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Furkat [3]
3 years ago
9

X+3, -2x^(2)-6x, 4x^(3)+12x^(2) what is the 8th term in this geometric sequence

Mathematics
1 answer:
seraphim [82]3 years ago
4 0

Answer:

  a8 = -128x^8 -384x^7

Step-by-step explanation:

The formula for the general term of a geometric sequence with first term a1 and common ratio r is ...

  an = a1·r^(n-1)

Here, we have a1 = (x+3) and r = (-2x^2-6x)/(x+3) = -2x. Then the 8th term is ...

  a8 = (x+3)(-2x)^(8-1)

  a8 = -128x^8 -384x^7

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mariarad [96]
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7 0
3 years ago
Solve for y: 4y = 30
Mashutka [201]

Answer: y = 7.5

Step-by-step explanation: To solve for <em>y</em> in this equation, we want to get <em>y</em> by itself on the left side of the equation.

Since <em>y</em> is being multiplied by 4, to get <em>y</em> by itself, we need to divide by 4 on the left side of the equation. Since we divided by 4 on the left side, we must also divide by 4 on the right side.

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8 0
3 years ago
a mixture of concrete is made up of sand and cement in a ratio of 5 : 3, How many cubic feet of each are needed to make 160 cubi
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3 years ago
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Solve for x: x^2-14x+52=7<br> PLEASE HAVE EXPLANATION AND I WILL MARK BRAINLIEST
ale4655 [162]

Answer:

x_1=9\\x_2=5

Step-by-step explanation:

To solve this problem, you must:

- Subtract 7 from  both sides of the equation:

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- Now, you can factor it. Choose two numbers whose sum -14 and whose product is 45. These numbers would be -9 and -5. Therefore, you obtain the following solution:

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3 years ago
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kakasveta [241]

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