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choli [55]
3 years ago
12

Evaluate. (jk−1)÷j when j=−4 and k=−0.7 Enter your answer as a decimal in the box.

Mathematics
1 answer:
Helga [31]3 years ago
5 0

Answer:

(jk - 1) / j

jk = (-4 x -0.7) = 2.8

(2.8 - 1) / - 4

1.8 / -4 = -0.45

Answer is -0.45 when j = -4 and k = -0.7

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Eva8 [605]
Plot each point on a graph , then count how many you need to go up and then over in this case it is 8 over 1 then calculate the y int so y= 8x -25
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3 years ago
A random sample of 100 students was taken. Of the 100 students, 50 liked vanilla ice cream, 37 liked chocolate ice cream, and 13
tino4ka555 [31]

Answer:

444

Step-by-step explanation:

since 37/100 students liked chocolate you need to scale that data to the new data size and find thirty seven percent of 1200 which is 444

7 0
3 years ago
There were 200,000 animals of a certain species in 1980. Since then,this number has decreased by 4.5% each year. Approximately h
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Answer: Approximately 25187 animals of this species will be left in 2025

Step-by-step explanation:

We would apply the formula for exponential decay which is expressed as

y = b(1 - r)^x

Where

y represents the population of animals after x years.

x represents the number of years.

b represents the initial population of animals.

r represents rate of decay.

From the information given,

b = 200000

r = 4.5% = 4.5/100 = 0.045

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Therefore,

y = 200000(1 - 0.045)^45

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y = 25187

8 0
3 years ago
Read 2 more answers
Simplify the function. Than determine the key aspects of the function
Tom [10]

To simplify the function, we need to know some basic identities involving exponents.


1. b^(ax)=(b^x)^a=(b^a)^x

2. b^(x/d) = (b^x)^(1/d) = ((b^(1/d)^x)


Now simplify f(x), where

f(x)=(1/3)*(81)^(3*x/4)

=(1/3)(3^4)^(3*x/4) [ 81=3^4 ]

=(1/3)(3^(4*3*x/4) [ rule 1 above ]

=(1/3) (3^(3*x)

=(1/3)(3^(3x)) [ or (1/3)(27^x), by rule 1 ]



(A) Initial value is the value of the function when x=0, i.e.

initial value

= f(0)

=(1/3)(3^(3x))

=(1/3)(3^(3*0))

=(1/3)(3^0)

=(1/3)(1)

=1/3


(B) the simplified base base is 3 (or 27 if the other form is used)


(C) The domain for an exponential function is all real values ( - ∞ , + ∞ ).


(D) The range of an exponential function with a positive coefficient and without vertical shift is ( 0, + ∞ ).

8 0
3 years ago
A television newscaster from a 24-hour news station wants to estimate the number of hours per day its
svlad2 [7]

Answer:

B, using a sample of size 200

Step-by-step explanation:

just got it right

3 0
3 years ago
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