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ryzh [129]
3 years ago
7

Pls help only b,d, and f

Mathematics
1 answer:
Leya [2.2K]3 years ago
8 0
Solving for y right?

2y = 3x + 4 - x
2y = 2x + 4
y = 2x + 4 over 2
y = 2 (x + 2) over 2
y = x + 2


y - 3 = 2x - 6 over 2
y - 3 = 2(x - 3) over 2
y - 3 = x - 3
y = x


x - y - 2 = 2(2x + 1)
-y - 2 = 2(2x + 1) - x
-y = 2(2x + 1) - x + 2
y = -2(2x + 1) + x - 2
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1. The pollution level in the center of a city at 6 am is 30 parts per million and it
Nady [450]

Answer:

a) y(t) = 30 + 25t

b) The pollution level at 4 o'clock in the afternoon​ is of 280 parts per million.

Step-by-step explanation:

The pollution level in the center of a city at 6 am is 30 parts per million and it grows in linear fashion by 25 parts per million every hour.

This means that the pollution in t hours after 6 am is given by:

y(t) = 30 + 25t, which is the answer to question a.

b. The pollution level at 4 o'clock in the afternoon​

4 in the afternoon is 10 hours after 6 am, so this is y(10).

y(10) = 30 + 25*10 = 30 + 250 = 280

The pollution level at 4 o'clock in the afternoon​ is of 280 parts per million.

8 0
3 years ago
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Answer:

x = 36

Step-by-step explanation:

144 + x = 36

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3 years ago
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Two circles are concentric if they have the same center.
vaieri [72.5K]

The equation of the circle is (x - 4)² + (y - 6)² = 16. The correct option is the second option (x - 4)² + (y - 6)² = 16

<h3>Equation of a circle </h3>

From the question, we are to determine the equation of the circle

The equation of circle is given by

(x - h)² + (y - k)² = r²

Where (h, k) is the center

and r is the radius

From the given information,

The two circles are concentric

∴ (h , k) = (4, 6)

But the other circle has a radius that is twice as large

∴ r = 2 × 2

r = 4

Thus,

The equation of the circle becomes

(x - 4)² + (y - 6)² = 4²

(x - 4)² + (y - 6)² = 16

Hence, the equation which represents a circle that is concentric with the circle shown but has a radius that is twice as large is (x - 4)² + (y - 6)² = 16. The correct option is the second option (x - 4)² + (y - 6)² = 16

Learn more on Equation of a circle here: brainly.com/question/1506955

#SPJ1

8 0
2 years ago
Which number should each side of the equation 4/5x=8 be multiplied by too produce the equivalent equation of x= 10
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5/4   because 4/5x * 5/4 = x   and 8 * 5/4  = 10
5 0
3 years ago
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