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3 years ago

Helppppppppppppppppppppppppppppppppp

Mathematics

2 answers:

leva [86]3 years ago

8 0

I think the answer is B

seraphim [82]3 years ago

5 0

Answer:

b. (1, 13).

Step-by-step explanation:

Here's a pic of my work. You can put either equation on the other side of the equal sign, because they both equal Y. therefore, they equal each other.

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Answer:

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Step-by-step explanation:

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Solve for x in the equation.

labwork [276]

Answer:

The solution is $\displaystyle x=1\pm \sqrt{47}$ . Fourth option

Explanation:

Solve for x:

$2x^2+3x-7=x^2+5x+39$

Move all the terms from the right to the left side of the equation, a zero in the right side:

$2x^2+3x-7-x^2-5x-39=0$

Join all like terms:

$x^2-2x-46=0$

The general form of the quadratic equation is:

$ax^2+bx+c=0$

Solve the quadratic equation by using the formula:

$\displaystyle x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

In our equation: a=1, b=-2, c=-46

Substituting into the formula:

$\displaystyle x=\frac{-(-2)\pm \sqrt{(-2)^2-4(1)(-46)}}{2(1)}$

$\displaystyle x=\frac{2\pm \sqrt{4+184}}{2}$

$\displaystyle x=\frac{2\pm \sqrt{188}}{2}$

Since 188=4*47

$\displaystyle x=\frac{2\pm \sqrt{4*47}}{2}$

Take the square root of 4:

$\displaystyle x=\frac{2\pm 2\sqrt{47}}{2}$

Divide by 2:

$\displaystyle x=1\pm \sqrt{47}$

First option: Incorrect. The answer does not match

Second option: Incorrect. The answer does not match

Third option: Incorrect. The answer does not match

Fourth option: Correct. The answer matches exactly this option

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2 years ago

A boxer is put on a diet to gain 20 lb in four weeks. The boxer gains 4 1/3 lb the first week and 5 5/6 lb the second week. How

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4 1/3 + 5 5/6= 10 1/6

20 - 10 1/6 = 9.8

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3 years ago

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144.

distributive property distributed a number outside of a parenthesis inside, i.e. x(12•12).

considering there is no given parenthesis, the answer is simply 144.

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B.90 because 90 degrees is above the original angel

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