<span>2680 * 6.2% = $166
Make sure you add the amount that is supposed to be deducted when you attempt to solve your problems, I'm a visual learner and I usually find it best to write everything out to see where to go next. <3 do well my dear</span>

3 0

3 years ago

The line with equation ax+by=20 passes through the points(-2,10) and (1,5)<br>find a and b

Doss [256]

$ax+by=20 \\ \\(-2,10) \\ \\ a*(-2)+b*10 = 20 \\ \\-2a +10b = 20 \\ \\ (1,5)\\ \\ a*1+b*5 = 20 \\ \\ a +5b = 20$

$\begin{cases} -2a+10b =20\\ a+5b =20 \ /*2\end{cases} \\ \\\begin{cases} -2a+10b =20\\ 2a+10b =40 \end{cases}\\--------\\ 20b=60 \ / :20 \\ \\b=\frac{60}{20} =3$

$-2a+10b=20 \\ \\-2a +10*3=20 \\ \\-2a +30=20\\ \\-2a=20-30\\ \\-2a=-10 \ /: (-2)$

$a=\frac{10}{2}=5\\ \\\begin{cases} a= 5 \\b=3\end{cases}$

6 0

4 years ago

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Is -4.08 greater than or less than -4.7

DerKrebs [107]

-4.08 is greater than -4.7 since its negative
ex: -1 is greater than -2 since -1 is closer to zero than -2

5 0

4 years ago

Read 2 more answers