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Goryan [66]
3 years ago
6

How to do this problem

Mathematics
1 answer:
avanturin [10]3 years ago
5 0

Answer: a. y=3      slope = 0

b. x=-4 slope does not exist

Step-by-step explanation:

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1 5.4.3 Test (CST): Exponents and Exponential Functions
ZanzabumX [31]

Answer:

f(-4) = ⅑

Step-by-step explanation:

Given

f(x) = 9(3)^x

Required.

Find f(-4)

f(x) = 9(3)^x

Substitute -4 for x

f(-4) = 9(3)^(-4)

Apply laws of indices

f(-4) = 9 * 1/(3⁴)

f(-4) = 9 * (⅓)⁴

f(-4) = 9 * 1/81

f(-4) = 9/81

Simplify

f(-4) = ⅑

5 0
3 years ago
Three airlines serve a small town in Ohio. Airline A has 48% of all scheduled flights, airline B has 26% and airline C has the r
kozerog [31]

Answer:

0.5969 = 59.69% probability that it was a flight of airline A

Step-by-step explanation:

Conditional Probability

We use the conditional probability formula to solve this question. It is

P(B|A) = \frac{P(A \cap B)}{P(A)}

In which

P(B|A) is the probability of event B happening, given that A happened.

P(A \cap B) is the probability of both A and B happening.

P(A) is the probability of A happening.

In this question:

Event A: Left on time.

Event B: From airline A.

Probability of a flight leaving on time:

81% of 48%(airline A).

61% of 26%(airline B)

40% of 26%(airline C). So

P(A) = 0.81*0.48 + 0.61*0.26 + 0.40*0.26 = 0.6514

Probability of leaving on time and being from airline A:

81% of 48%. So

P(A \cap B) = 0.81*0.48 = 0.3888

What is the probability that it was a flight of airline A?

P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.3888}{0.6514} = 0.5969

0.5969 = 59.69% probability that it was a flight of airline A

6 0
3 years ago
Use Gauss-Jordan elimination to solve the following linear system:
Olenka [21]
-3x + 4y = -6

20x - 4y = 40
-----------------------
17x = 34

x = 2

5(2) - y = 10

10 - y = 10

y = 0

the correct answer is D. (2,0)
4 0
3 years ago
Read 2 more answers
The ratio in a classroom is 5:4 <br> How many girls are there if there are 27 students?
kvasek [131]

Answer:

the answer depends if the ratio is 5 the answer is 15

if the ratio is 4 the answer is 12

Step-by-step explanation:

first add the ratios-5+4=9x

27 students

x=27/9=3

3*4 =12 or 3*5=15


please thank and mark brainliest if this helps!

4 0
4 years ago
A sum of money is placed at simple interest for 3 years at 10% annum and then the amount is invested for 3 years at the same rat
fgiga [73]

Answer:

Initial principal -$300,000

Investment amount after yr 3-$390,000

Final investment amount, after 6 yrs-$519,090

Step-by-step explanation:

Let X be the amount initially invested.

#The amount after 3 yrs of simple interest is calculated as:

I=PRT\\\\A=P+I\\\\A=X+X\times 0.1\times 3\\\\A=1.3X

#The amount after 5 yrs is calculated by compounding the amount after 3 yrs for 2 yrs at 10%:

A=P(1+i)^2\\\\471900=1.3X(1.1)^2\\\\471900=1.573X\\\\X=300000

Hence, the amount initially invested as $300,000

#Amount of invested after 6 yrs is therefore:

A=P(1+i)^n\\\\=471900\times1.1\\\\=519090

Hence, the total amount of the investment after 6 yrs is $519,090

#Substitute X in simple interest equation to find amount after 3 yrs of simple interest:

I=PRT\\\\A=P+I\\\\A=X+X\times 0.1\times 3\\\\A=1.3X\\\\=1.3\times 300000\\\\=390000

Hence, the total amount of the investment after first 3 yrs is $390,000

3 0
4 years ago
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