Evaluate 12: (6-2). Need help

Mathematics

1 answer:

Likurg_2 [28]3 years ago

5 0

It’s 3 - remember pemdas. you do 6-2 first, which is 4 and divide 12 by 4 which is 3 :)

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Nicole invested her savings in two investment funds. The amount she invested in Fund A was $3000 less than the amount she invest

victus00 [196]

Let us denote the amount of investment in the Fund B with x. We know that Fund B returned 8% and that in Fund A Nicole invested $3000 less than the amount she invested in Fund B, so we can write: x-3000Fund A returned 6%.
Interest = 2060
The percent has been converted by multiplying the equation by 100
8x+6(x-3000)= 2060*100
8x+6x-18000=206000
14x=206000+18000
14x=224000
x=16000
Nicole invested in Fund B $16000 and in Fund A $16000-3000=13000.

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igomit [66]

Answer:

$\large\boxed{x=-\dfrac{7-\sqrt{97}}{4}\ \vee\ x=-\dfrac{7+\sqrt{97}}{4}}$

Step-by-step explanation:

$ax^2+bx+c=0\\\\\Delta=b^2-4ac\\\\\text{if}\ \Delta0,\ \text{then an equation has two solutions:}\ x=\dfrac{-b\pm\sqrt\Delta}{2a}\\\\\text{We have:}\\\\-2x^2-7x+10=4\qquad\text{subtract 4 from both sides}\\\\-2x^2-7x+6=0$

$a=-2,\ b=-7,\ c=6\\\\\Delta=(-7)^2-4(-2)(6)=49+48=97>0\\\\\sqrt\Delta=\sqrt{97}\\\\x=\dfrac{-(-7)\pm\sqrt{97}}{2(-2)}=\dfrac{7\pm\sqrt{97}}{-4}=-\dfrac{7\pm\sqrt{97}}{4}$