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Aleks [24]
4 years ago
7

I know I need to use the change of base

Mathematics
1 answer:
Zinaida [17]4 years ago
7 0
The change of base formula looks like this:
                                           log x
(log to the base b of ) x = -----------    (you could also use ln instead of log)
                                            log b

                                                       log 40       1.602
Then (log to the base 7 of) 40 = ------------ = ------------- = 1.896   (answer)
                                                        log 7         0.8451

check (on calculator):    7^1.896 = 40.023   (close enough to 40 to verify 
                                                                     that this method "worked")
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What is the range of the function f(x)= square root of x-8+6
Shtirlitz [24]

Answer:

  • The range of the given function is  [6, + ∞)

Step-by-step explanation:

It is assumed the function is:

  • f(x)=\sqrt{x-8} +6

We know the square root is non-negative, so:

  • x - 8 ≥ 0  therefore the function gets values

  • f(x) ≥ 0 + 6
  • f(x) ≥ 6

We can show this as:

  • f(x) ∈ [6, + ∞)
8 0
2 years ago
Jasmine correctly determined the area of this parallelogram by adding the areas of the triangles and rectangle.
babymother [125]

Answer:

20

72

112

Step-by-step explanation:

Area of a triangle = 1/2 x base x width

⇒ area of each triangle = 1/2 x 5 x 8 = 20 m²

Area of rectangle = width x length

⇒ area of the rectangle = 8 x 9 = 72 m²

Total area = (2 x 20) + 72 = 112 m²

5 0
2 years ago
Gretchen made a paper cone to hold a gift for a friend. The paper cone was 15 inches high and had a
Softa [21]

Answer:

123b

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Given the set definitions below, find X Y. X = {100, 200} Y = {1,2}
Veseljchak [2.6K]
The Cartesian product of two sets can be defined as the following: the set of all possible pairs where the 1st coordinate is an element of the 1st set and the 2nd coordinate is the element of the 2nd set. This has an obvious generalization for n sets (the cartesian product has then n coordinates).
Let us pick now all the pairs that have 100 as their first coordinate. We then have 2 choices for the 2nd coordinate, 1 and 2. Hence, the 2 pairs are: (100,1), (100,2). Similarly, if 200 is the first coordinate, the pairs are (200,1), (200,2).
These 4 pairs are the cartesian product (we have 4 pairs =2 elements from X* 2 elements from Y) .
It helps to remember that the cartesian product has as many elements as the product of the number of elements of each set.
4 0
3 years ago
Find the equation of the line that passes through the points (6,1) and (3,4)
IrinaK [193]
(6,1) , (3,4)
slope = (4 - 1) / (3 - 6) = -3/3 = -1

y = mx + b
slope(m) = -1
use either of ur points....(6,1)...x = 6 and y = 1
now sub and find b, the y int
1 = -1(6) + b
1 = -6 + b
1 + 6 = b
7 = b

so ur equation is : y = -x + 7

8 0
3 years ago
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