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Leni [432]
2 years ago
10

Lim f(x) = 19, find the value of A and B, if the lim f(x) = Ax – 3B and lim f(x) = **+ B

Mathematics
1 answer:
podryga [215]2 years ago
6 0

Answer:

  A = 4, B = 3

Step-by-step explanation:

In order for the limit to exist and have a value of 19, the left limit and the right limit must both have that value at x=7.

  left limit = 19

  right limit = 19

__

  4A(7)/7 +B = 19

  A(7) -3B = 19

Adding 3 times the first equation to the second gives ...

  3(4A +B) +(7A -3B) = 3(19) +(19)

  19A = 4(19) . . . . . simplify

  A = 4 . . . . . . . . divide by 19

Substituting into the first equation gives ...

  4(4) +B = 19

  B = 3 . . . . . . . subtract 16

A is 4, B is 3.

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HELP RN.
Alina [70]

Answer:

30 dollars

Step-by-step explanation:

packages-$12.36 x 2=24.72

broccoli-$1.98/2=.99

milk-$3.49

$24.72+.99=25.71

$25.71+$3.49=29.20

$29.20+.80=30.00

she payed with $30.00

6 0
3 years ago
Which equation, when solved, results in a different value of x than the other three?
kicyunya [14]
I would have to say -7(1/8)x-4/3=20.


The first and the second one both result in
-23 5/7

The last one results in -24 8/21

but the third one is -22 3/8.

So your answer is either the third of the last one. I assumed the third because, it is lower than all others and the first two are closer to 24 than they are to 22. It’s your choice on how to judge it.
5 0
3 years ago
Diego and Lin are drinking milkshakes. Lin starts with 12 ounces and drinks 1/4 an ounce per second. Diego starts with 20 ounces
sammy [17]

Answer:

Lin = 48 seconds  

Diego = 30 seconds  

Step-by-step explanation:

Hi, to answer this question we have to divide the total ounces of drink by the amount that each one drank per second, for each case.

Mathematically speaking:

Lin = 12 ounces / (1/4) ounces/second = 12/ (1/4) = 48 seconds  

Diego = 20 ounces / (2/3) ounces/second = 20/ (2/3) = 30 seconds  

Feel free to ask for more if needed or if you did not understand something.

3 0
3 years ago
Does the point (5, 2) satisfy the inequality y < 9x + 4?
Allushta [10]

Answer:

yes

Step-by-step explanation:

2< 9(5) + 4

2 < 45 + 4

2 < 49

6 0
3 years ago
Read 2 more answers
What is 20% of 20? ...............
denis-greek [22]
The answer would be four
3 0
4 years ago
Read 2 more answers
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