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3 years ago

Please hurry I’m being timed! (50 pts)

Mathematics

2 answers:

photoshop1234 [79]3 years ago

8 0

Answer:

Step-by-step explanation:

An excluded value is any value of x that makes the denominator of the rational expression zero as this would make the expression undefined.

For expression A

$\frac{x-3}{x^2-4}$

The denominator will be zero when x² - 4 = 0

x² - 4 is a difference of squares, thus

(x - 2)(x + 2) = 0

x - 2 = 0 ⇒ x = 2

x + 2 = 0 ⇒ x = - 2

The excluded values of x are x = ± 2 ⇒ A

Ksju [112]3 years ago

7 0

Option A) is the answer

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Natasha_Volkova [10]

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2 years ago

22 - 10 + (18 ÷ 3) =

juin [17]

Follow PEMDAS (parenthesis- exponents (& roots) - multiplication - division - addition - subtraction)

18/3 = 6

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3 years ago

For which system of equations is (2, 2) a solution?

Eva8 [605]

Answer D.

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3 years ago

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3 years ago

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Uninhibited growth can be modeled by exponential functions other than A(t) =Upper A 0 e Superscript kt. For example, if an i

laila [671]

The question is incomplete. Here is the complete question.

Uninhibited growth can be modeled by exponential functions other than $A(t)=A_{0}e^{kt}$ . for example, if an initial population P₀ requires n units of time to triple, then the function $P(t)=P_{0}(3)^{\frac{t}{n} }$ models the size of the population at time t. An insect population grows exponentially. Complete the parts a through d below.

a) If the population triples in 30 days, and 50 insects are present initially, write an exponential function of the form $P(t)=P_{0}(3)^{\frac{t}{n} }$ that models the population.

b) What will the population be in 47 days?

c) When wil the population reach 750?

d) Express the model from part (a) in the form $A(t)=A_{0}e^{kt}$ .

Answer: a) $P(t)=50(3)^{\frac{t}{30} }$