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larisa86 [58]
3 years ago
14

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

Mathematics
1 answer:
sweet-ann [11.9K]3 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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2 years ago
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Vitek1552 [10]
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3 years ago
Ms. Moneyhun's son, Sam, just learned to crawl. He can crawl 20 ft in one minute. How many feet can Sam crawl in one hour? (Hint
almond37 [142]

Answer:

1200 ft in one hour

Step-by-step explanation:

The ratio of Sam crawling 20 ft in one minute can be written as:

20:1

Multiply the ratio by 60 to get the minutes to 60 minutes, because there are 60 minutes in an hour:

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To get:

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6 0
3 years ago
65= t - 5 - 7 what is t
Nookie1986 [14]

Answer: t = 77

Step-by-step explanation:

    To solve for t, we will simplify and isolate the variable.

Given:

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7 0
2 years ago
Read 2 more answers
The ratio of the measures of three angles is 3:8:9. find the measure of each angle of the triangle.
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To solve this problem you must apply the proccedure shown below:

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2. The sum of the interior angle of a triangle is 180degrees

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4. Therefore, the measure of each angle is:

3(9)=27degrees\\ 8(9)=72degrees\\ 9(9)=81degrees

The answer is: 27degrees, 72degrees,81degrees

6 0
3 years ago
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