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Reptile [31]
3 years ago
11

Correct answer to -3x-9=3

Mathematics
2 answers:
n200080 [17]3 years ago
7 0
27 is the answer to this question
ohaa [14]3 years ago
4 0
-3x = 3 + 9


-3x = 12


X= - 12 out of 3

X= -4

Hope this helps

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Please help me with this question. Please!
erica [24]
150=i^2
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between 12 and 13, D
8 0
3 years ago
Helpppppppp ion know how to do this
mr_godi [17]

Answer:

x = 34

Step-by-step explanation:

100 + 12 + x = 180

112 + x = 180

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X = 34

Have an amazing day!

Please mark brainliest!

7 0
2 years ago
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
2 years ago
Read 2 more answers
Need answer fast please
Leya [2.2K]

Answer:

c. -8

Step-by-step explanation:

5 0
2 years ago
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20% of __ = 18 Please help me Thank you Sooo Much
IgorLugansk [536]

Answer: 20% of 90 = 18

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3 years ago
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