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lisov135 [29]
2 years ago
11

26. During a sale, a store offered a 20% discount on a particular camera that was originally priced at $450.

Mathematics
2 answers:
NARA [144]2 years ago
7 0

Answer:

D.$315

Step-by-step explanation:

$450=100%

100%-20%-10%=70%

$450×70%=$450×70/100

=$315

alexira [117]2 years ago
3 0

Answer:

The answer is D.

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k0ka [10]

Answer:

2) C

3) D

4) D(5,-5)   E(2,-7)  F(4,-1)   G(8,-8)

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
I cannot solve this. I don't know how.
Pani-rosa [81]
<h3>Answer:</h3>
  • f(q) = q² -2q +3
  • f(x+h) = (x+h)² -2(x+h) +3
  • (f(x+h) -f(x))/h = 2x -2 +h
<h3>Step-by-step explanation:</h3>

The notation f(x) means you have a function that has been given the name f, and it makes use of the variable x. The variable in the parentheses is called the "argument" of the function f.

(a) To find f(q), you put q everywhere x is in the function equation. This is called evaluating the function for an argument of "q". In the following, note that we have simply changed x to q. (It's really that simple.)

... f(q) = q² -2q +3

(b) As in the previous case, we replace x with (x+h) everywhere.

... f(x+h) = (x+h)² -2(x+h) +3

You can multiply it out, but there appears to be no need to do so for this part of the question.

(c) The intent here is that f(x+h) and f(x) will be replaced by their values and the whole thing simplified. This requires you  expand the expression you see in part (b), subtract f(x), collect terms, and divide the whole thing by h. You have to make use of what you know about multiplying binomials.

We can do it in parts:

... f(x+h) = (x+h)² -2(x+h) +3

... = (x² +2xh +h²) + (-2x -2h) +3

Separating the h terms, this looks like ...

... = (x² -2x +3) + (2xh -2h +h²)

Now, we can finish the numerator part of the expression by subtracting f(x):

... f(x+h) -f(x) = (x² -2x +3) +(2xh -2h +h²) -(x² -2x +3)

You can see that the stuff in the first parentheses matches that in the last parentheses, so when we subtract the latter from the former, we get zero. We are left with only the terms containing h.

... f(x+h) -f(x) = 2xh -2h +h²

To finish up this problem, we need to divide this numerator value by the denominator h.

... (f(x+h) -f(x))/h = (2xh -2h +h²)/h

... = (2xh)/h -(2h)/h +h²/h

... = 2x -2 +h . . . . . this is the value of the expression

... (f(x+h) -f(x))/h = 2x -2 +h

4 0
3 years ago
Which expression is equivalent to 21 × 7?
madreJ [45]
7 x 21 is equivalent to 21 x 7
also 3 x 49
7 0
3 years ago
10,25,35,45... What's the pattern?
Bumek [7]

Answer:

15

Step-by-step explanation:

The pattern is going by 15 because 10+15=25 and then continue going.

7 0
3 years ago
el teatro tiene 20 filas de asientos con 18 asientos en cada fila. Los boletos cuestan $5.00. El costo si se vende todos los asi
ziro4ka [17]
El costo sería $1,800
3 0
3 years ago
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