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3 years ago

Please answer!!!! Will mark Brainlyest

Mathematics

1 answer:

Brilliant_brown [7]3 years ago

7 0

Answer:

The coefficient is 3.

Step-by-step explanation:

Perimeter of a triangle= a+b+c

x + 10 + x + 15 + x + 12

<u>3</u>x + 37

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Hola pueden ayudar a=6cm b=8cm c?

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2 years ago

B. What integer(s) when added to -7 give a sum less than 0?

Dmitry_Shevchenko [17]

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the answer is 6 and below

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3 years ago

<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B10%28x%20-%20y%29%20-%204%281%20-%20x%29%7D%7B3%7D%20%20%3D%20y" id="TexFormula1"

ikadub [295]

so first off, let's simplify both equations, starting off by multiplying both sides by the LCD of all fractions, to do away with the denominators.

$\bf \cfrac{10(x-y)-4(1-x)}{3}=y\implies \stackrel{\textit{multiplying both sides by }\stackrel{LCD}{3}}{10(x-y)-4(1-x)=3y} \\\\\\ 10x-10y-4+4x=3y\implies \boxed{14x-13y=4} \\\\[-0.35em] ~\dotfill\\\\ 7+x-\cfrac{x-3y}{4}=2x-\cfrac{y+5}{3}\implies \stackrel{\textit{multiplying both sides by }\stackrel{LCD}{12}}{12\left( 7+x-\cfrac{x-3y}{4} \right)=12\left( 2x-\cfrac{y+5}{3} \right)} \\\\\\ 84+12x-3(x-3y)=24x-4(y+5) \\\\\\ 84+12x-3x+9y=24x-4y-20\implies \boxed{-15x+13y=-124}$

now, let's do some elimination on those two simplified equations.

$\bf \begin{array}{cllcl} 14x&-13y&=&4\\ -15x&+13y&=&-124\\\cline{1-4} -x&&=&-120 \end{array}~\hfill x=\cfrac{-120}{-1}\implies \blacktriangleright x=120 \blacktriangleleft \\\\\\ \stackrel{\textit{substituting on the 1st equation}}{14(120)-13y=4}\implies 1680-13y=4\implies 1680-4=13y \\\\\\ 1676=13y\implies \blacktriangleright \cfrac{1676}{13}=y \blacktriangleleft \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ ~\hfill \left( 120~,~\frac{1676}{13} \right)~\hfill$

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3 years ago

PilotLPTM [1.2K]

-75x - 36 = -21x²

-75x Seventy-five times a negative integer
-36 Minus 36
= Equals
-21x² The square of the negative integer

Hope this helps!

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