. After the discount, you can buy 30 keyboards.

===============================================

Work Shown:

k = cost of one keyboard before the price reduction

540/k = amount of keyboards purchased before the price reduction

k-2 = cost of one keyboard after the price reduction

540/(k-2) =  amount of keyboards purchased after the price reduction

540/(k-2) = (540/k) + 3

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

If you multiply both sides by the LCM k(k-2), then you'll clear out the fractions and we can solve for k like so

540/(k-2) = (540/k) + 3

540k = 540(k-2) + 3k(k-2)

540k = 540k - 1080 + 3k^2 - 6k

0 = 540k - 1080 + 3k^2 - 6k - 540k

0 = 3k^2 - 6k - 1080

3k^2 - 6k - 1080 = 0

3(k^2 - 2k - 360) = 0

k^2 - 2k - 360 = 0

(k - 20)(k + 18) = 0

k-20 = 0 or k+18 = 0

k = 20 or k = -18

We ignore the negative result because a negative price doesn't make sense.

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

If k = 20, then

540/k = 540/20 = 27

Meaning that you can buy 27 keyboards before the price reduction

In other words, (27 keyboards)*(20 dollars per keyboard) = 540 dollars total.

After the price reduction, the cost per keyboard is now k-2 = 20-2 = 18

We can now buy 540/(k-2) = 540/18 = 30 keyboards, which is an increase of 30-27 = 3 extra keyboards. This helps confirm we have the correct answer.  

3 0
3 years ago
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Function: Yes or no<br><br> {(-3,4),(-2,5),(0,0),(-2,5),(4,8)}
Dmitry [639]

Answer:

Yes.

Step-by-step explanation:

Every input has a specific output.

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