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3 years ago

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Which ordered pair is the on the graph of the equation 2x+5y=4?

1 answer:

vredina [299]3 years ago

8 0

To determine which of the choices is lies on the line represented by the equation, 2x + 5y = 4, substitute the values of the abscissas to the x of the equation and solve for y. Evaluate if the y calculated is equal to the ordinate of the ordered pair. Calculations are shown below.

A. (7, -2) ; 2(7) + 5y = 4 ; y = -2 ; EQUAL
B. (0,-1) ; 2(0) + 5y = 4 ; y = 0.8 ; NOT EQUAL
C. (0,1) ; 2(0) + 5y = 4 ; y = 0.8 ; NOT EQUAL
D. (3, -2) ; 2(-3) + 5y = 4 ; y = 2 ; NOT EQUAL

Thus, the answer is letter A. (7, -2)

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Suppose you are repeating a classic study of starfish and their impact on the ecosystems of tide pools. Using historic data coll

Travka [436]

Answer:

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Step-by-step explanation:

Let X represent the number of starfish in the tide pool.

X follows a Poisson distribution with mean 6.4.

The formula for Poisson distribution is as follows.

$P(X=x) = e^{-6.4} * [6.4^{x} / x!] when x = 0, 1, ...$

$P(X = x) = 0$ otherwise

We need to find the probability that the number of starfish in the tide pool drops below 3.

Therefore, the required probability is:

P(X < 3) = P(X = 0) + P(X = 1) + P(X=2)

$P(X < 3) = e^{-6.4} + (e^{-6.4}*6.4) + (e^{-6.4}*6.4^{2}/2)$

P(X < 3) = 0.00166 + 0.01063 + 0.03403

P (X < 3) = 0.0463

4 0

3 years ago

Whats 3 to the power of zero? is it just 3

zepelin [54]

Answer:

$3^0 = 1$

Step-by-step explanation:

$a^0 =1 ,~~ a \neq 0$

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2 years ago

Albania is an Eastern European country that uses a currency called the Albanian Lek (ALL). Right now, $1 (1 USD) exchanges for 1

rosijanka [135]

Answer:

$9398.50

Step-by-step explanation:

Given

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Required

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We have:

$\$1 = 106.40\ ALL$

and

$\$x = 1000000\ ALL$

Cross Multiply

$x * 106.40 = 1 * 1000000$

$106.40x = 1000000$

Solve for x

$x = 1000000/106.4$

<em></em> $x = \$9398.50$ <em> -- Approximated</em>

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3 years ago

-3/4÷-1/2<br><br>pls help armieee

PilotLPTM [1.2K]

Answer:

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2 years ago

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NARA [144]

I think the answer would be the last one. a cylinder with radius 4 units.

3 0

2 years ago