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NeTakaya
3 years ago
6

7y=3x−7 Complete the missing value in the solution to the equation. (1, )

Mathematics
2 answers:
insens350 [35]3 years ago
8 0

\bf 7y=3x-7~\hspace{5em}(\stackrel{x}{1},\stackrel{y}{\phantom{X}})~\hspace{5em} \stackrel{x = 1}{7y=3(1)-7}
\\\\\\
7y=-4\implies y=\cfrac{-4}{7}
\\\\[-0.35em]
\rule{34em}{0.25pt}\\\\
~\hfill \left(\stackrel{x}{1},\stackrel{y}{-\frac{4}{7}}\right)~\hfill

bija089 [108]3 years ago
7 0
Plug 1 in for x to get 7y=3(1)-7

7y=-4
y=-4/7
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sleet_krkn [62]

We are asked to decide if the expression:

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2 years ago
each of equal sides of an isosceles triangle is 4cm greater than its height .If the base of triangle is 24 cm ,calculate the per
Montano1993 [528]
<h3><u>Answer</u><u>:</u><u>-</u></h3>

192 cm²

<h3><u>Step</u><u> </u><u>by</u><u> step</u><u> explanation</u><u> </u><u>:</u><u>-</u></h3>

Let us take the height be x , then its side = x + 4. Now half of base will be 12 cm .

<u>According</u><u> to Pythagoras Theorem :- </u>

=> base² + perpendicular ² = hypontenuse ²

=> 12² + x² = (x+4)²

=> 144 + x² = x² + 16 + 8x

=> 8x = 144-16

=> 8x = 128

=> x = 128/8

=> x = 16 cm .

Hence the height of ∆ is 16 cm .So the area will be half the product of base and altitude.

= 1/2 * 16 cm * 24cm .

= 192 cm²

<h3><u>★</u><u> </u><u>Hence</u><u> </u><u>the</u><u> </u><u>area</u><u> </u><u>of</u><u> </u><u>the </u><u>tria</u><u>ngle</u><u> is</u><u> </u><u>1</u><u>9</u><u>2</u><u> </u><u>cm²</u><u> </u><u>.</u></h3>
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3 years ago
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