3 years ago

59.9338a+58.9332(0.031720577-a)=1.8712 solve for a

Mathematics

1 answer:

dimaraw [331]3 years ago

8 0

Answer:

what is this asking???

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Words to match the expression. 3+(4×12)

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Three more than the product of 4 and 12

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Step-by-step explanation:

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Select the quadratic that has roots x = 8 and x = -5.<br> What is the answer

olga2289 [7]

Answer:

x^2 - 3x - 40

Step-by-step explanation:

x = 8 and x = -5

x - 8 = 0 and x + 5 = 0

(x - 8)(x + 5)

x^2 + 5x - 8x - 40

x^2 - 3x - 40

Answer: x^2 - 3x - 40

7 0

3 years ago

<img src="https://tex.z-dn.net/?f=%5Cfrac%7Ba%5E%7B2%7D-1%7D%7B2-5a%7D%20times%20%5Cfrac%7B15a-6%7D%7Ba%5E%7B2%7D%2B5a-6%7D" id=

stepan [7]

$\bf \cfrac{a^2-1}{2-5a}\times \cfrac{15-6}{a^2+5a-6}\\\\
-----------------------------\\\\
recall\quad \textit{difference of squares}
\\ \quad \\
(a-b)(a+b) = a^2-b^2\qquad \qquad 
a^2-b^2 = (a-b)(a+b)\\\\
thus\quad a^2-1\iff a^2-1^2\implies (a-1)(a+1)
\\\\\\
now\quad a^2+5a-6\implies (a+6)(a-1)\\\\
-----------------------------\\\\
thus
\\\\\\
\cfrac{a^2-1}{2-5a}\times \cfrac{15-6}{a^2+5a-6}\implies \cfrac{(a-1)(a+1)}{2-5a}\times \cfrac{3(5a-2)}{(a+6)(a-1)}\\\\
-----------------------------\\\\
$

$\bf now\quad 3(5a-2) \iff -3(2-5a)\\\\
-----------------------------\\\\
thus
\\\\\\
\cfrac{\underline{(a-1)}(a+1)}{\underline{2-5a}}\times \cfrac{-3\underline{(2-5a)}}{(a+6)\underline{(a-1)}}\implies \cfrac{-3(a+1)}{a+6}$

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3 years ago

Y = 5.7x + 14.34<br> y= - 2x - 2.6

ladessa [460]

Step-by-step explanation:

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3 years ago