3 years ago

How to complete the square of x^2+8x+15=0

Mathematics

1 answer:

earnstyle [38]3 years ago

6 0

Answer:

x= -3, -5

Step-by-step explanation:

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Which equation illustrates the Multiplicative Inverse Property? A. 0 • 16 = 0 B. 1(48) = 48 C. 3 • (1/3) = 1 D. 9(1 + 0) = 9(1)

Talja [164]

Answer:

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3 years ago

For their homecoming parade, the students of U-Math have created a colorful banner, 57 meters in length, that is made of two

BartSMP [9]

Answer:

$Length\ of\ the\ long\ piece=40\ meters\\\\Length\ of\ the\ short\ piece=17\ meters$

Step-by-step explanation:

Let be "s" the length in meters of the short piece and "l" the lenght in meters of the long piece.

Set up a system of equations:

$\left \{ {{s+l=57} \atop {s=l-23}} \right.$

Apply the Substitution Method to solve the system. Substitute the second equation into the first equation and solve for "l":

$(l-23)+l=57\\\\2l=80\\\\l=\frac{80}{2}\\\\l=40$

Susbstitute the value of "l" into the second equation in order to find the value of "s". This is:

$s=40-23\\\\s=17$

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3 years ago

The school paper charges $1.50 for an ad, plus 25 cents per word. Carl wants to spend only $12.00 on the ad.

statuscvo [17]

Answer:

42 words

Step-by-step explanation:

To solve just solve 0.25x +1.50 = 12.00 for x

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3 years ago

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The sum of 21 and twice a number is -19 what is the number

skelet666 [1.2K]

The correct answer would be -23

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2 years ago

3) Write the inequality that

masha68 [24]

Answer:

See below

Step-by-step explanation:

Owing represent a negative balance.

<u>So the inequality for this case is:</u>

- 26.00 > - 147.00

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2 years ago