2 years ago

Is (3,9) a solution of the system

Mathematics

1 answer:

Verdich [7]2 years ago

6 0

Yes it because any function can be a solution to any certain number of different systems

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X + 2 y is greater than or equal to negative 3

EastWind [94]

X+2y $\geq$ -3 that may be wrong

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3 years ago

8. Given the standard deviation of 16 for a population and a 95% confidence level, find the margin

Kazeer [188]

Answer:

4.0486

Step-by-step explanation:

The margin of error is calculated using $E=z_{\frac{\alpha}{2} }*\frac{\sigma}{\sqrt{n} }$

Where n=60 is the sample size and $\sigma=16$ is the population standard deviation.

The critical value corresponding to 95% confidence interval is $z_{\frac{\alpha}{2}}=1.96$

We substitute the values to obtain;

$E=1.96*\frac{16}{\sqrt{60} }$

$E=1.96*2.06559=4.0486$

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2 years ago

heavy rain in oxford caused the creek to rise. the creek rose 3 inches the first day, and each day twice as much as the previous

Fittoniya [83]

48 inches???

Step-by-step explanation:

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3 years ago

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WARRIOR [948]

Answer:

all rational

Step-by-step explanation:

find the square root then add to fraction

down below is a cheatsheet.

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2 years ago

Find X. Round to the nearest tenth if necessary.

storchak [24]

Answer:

3.2

Step-by-step explanation:

If there are 2 secont lines intersecting inside a circle like the picture shown, then the theorem tells us that <em>"the product of 2 segments of one secant line is equal to the product of 2 segments of other secant line"</em>

Thus, we can say that:

x * 10 = 8 * 4

10x = 32

x = 32/10

x = 3.2

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2 years ago