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LiRa [457]
2 years ago
14

Find the x-coordinates of the points where the graph crosses the x-axis:

Mathematics
1 answer:
ruslelena [56]2 years ago
3 0

Answer:

29.  (5,0) and (-7/2,0)

30.  (-1,0) and (5/7,0)

Step-by-step explanation:

29. y=2x² - 3x - 35

      y = (x-5)(2x+7)

y is 0 at x = 5 and -(7/2)

31: y=-7x² - 2x + 5

    y =  -(x+1)(7x-5)

y is 0 at -1 and 5/7

See the attached graph.

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24 divided by the product of 6 and 2
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Answer:

2

Step-by-step explanation:

Well, the product of 6 x 2 is 12. and 24/12 is 2

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3 years ago
Read 2 more answers
Which postulate proves the two
Vanyuwa [196]

Answer:

D. none

Step-by-step explanation:

The figure shows two triangles. We see a right angle in each triangle. All right angles are congruent. One angle of one triangle is congruent to one angle of the other triangle. We are not given any other information about congruent sides or other congruent angles. Therefore, there is not enough information to prove the triangles are congruent.

Answer: none

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3 years ago
The points obtained by students of a class in a test are normally distributed with a mean of 60 points and a standard deviation
Paraphin [41]

Answer:

0.13% of students have scored less than 45 points

Step-by-step explanation:

Problems of normally distributed samples can be solved using 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.

In this problem, we have that:

\mu = 60, \sigma = 5

About what percent of students have scored less than 45 points?

This is the pvalue of Z when X = 45. So

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

Z = \frac{45 - 60}{5}

Z = -3

Z = -3 has a pvalue of 0.0013

0.13% of students have scored less than 45 points

3 0
4 years ago
Your baseball team has 16 players. Use the Distributive Property to write and simplify an expression for the total cost of buyin
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Step-by-step explanation:

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4 years ago
If a triangle is dilated with a scale factor of 3, how is the perimeter of the triangle changed?
ELEN [110]
It’s changed by the perimeter by 2/5
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