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3 years ago

EASY POINTS PLZ HELP

Mathematics

1 answer:

Grace [21]3 years ago

4 0

Answer:

The age of the person who walked in the room is 44.

Step-by-step explanation:

The original mean age is 38 which means the total ages combined divided by the 5 people.

5 people x 38 (the mean age) = x

x = Total ages combined

x = 190 years old

Then another person came in, now totaling 6 people, and the mean age changed to 39 years old, an increase.

6 people x 39 (the new mean age) = y

y = Total ages combined

y = 234 years old

So, we are trying to figure out the age of the new person who came in. We have to subtract the new total age (y) by the original total age (x).

y - x = Age of new person in room

234 years old - 190 years old =

44 years old

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A parallel circuit consists of two capacitor c1=10mF and c2=15mF what is the total Capacitance

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8. For each function, find ordered pairs for x = -2, x = 5,2x=and x=0.75. Create tables of values.31a. y=9 - 4xb. y =х

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We need to check the ordered pairs for x = -2, x=5, x= 2/3 and x = 0.75.

1. For the first function: y = 9-4x

x=-2

$\begin{gathered} y=9-4\cdot(-2) \\ y=9+8 \\ y=17 \end{gathered}$

The ordered pair is (-2,17).

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$\begin{gathered} y=\text{ 9-4}\cdot(5) \\ y=9-20 \\ y=-11 \end{gathered}$

The ordered pair is (5,-11).

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$\begin{gathered} y=9-4\cdot(\frac{2}{3}) \\ y=9-\frac{8}{3} \\ y=\frac{27-8}{3} \\ y=\frac{19}{3} \end{gathered}$

The ordered pair is (2/3, 19/3)

x = 0.75

$\begin{gathered} y=9-4\cdot(0.75) \\ y=9-3=6 \end{gathered}$

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