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masha68 [24]
3 years ago
15

Please help guys! Will give brainliest!

Mathematics
1 answer:
Savatey [412]3 years ago
3 0

Answer:

55

Step-by-step explanation:

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Which trinomial is equivalent to (3x-2)(x+4)
Vinil7 [7]
(3x-2)(x+4)=\\
3x^2+12x-2x-8=\\
3x^2+10x-8
6 0
3 years ago
The average time customers spent on the American Greetings Web site has been 11.85 minutes (Top Web Properties, USA Today, April
Helen [10]

Answer: ± 1.96

Step-by-step explanation:

Given the following :

Mean (m) time spent = 11.85

Standard deviation = 4 minutes

Since the population of site visits is Normally distributed, Hence, the test statistic will follow a normal distribution :

The test the hypothesis that mean time has changed at 0.05 confidence interval

Normal distributions have a mean value of 0 and standard deviation of 1

Using a two tailed test At 0.05 confidence interval ;

Using the critical value calculator, which in general under normal distributions :

0.05% confidence interval for a two tailed test is

± 1.96

5 0
3 years ago
7|r+5|-2=12 what is the formula? Solve the equation.
SIZIF [17.4K]

Start with

7|r+5|-2=12

Add 2 to both sides:

7|r+5|=14

Divide both sides by 7:

|r+5|=2

Which is true if

r+5=\pm 2

If we choose the positive alternative, we have

r+5=2 \iff r=3

Otherwise, we have

r+5=-2 \iff r=-7

6 0
3 years ago
Which table represents a function?
Zina [86]

Answer:

choice d

Step-by-step explanation:

I hand this question

5 0
2 years ago
As part of an activity during math class, Kiera has to select a secret number containing 3 different digits from 1 to 4. How man
Alenkasestr [34]

Answer:

24.

Step-by-step explanation:

The is the number of permutations of 3 digits from 4

= 4P3

= 4! / (4- 3)!

= 4 *3 *2 *1 / 1!

= 24/1

= 24.

8 0
3 years ago
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