3 years ago

Marvella writes the addition problem 5 + 6. Is this sum even or odd

Mathematics

2 answers:

Lemur [1.5K]3 years ago

6 0

Your answer is going to be odd

insens350 [35]3 years ago

3 0

The sum means to add. 5+6= 11 so it's an odd sum.

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Solve the equation. x2 18x 81 = 25 a. 14, 4 b. –4, –14 c. 14, –14 d. –4, 4

Snowcat [4.5K]

Answer:

The answer is the option B

$-4,-14$

Step-by-step explanation:

we know that

The formula to solve a quadratic equation of the form $ax^{2} +bx+c=0$ is equal to

$x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$x^{2}+18x+81=25$

$x^{2}+18x+56=0$

$a=1\\b=18\\c=56$

substitute in the formula

$x=\frac{-18(+/-)\sqrt{18^{2}-4(1)(56)}} {2(1)}$

$x=\frac{-18(+/-)\sqrt{100}} {2}$

$x=\frac{-18(+/-)10} {2}$

$x1=\frac{-18+10} {2}=-4$

$x2=\frac{-18-10} {2}=-14$

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jeyben [28]

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Step-by-step explanation:

Distribute the 5: 15x-5=40

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Divide 15 by both sides: 3

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Answer:

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Step-by-step explanation:

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