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2 years ago

Describe the location of the point having the following coordinates.

Mathematics

1 answer:

alex41 [277]2 years ago

6 0

Answer:

a graph can be divided into 4 quadrants.

a zero abscissa, means the point lies on the origin.

a negative ordinate means the point lies on the y axis in the third and fourth quadrants.

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Three consecutive integers have a sum of 132 . find the integers.

Jlenok [28]

N + n+1+n+2 = 132
3n = 129
n = 129/3 = 43 answer

the 3 integers are 43,44 and 45. Answer

5 0

3 years ago

The Highway Safety Department wants to study the driving habits of individuals. A sample of 40 cars traveling on a particular st

Ipatiy [6.2K]

Answer:

We need a sample size of at least 101

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.99}{2} = 0.005$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.005 = 0.995$ , so $z = 2.575$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

What sample size is needed to estimate the true average speed to within 2 mph at 99% confidence?

We need a sample of at least n.

n is found when M = 2. So

$M = z*\frac{\sigma}{\sqrt{n}}$

$2 = 2.575*\frac{7.8}{\sqrt{n}}$

$2\sqrt{n} = 2.575*7.8$

$\sqrt{n} = \frac{2.575*7.8}{2}$

$(\sqrt{n})^{2} = (\frac{2.575*7.8}{2})^{2}$

$n = 100.85$

Rounding up

We need a sample size of at least 101

8 0

3 years ago

Read 2 more answers

1.) Enter the missing numbers in the boxes to complete the table of equivalent ratios.

Allushta [10]

1. 2(10)
4(20)
6(30)
I only know the answer to number 1 sorry. :/

3 0

3 years ago

The slats on Venetian blinds are designed to remain parallel in order to direct the path of light coming in a window. In paralle

Darina [25.2K]

Answer:

A.) JH = 1 in

B.) GH = 3/4 in

C.) m∠F = 62°

D.) m∠J = 118°

Step-by-step explanation:

In a parallelogram, opposite angles are congruent, adjacent angles are supplementary, and opposite sides are congruent.

A.) JH = FG = 1 in

B.) GH = FJ = 3/4 in

C.) m∠F = m∠H = 62°

D.) m∠J = m∠G = 180° -62° = 118°

8 0

2 years ago

What is the answer to what X is?

solmaris [256]

Answer:

$x=3$

Step-by-step explanation:

By the exterior angle theorem,

$(45x)\degree=(57+x)\degree+(26x)\degree$

Group like terms and solve for x.

$45x-26x-x=57$

$19x=57$

Divide both sides by 19;

$x=3$

3 0

2 years ago

Read 2 more answers