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2 years ago

Which of the following quadratic equations has the solution set (-20,9)? SELECT ALL THAT APPLY

Mathematics

1 answer:

sweet-ann [11.9K]2 years ago

6 0

<h3>Answer:</h3>

A, F

<h3>Step-by-step explanation:</h3>

When the roots are a and b, the factors are (x-a) and (x-b). For roots -20 and 9, the factors are (x+20) and (x-9).

This selects answer A and eliminates choices B and C.

___

Multiplying the two factors gives ...

... (x +20)(x -9) = x² +11x -180

This selects answer F and eliminates choices D and E.

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Given the Arithmetic sequence A1,A2,A3,A4 53, 62, 71, 80 What is the value of A38?

Murrr4er [49]

Answer:

$A_{38} = 350$

Step-by-step explanation:

The 5th term of the arithmetic sequence is 53. We can write the equation:

$a + 4d = 53...(1)$

The 6th term of the arithmetic sequence is 62. We can write the equation:

$a + 5d = 62...(2)$

Subtract the first equation from the second one to get:

$5d - 4d = 62 - 53$

$d = 9$

The first term is

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$a + 36 = 53$

$a = 53 - 36$

$a = 17$

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$A_{38} = a + 37d$

$A_{38} = 17+ 37(9)$

$A_{38} = 350$

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2 years ago

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Step-by-step explanation:

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2 years ago

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n200080 [17]

y < –12

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To find the solution to the inequality.

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shusha [124]

Answer:

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Step-by-step explanation:

There's not really much work that goes into this problem.

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<em />

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