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Alla [95]
3 years ago
7

Subtract 9x^2 - 7x from -4x^2 + 6

Mathematics
1 answer:
Rzqust [24]3 years ago
8 0

Answer:

13x^2 - 7x + 6

Step-by-step explanation:

(9x^2 -7x) - 1(-4x^2 + 6)

(9x^2 -7x) + 4x^2 +6

9x^2 - 7x + 4x^2 + 6

(9x^2 + 4x^2) - 7x + 6

13x^2 - 7x + 6

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List two equivalent numbers to 0.50
ad-work [718]
1/2, 4/8. If in decimal form, you can also do 0.5 or 0.500
8 0
2 years ago
Let X = the time between two successive arrivals at the drive-up window of a local bank. If X has an exponential distribution wi
LuckyWell [14K]

Answer:

a) E(X)=1

b) σ=1

c) P(X>1)=0.368

d) P(2<X<5)=0.128

Step-by-step explanation:

We have X: "the time between two successive arrivals at the drive-up window of a local bank", exponentially distributed with λ = 1.

a) We have to compute the expected time between two successive arrivals.

The expected value for X as it is exponentially distributed is:

E(X)=\dfrac{1}{\lambda}=\dfrac{1}{1}=1

b) We have to compute the standard deviation of X.

The standard deviation is calculated as:

\sigma=\dfrac{1}{\lambda}=\dfrac{1}{1}=1

c) The probability that X is larger than 1 (P(X>1))

We can express the probability as:

P(X>t)=e^{-\lambda t}\\\\P(X>1)=e^{-\lambda\cdot 1}=e^{-1}=0.368

d) The probability that X is between 2 and 5 (P(2<X<5))

P(X>t)=e^{-\lambda t}\\\\\\P(25)\\\\P(2

4 0
3 years ago
Find all vertical and horizontal asymptotes of the graph of the function. (Enter your answers as a comma-separated list.)
Vladimir79 [104]
Hello,

y=(1+x)/(1-x)

y=-1
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x=1
Asymptote vertical $ \lim_{x \to 1}  \frac{1+x}{1-x}=\infty$


3 0
3 years ago
What is the slope to this line?
Artyom0805 [142]

Answer:

hello :

Hello : let  A(1,0)    B(0,2)  in this line

the slope is :   (YB - YA)/(XB -XA)




5 0
3 years ago
An experiment was conducted by some students to explore the nature of the relationship between a person's heart rate (measured i
tekilochka [14]

Answer:

A. factors.

Step-by-step explanation:

The correct option is - A. factors.

Reason -

The variables "stepping rate" and "step height" are the factors because a activity is performed in which stepping at one of the three stepping rates at one of the two possible heights for three minutes.

The activity is based on both the variables stepping rate and step height.

6 0
3 years ago
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