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astraxan [27]
3 years ago
7

0147:03

Mathematics
1 answer:
Nimfa-mama [501]3 years ago
4 0

Answer:

y ≥ x - 2 and x + 2y < 4

Step-by-step explanation:

There are two lines graphed.

The dotted line passes through (0,2) and (4,0), then:

<u>slope (m)</u>: (0 - 2)/(4 - 0) = -1/2

<u>y-intercept (b)</u>: 2

<u>equation</u>:

y = mx + b

y = -1/2x + 2

multiplying by 2 at both sides, we get

2y = -x + 4

x + 2y = 4

The inequality is x + 2y < 4 because points below this line are shaded and points on the line are not included.

The solid line passes through (0,-2) and (2,0), then:

<u>slope (m)</u>: (0 - (-2))/(2 - 0) = 1

<u>y-intercept (b)</u>: -2

<u>equation</u>:

y = x - 2

The inequality is y ≥ x - 2 because points above this line are shaded and points on the line are included.

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Verdich [7]

Answer:

S(x)=-0.4x+42

The value of S(50) is 22 in means the amount of sodium iodine in the mixture is 22 when 50 milliliters of the 20% solution used.

Step-by-step explanation:

It is given that a chemist working on a flu vaccine needs to mix a 20% sodium-iodine with a 60% sodium-iodine to obtain a 70-milliliter mixture.

Let x be the number of milliliters of the 20% sodium-iodine.

Number of milliliters of the 60% sodium-iodine = 70-x

The amount of sodium iodine in the mixture is 20% of x and 60% of (70-x).

S(x)=0.20x+0.60(70-x)

S(x)=0.2x+42-0.6x

S(x)=-0.4x+42

Therefore,the required function is S(x)=-0.4x+42.

Substitute x=50 in the above equation.

S(50)=-0.4(50)+42

S(50)=22

The value of S(50) is 22 in means the amount of sodium iodine in the mixture is 22 when 50 milliliters of the 20% solution used.

4 0
4 years ago
The radius of the large sphere is double the radius of the
valentinak56 [21]

Answer:

8

Step-by-step explanation:

just do the comparation

Vb : Vs

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Vb : Vs = rb³ : rs³

Vb : Vs = (2rs)³ : rs³

Vb : Vs = 8rs³ : rs³ (delete the r³ on both side)

Vb : Vs = 8 : 1

so Vb is 8 times larger in volume than the small one

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3 years ago
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shutvik [7]

Answer:

x = -4

Step-by-step explanation:

-5x-4x-2 = -8x+2 is the only one with a solution.

-5x-4x-2 = -8x+2

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x = -4

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3 years ago
please help mee!! will mark brainliest! "the Kuna Caveman football team won 75% of their games. If they won 9 games, how many ga
almond37 [142]

Answer:

12 games

Step-by-step explanation:

Let x be the number of games played

The y won 75% of the games played and that was 9

x * 75% = 9

Change to decimal form

x * .75 = 9

Divide each side by .75

x * .75 /.75 = 9/.75

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4 0
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sergeinik [125]

Answer:

y = \frac14 x - 4

Step-by-step explanation:

The slope is 1/4 since y increases 1 when x increases by 4 (you divide deltaY by deltaX).

Then, to make it go through (0,-4) you subtract -4.

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