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3 years ago

How to find a slope

Mathematics

1 answer:

SCORPION-xisa [38]3 years ago

6 0

Answer:

below

Step-by-step explanation:

rise÷run

dalta y ÷ dalta x (from table ofvalues)

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I need help with Precal asap !!!! I’ll mark u as brainliest, please if you don’t know the correct answer don’t write down.

Amanda [17]

Answer:

Equation 1: r = 4 +( 3 * cos theta )

Equation 2: r = sqrt ( 5² * sin(2 theta) )

Step-by-step explanation:

GRAPH 1:

The first graph is a dimpled limacon.

General equation for dimpled limacon:

r = a + b cos theta ∴ if dimple is along the x- axis

r = a + b sin theta ∴ if dimple is along the y-axis

y-intercept : { a, -a } = { 4, -4 } ∴ the points at which limacon intersects y-axis

Negative side of x-axis = ( a – b ) ⇒ 1

Positive side of x-axis = ( a + b ) ⇒ 7

Subtract the value of a from sum of a and b to find b:

b = 7 – 4 ⇒ 3

Equation1: r = 4 +( 3 * cos theta )

GRAPH 2:

The second graph is a lemniscates.

General equation for lemniscates is:

r² = a² cos(2theta) ∴ if petals of graph are on coordinate axis

r² = a² sin(2 theta) ∴ if petals of graph are not on coordinate axis

now, according to the graph:

a = 5 ⇒ a² = 25

angle of graph: cos2θ, simply divide 360° by 2:

$\frac{360}{2}$ ⇒ 180°

The petals cannot be on coordinate axis, we start from 45° and then the next petal will be on:

45° + 180° = 225°

Since the graph is not on the coordinate axis, so

r² = 5² sin(2 theta) ⇒ r = sqrt ( 5² * sin(2 theta) )

Equation 2: r = sqrt ( 5² * sin(2 theta) )

6 0

3 years ago

Click on all items which will cause a decrease in the cost of an auto insurance policy.

ololo11 [35]

The answers for this question are 2 , 3 , and 5. these 3 make the most sense.

6 0

3 years ago

Read 2 more answers

Determine whether it is reasonably possible that the proportion of adults from country a and the proportion of adults from count

viva [34]

It is possible that the proportion of adults in Country A equal to the proportion of adults in Country B. This statement does not necessarily mean that the populations of adults in the two countries are equal. It is the proportion and not the exact population. This occurs when the ratio of the population of adults to the total population of Country A is the same as that of the ratio of the population of adults to the total population of Country B.

3 0

4 years ago

In a sample of 1000 cases, the mean of a certain test is 14 and the standard deviation is 2.5. Assume the distribution to be nor

Maslowich

Answer:

The top 20% of the students will score at least 2.1 points above the mean.

Step-by-step explanation:

When the distribution is normal, we use the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

The mean of a certain test is 14 and the standard deviation is 2.5.

This means that $\mu = 14, \sigma = 2.5$