I need help please ????!!!!!

Mathematics

2 answers:

Stels [109]3 years ago

7 0

Answer:

d = 6

Step-by-step explanation:

multiply -3 by both things in equation

6 = 3d -12

6 + 12 = 18 ÷ 3 = 6

Ksju [112]3 years ago

7 0

Answer:

d = 6

Step-by-step explanation:

1. Distribute

2. Flip the equation

3. Add 12 to both sides

4. Divide both sides by 3

Please give me BRAINLIEST and THANKS lol <(￣︶￣)>

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Tahmar knows the formula for simple interest is I = Prt, where I represents the simple interest on an amount of money, P, for t

frez [133]

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Hope it helps!

5 0

4 years ago

write and equation for the line in point-slope form that passes through (2,-5) and is perpendicular to the line 2x-4y+8=0

Ivenika [448]

bearing in mind that perpendicular lines have negative reciprocal slopes, hmmm what's the slope of the equation above?

$\bf 2x-4y+8=0\implies -4y=-2x-8\implies y = \cfrac{-2x-8}{-4} \\\\\\ y = \cfrac{-2x}{4}-\cfrac{8}{-4}\implies y = \stackrel{\stackrel{m}{\downarrow }}{-\cfrac{1}{2}}x+2\qquad \impliedby \begin{array}{|c|ll} \cline{1-1} slope-intercept~form\\ \cline{1-1} \\ y=\underset{y-intercept}{\stackrel{slope\qquad }{\stackrel{\downarrow }{m}x+\underset{\uparrow }{b}}} \\\\ \cline{1-1} \end{array} \\\\[-0.35em] ~\dotfill$

$\bf \stackrel{\textit{perpendicular lines have \underline{negative reciprocal} slopes}} {\stackrel{slope}{-\cfrac{1}{2}}\qquad \qquad \qquad \stackrel{reciprocal}{-\cfrac{2}{1}}\qquad \stackrel{negative~reciprocal}{\cfrac{2}{1}\implies 2}}$

so we're really looking for the equation of a line whose slope is 2 and runs through (2,-5),

$\bf (\stackrel{x_1}{2}~,~\stackrel{y_1}{-5})~\hspace{10em} \stackrel{slope}{m}\implies 2 \\\\\\ \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-\stackrel{y_1}{(-5)}=\stackrel{m}{2}(x-\stackrel{x_1}{2}) \\\\\\ y+5=2x-4\implies y=2x-9$