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4 years ago

Slope of (9,-3) and (9,-8)

Mathematics

2 answers:

notsponge [240]4 years ago

7 0

Answer:

It is undefined

Step-by-step explanation:

The points both go in a vertical direction.

earnstyle [38]4 years ago

6 0

Answer:

Infinity

Step-by-step explanation:

Slope = y2 - y1/x2 - x1

Given

x1 = 9

y1 = -3

x2 = 9

y2 = -8

Therefore

Slope = -8 -(-3) /9 - 9

= -8 + 3 /9 - 9

= -5/0

= infinity

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Solve for x x + 6=18

Verizon [17]

X=12

This is because you subtract 6 from both sides to get the x isolated.

So x=18-6

x=12 :)

6 0

3 years ago

Write the exponent for the expression. 4x4

Jobisdone [24]

Answer: 4²

Explanation: First, we count the number of 4's to

find that we have 2 factors of 4.

So to write this problem in exponential form, we use a base

of 4 and an exponent of 2 which can be read as "4 to the 2nd power."

3 0

3 years ago

Read 2 more answers

What is seven more than six times a number y

cricket20 [7]

6y + 7 I don't know if that's what you're looking for

3 0

3 years ago

Alma is estimating the proportion of students in her school district who, in the past month, read at least 1 book. From a random

Maurinko [17]

Answer:

$(0.64 +1.645 \sqrt{\frac{0.64(0.36)}{50} })$

90 percent confidence interval for the proportion of all students in her district who read at least 1 book last month

(0.52846 , 0.75166)

Step-by-step explanation:

Step:-1

Given that the random sample size 'n' = 50

The sample proportion

$p^{-} = \frac{32}{50} = 0.64$

90 percent confidence interval for the proportion of all students in her district who read at least 1 book last month

$(p^{-} - Z_{0.90} \sqrt{\frac{p(1-p)}{n}, } , p^{-} +Z_{0.90} \sqrt{\frac{p(1-p)}{n} })$

Step(ii):-

Level of significance = 0.90

Z₀.₉₀ = 1.645

$(0.64 - 1.645 \sqrt{\frac{0.64(1-0.64)}{50}, } , 0.64 +1.645 \sqrt{\frac{0.64(1-0.64)}{50} })$

$(0.64 - 1.645 \sqrt{\frac{0.64(0.36)}{50}, } , 0.64 +1.645 \sqrt{\frac{0.64(0.36)}{50} })$

(0.64 -1.645(0.06788) , (0.64 + 1.645(0.06788)

(0.52846 , 0.75166)

Final answer:-

90 percent confidence interval for the proportion of all students in her district who read at least 1 book last month

(0.52846 , 0.75166)

5 0

3 years ago

Ellen types 205 words in five minutes. Which student has the same typing speed as Ellen?

Arada [10]

Answer:

B. Bradley

Step-by-step explanation:

We know that Ellen can type 205 words in 5 minutes. To start comparing to the other students, we need to find out how many words she can type per minute. We can divide 205 by 5 to get our answer.

$x=\frac{205}{5}$

$x=41$

Ellen can type 41 words per minute. To find our answer we must find how many words per minute the other students can type. Lets start with the first and go down from there:

Alissa:

$x=\frac{220}{20}$

$x=11$

It can't be Alissa.

Bradley:

$x=\frac{328}{8}$

$x=41$

Your answer is B. Bradley

6 0

4 years ago