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Aleksandr [31]
3 years ago
9

There are two question please help.

Mathematics
1 answer:
natima [27]3 years ago
5 0
7 , it’s x = 12 1/3, or in decimal form, 12.33. And at 8, it’s x = -6/11, or in decimal form, -0.54
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-x/11 - 13 = -1<br><br> ---<br> what does "x" equal
Vitek1552 [10]
-132 i think is the correct answer
4 0
3 years ago
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I NEED HELP WITH THIS (GEOMETRY)
denis23 [38]

Answer:

x=30

Step-by-step explanation:

5x+x=180

6x=180

x=30

5x=150

x=30

3x=90

2x=60

5 0
3 years ago
13 + 2v - 8 + 6 &gt; -7 - v please simplify and explain IN ONLY NUMBERS NO WORDS
insens350 [35]

Answer:

v > - 6

Step-by-step explanation:

13 + 2v - 8 + 6 > -7 - v (calculate the sum of difference)

= 11 + 2v>-7-v (move variable to the left-hand side and change its sign and move constant to the right-hand side and change its sign)

= 2v + v > - 7 - 11 (collect like items and calculate the difference)

= 3v>-18 (divide both sides of the inequality by 3)

=v > - 6

*in parentheses is written what to do to get the next number*

6 0
3 years ago
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Given that Sn = 1a + (n-1)d1
Ivanshal [37]

Answer:

d = (sn - 3)/9

Step-by-step explanation:

4 0
3 years ago
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A textbook company states that the average time a student needs to take a quiz from its book is 30 minutes with a standard devia
faltersainse [42]

Answer:

We conclude that her students, on average, do not take 30 minutes on the quiz, contrary to what the textbook company states.

Step-by-step explanation:

We are given;

Population mean; μ = 30 minutes

Population standard deviation; σ = 3 minutes

Sample size; n = 10

Sample mean; x¯ = 25

Significance level = 5% = 0.05

Let's define the hypotheses;

Null hypothesis; H0: μ = 30

Alternative hypothesis: Ha: μ ≠ 30

Let's find the test statistic;

z = (x¯ - μ)/(σ/√n)

z = (25 - 30)/(3/√10)

z = -5.27

From online p-value from z-score calculator attached using, z = -5.27, significance level = 0.05, two tailed hypothesis, we have;

p < 0.00001

This is less than the significance level, and so we will reject the null hypothesis and conclude that Her students, on average, do not take 30 minutes on the quiz, contrary to what the textbook company stated.

8 0
3 years ago
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