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3 years ago

PLEASE ANSWER + BRAINLIEST!!!!

Mathematics

1 answer:

pav-90 [236]3 years ago

3 0

The answer is D because it does not end up passing through another point. You can discover this by using the vertical line test.

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What are the solutions of x^2 = -7x-8

Vilka [71]

$Solution, solve\:for\:x,\:x^2=-7x-8\quad :\quad x=\frac{-7+\sqrt{17}}{2},\:x=\frac{-7-\sqrt{17}}{2}$

$Steps:$

$x^2=-7x-8$

$\mathrm{Add\:}8\mathrm{\:to\:both\:sides},\\x^2+8=-7x-8+8$

$\mathrm{Simplify},\\x^2+8=-7x$

$\mathrm{Add\:}7x\mathrm{\:to\:both\:sides},\\x^2+8+7x=-7x+7x$

$\mathrm{Simplify},\\x^2+7x+8=0$

$Solve\:with\:the\:quadratic\:formula,\\\mathrm{For\:}\quad a=1,\:b=7,\:c=8:\quad x_{1,\:2}=\frac{-7\pm \sqrt{7^2-4\cdot \:1\cdot \:8}}{2\cdot \:1},\\x=\frac{-7+\sqrt{7^2-4\cdot \:1\cdot \:8}}{2\cdot \:1}:\quad \frac{-7+\sqrt{17}}{2},\\x=\frac{-7-\sqrt{7^2-4\cdot \:1\cdot \:8}}{2\cdot \:1}:\quad \frac{-7-\sqrt{17}}{2}$

$\mathrm{The\:final\:solutions\:to\:the\:quadratic\:equation\:are:},\\x=\frac{-7+\sqrt{17}}{2},\:x=\frac{-7-\sqrt{17}}{2}$

$\mathrm{Hope\:This\:Helps!!!}$

$\mathrm{-Austint1414}$

7 0

4 years ago

Solve each problem as indicated. Type your answer in the box. Do not use any spaces.

Vinil7 [7]

Hello.

Answer: -55. When adding two negatives, you add like you would any positive number.

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4 years ago

Help ASAP!<br> This is on functions on HRW.

Allushta [10]

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3 years ago

The product of a positive number and 14 more than seven times the number is 105. Find the two numbers. first number =______ and

Nostrana [21]

Let the positive number be $x$

The expression is
$x(14+7x)=105$ ⇒ expanding the bracket gives,
$14x+7 x^{2} =105$ ⇒ rearranging to equate one side to zero
$7x^{2} +14x-105=0$ ⇒ Dividing each term by 7 to simplify
$x^{2} +2x-15$ ⇒ Factorising gives
$(x+5)(x-3)=0$
$x=-5$ and $x=3$

Hence, the first number is -5 and the second number is 3

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4 years ago

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