3 years ago

Find the equation of the line through the point (-7,0) and parallel to y=-0.3x+4.3.

Mathematics

1 answer:

solong [7]3 years ago

8 0

The answer is y = -0.3x - 2.1

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Solve the following equation for m.<br> F=mv^2 / r

aleksklad [387]

Answer:

Step-by-step explanation:

F = $\frac{mv^2}{r}$

mv² = Fr

m = $\frac{Fr}{v^2}$

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2 years ago

Angle 4=x+30 and angle 2=2x+15. Find the measure of angle 4

kvasek [131]

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Answer:

∠4 = 45°

Step-by-step explanation:

Angles 1, 2, and 4 are all congruent.

∠4 = ∠2

x +30 = 2x +15

15 = x . . . . . . . . . . . . . subtract x+15

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3 years ago

In monitoring lead in the air after the explosion at the battery factory, it is found that the amounts of lead over a 6 day peri

liubo4ka [24]

Answer:

The margin of error that corresponds to a 95% confidence interval is 4.96.

Step-by-step explanation:

We have the standard error(which is the same as the standard deviation of the sample), so we use the students t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. There are 6 days, so

df = 6 - 1 = 5

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 35 degrees of freedom(y-axis) and a confidence level of $1 - \frac{1 - 0.95}{2} = 0.975([tex]t_{0.975}$ ). So we have T = 2.5706