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3 years ago

Please help! It's hard.. at least for me. XD

Mathematics

2 answers:

zlopas [31]3 years ago

5 0

I doubt it's 130. It has to be 75 or 50. I'd go with 75.

statuscvo [17]3 years ago

5 0

Answer:

THE ANSWER SHOULD BE 75 BRAINLIEST PLEASE

Step-by-step explanation:

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Solve The Complex Number System<br><br><img src="https://tex.z-dn.net/?f=x%5E%7B3%7D-125%3D0" id="TexFormula1" title="x^{3}-125=

Ganezh [65]

$\bf \textit{difference and sum of cubes} \\\\ a^3+b^3 = (a+b)(a^2-ab+b^2)~\hfill a^3-b^3 = (a-b)(a^2+ab+b^2) \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ x^3-125=0\implies x^3-5^3=0\implies (x-5)(x^2+5x+5^2)=0 \\\\[-0.35em] ~\dotfill\\\\ x-5=0\implies \boxed{x=5} \\\\[-0.35em] ~\dotfill\\\\ ~~~~~~~~~~~~\textit{quadratic formula}$

$\bf \stackrel{\stackrel{a}{\downarrow }}{1}x^2\stackrel{\stackrel{b}{\downarrow }}{+5}x\stackrel{\stackrel{c}{\downarrow }}{+25} \qquad \qquad x= \cfrac{ - b \pm \sqrt { b^2 -4 a c}}{2 a} \\\\\\ x=\cfrac{-5\pm\sqrt{5^2-4(1)(25)}}{2(1)}\implies x=\cfrac{-5\pm\sqrt{25-100}}{2} \\\\\\ x=\cfrac{-5\pm\sqrt{-75}}{2}~~ \begin{cases} 75=&3\cdot 5\cdot 5\\ &3\cdot 5^2 \end{cases}\implies x=\cfrac{-5\pm\sqrt{-3\cdot 5^2}}{2}$

$\bf x=\cfrac{-5\pm 5\sqrt{-3}}{2}\implies x=\cfrac{-5\pm 5\sqrt{-1\cdot 3}}{2}\implies x=\cfrac{-5\pm 5\sqrt{-1}\cdot \sqrt{3}}{2} \\\\\\ x=\cfrac{-5\pm 5i\sqrt{3}}{2}\implies \boxed{x= \begin{cases} \frac{-5+ 5i\sqrt{3}}{2}\\\\ \frac{-5-5i\sqrt{3}}{2} \end{cases}}$

6 0

3 years ago

Which would you use to compare 10 / 12 and 2 / 5 a common numerator or common denominator?

BartSMP [9]

We can compare 2 fractions by means of the cross multiplication method. In our case, we have

since 50 is greater than 24 then 10/12 is greater than 2/5:

$\frac{10}{12}>\frac{2}{5}$

3 0

1 year ago

Joseph’s garden is 9 feet wide and 12 feet long. Alana’s garden is 7 feet wide and 25 feet long.

Bogdan [553]

Area = length × width

Joseph: 12 × 9 = 108 feet
Alana: 25 × 7 = 175 feet

175 feet - 108 feet = 67 feet

Answer: Alana's garden is greater by 67 feet compared to Joseph's

6 0

3 years ago

Which ratios have a unit rate of 4? Choose ALL that apply.

Keith_Richards [23]

Answer:

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Step-by-step explanation:

6 0

3 years ago

NEED HELP ASAP! WILL MARK BRAINLIEST!!!

Tpy6a [65]

Answer:

Andrew: 6.25 days

Bailey: 25 days

Step-by-step explanation:

7 0

3 years ago