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vitfil [10]
3 years ago
9

Which is the equation of a line that has a slope of -2/3 ans passes through the point (-3, -1)

Mathematics
1 answer:
kupik [55]3 years ago
5 0

Answer:

see explanation

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

here m = - \frac{2}{3}, hence

y = - \frac{2}{3} x + c ← is the partial equation

To find c substitute (- 3, - 1) into the partial equation

- 1 = 2 + c ⇒ c = - 1 - 2 = - 3

y = - \frac{2}{3} x - 3 ← is the equation of the line

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Alexia ran 3 laps around her neighborhood. Each lap is 1 3/8 miles. How many miles did Alexia run? find your answer using additi
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4 1/2

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2 years ago
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When you divide me by 5,remainder is 4.
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Clue one tells you it ends in a 4 or 9.
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3 years ago
plz help In Alexis’ English class, 21 students completed an essay by the due date. There are 30 students in Alexis’ English clas
yarga [219]

Answer:

70%

Step-by-step explanation:

I'm sorry but I don't really know how to explain it other than 70% of 30 is 21 so that means that 30% of the students turned their essay in on time.

(sorry for not being able to explain it but I hope it helped)

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SAT scores are distributed with a mean of 1,500 and a standard deviation of 300. You are interested in estimating the average SA
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Answer:

I should use at least 304 students

Step-by-step explanation:

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E = 40

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3 0
3 years ago
The number of bacteria in a refrigerated food product is given by N ( T ) = 22 T 2 − 123 T + 40 , 6 < T < 36 , where T is
antoniya [11.8K]

Answer:

N(T(t)) = 1408t^2 - 385.6t - 105.52

Time for bacteria count reaching 8019: t = 2.543 hours

Step-by-step explanation:

To find the composite function N(T(t)), we just need to use the value of T(t) for each T in the function N(T). So we have that:

N(T(t)) = 22 * (8t + 1.7)^2  - 123 * (8t + 1.7) + 40

N(T(t)) = 22 * (64t^2 + 27.2t + 2.89) - 984t - 209.1 + 40

N(T(t)) = 1408t^2 + 598.4t + 63.58 -  984t - 169.1

N(T(t)) = 1408t^2 - 385.6t - 105.52

Now, to find the time when the bacteria count reaches 8019, we just need to use N(T(t)) = 8019 and then find the value of t:

8019 = 1408t^2 - 385.6t - 105.52

1408t^2 - 385.6t - 8124.52 = 0

Solving this quadratic equation, we have that t = 2.543 hours, so that is the time needed to the bacteria count reaching 8019.

4 0
3 years ago
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