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2 years ago

5

What is the value of y? 1 2 7 8

1 answer:

SVETLANKA909090 [29]2 years ago

4 0

Answer:

7

Step-by-step explanation:

$8y+18=12y-10\\ 12y-8y=10+18\\ 4y=28\\ y=\frac{28}{4} \\ y=7$

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For a one-tailed test with a = .05 and a sample of n = 9, the critical value for the t statistic is t = 1.860.

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2 years ago

Solve and state any extraneous solutions

Mice21 [21]

$\frac{3x}{x - 1} + 2 = \frac{3}{x - 1}$

$\frac{3x}{x - 1} + \frac{2(x - 1) }{ x - 1} = \frac{3}{x - 1}$

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2 years ago

I need help. For khan academy. Explain if you can

olga55 [171]

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2 years ago

sladkih [1.3K]

We can see that

both lines intersects at origin

so, the solution is x=0 and y=0

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and then we can solve for x

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2 years ago

1.2, 3, 7.5, 18.75, ...<br><br> Which formula can be used to describe the sequence?

Nady [450]

Answer:

The formula is:

$a_n=1.2(\frac{5}{2})^{n-1}$

Step-by-step explanation:

The geometric sequences are those in which the division between the terms $a_{n + 1}$ and $a_n$ of the sequence are equal to a constant common reason called "r"

The geometrics secencias have the following form:

$a_n=a_1(r)^{n-1}$

Where $a_1$ is the first term of the sequence

In this sequence we have the following terms

1.2, 3, 7.5, 18.75

Then notice that:

$\frac{3}{1.2}=\frac{5}{2}\\\\\frac{7.5}{3}=\frac{5}{2}\\\\\frac{18.75}{7.5}=\frac{5}{2}$

Then:

$r=\frac{5}{2}$ and $a_1=1.2$

Finally the formula is:

$a_n=1.2(\frac{5}{2})^{n-1}$

5 0

3 years ago

Read 2 more answers