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Deffense [45]
2 years ago
9

(a) Find the slope of the line through (-9, -7) and (-19. -47).

Mathematics
2 answers:
wariber [46]2 years ago
5 0
Y2-y1/x2-x1= -47-(-7)/-19-(-9)= 4
Marta_Voda [28]2 years ago
3 0

Answer:

4

Step-by-step explanation:

The equation for slope is:

Slope = \frac{y_2-y_1}{x_2-x_1}

We can plug in the given points into the equation:

Slope = \frac{-47-(-7)}{-19-(-9)}=\frac{-47+7}{-19+9}=\frac{-40}{-10}=4

The slope is 4

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Helpppp me i dont understand this and i need the answer fast <3
NikAS [45]

Answer:

it would be -4.5

Step-by-step explanation:

cause thats the middle

5 0
2 years ago
At the end of the summer a store marks down the outdoor furniture 8% a family bought 4 chairs in June at 35$ each then 2 more ch
frosja888 [35]

Answer:

$204.4

Step-by-step explanation:

The four chairs bought in June cost $35 each, all together $140. Then they bought 2 more chairs on sale for 8% off of $35 each or 92% of $35 which is $32.2 each, all together $64.4. Both buy's together would then equal $204.4

7 0
3 years ago
Suppose your statistics professor reports test grades as​ z-scores, and you got a score of 2.49 on an exam. ​(a) Write a sentenc
Oduvanchick [21]

Answer:

a) A z-score of 2.49 means that your grade was 2.49 standard deviations above the mean of all grades.

b) 1.39% of the class scored lower than your​ friend.

Step-by-step explanation:

Problems of normally distributed samples are 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.

You got a score of 2.49 on an exam. ​

(a) Write a sentence explaining what that means

A z-score of 2.49 means that your grade was 2.49 standard deviations above the mean of all grades.

(b) Your friend got a​ z-score of negative 2−2. If the grades satisfy the Nearly Normal​ Condition, about what percent of the class scored lower than your​ friend? ​

This percentage is the pvalue of Z = -2.2

So 0.0139 = 1.39% of the class scored lower than your​ friend.

7 0
3 years ago
a bowl of candies contains the following makeup of colors: 4 red, 2 yellow, 5 green, and 1 purple. taina is selecting a candy at
Ivanshal [37]

<u>Candies</u>

4 red

2 yellow

5 green

1 purple

- Taina doesn't like red candies.

4/4+2+5+1 = 4/12

4/12 is the probability Taina <em>will</em> get a red candy, but we're looking for the opposite.

12/12 - 4/12 = 8/12 = 2/3

The probability Taina will not select a red candy is 2/3.

8 0
2 years ago
4. Sarah had 731 Matchbox cars. She
devlian [24]

Answer:

  82 boxes

Step-by-step explanation:

731/9 = 81 2/9

If Sarah uses 81 boxes, she will have 2 cars left over.

Sarah needs 82 boxes to hold all of her cars.

5 0
2 years ago
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