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andreyandreev [35.5K]
3 years ago
14

Factor the quadratic by checking factor pairs. -15x2 – 21x + 18 -15x2 – 218 + 19 = -3

Mathematics
1 answer:
d1i1m1o1n [39]3 years ago
3 0

Answer:

-3(x + 2)(5x - 3)

Step-by-step explanation:

-15x² – 21x + 18

-3(5x² + 7x - 6)

-3[5x² + 10x - 3x - 6]

-3[5x(x + 2) - 3(x + 2)]

-3(x + 2)(5x - 3)

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The variable, y, varies directly with x. if y = 20 when x = 25, what is y when x = 43? Also please explain so I can understand t
Gwar [14]

Answer:

25

Step-by-step explanation:

4 0
2 years ago
Factor 3x^3 - 15x^2 + 18x.
Usimov [2.4K]

Step-by-step explanation:

3 x^3-15x^2+18x 3(x^3-5x^2+6x)

8 0
2 years ago
Heather counted the number of crickets in her greenhouse every month and recorded the data in the table below.
skelet666 [1.2K]

Answer: Its B

Step-by-step explanation:

I did this test and got it right

7 0
3 years ago
Read 2 more answers
What is the length of the segment connecting the points A(1,3) and B(6,5)?
Natalija [7]

Answer:

The answer is

<h2>\sqrt{29}  \:  \:  \: or \:  \:  \:5.38 \:  \:  \: units</h2>

Step-by-step explanation:

The length of the segment connecting two points can be found by using the formula

d =  \sqrt{ ({x1 - x2})^{2} +  ({y1 - y2})^{2}  }  \\

where

(x1 , y1) and (x2 , y2) are the points

From the question the points are

A(1,3) and B(6,5)

The length is

|AB|  =  \sqrt{ ({1 - 6})^{2} +  ({3 - 5})^{2}  }  \\  =  \sqrt{ ({ - 5})^{2}  + ( { - 2})^{2} }  \\  =  \sqrt{25 + 4}  \\  =  \sqrt{29}

We have the final answer as

\sqrt{29}  \:  \:  \: or \:  \:  \:5.38 \:  \:  \: units

Hope this helps you

3 0
3 years ago
eduardo has 4 1/2 yard of rope light. Exactly how many more yard does he need to finish the car's ceiling
Over [174]

Answer:

2 1/6

Step-by-step explanation:

Because the denominators are different, and there are whole numbers involved, then first make the fractions improper.

4 1/2 -> 9/2

6 2/3 -> 20/3

Next, make the denominators the same by multiplying each fraction by the denominator of the other.

9/2 * 3 = 27/6

20/3 * 2 = 40/6

Then you can subtract the numerators because the denominators are the same:

40/6-27/6= 13/6

Then you can convert to a mixed fraction if need be.

3 0
2 years ago
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