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grandymaker [24]
3 years ago
7

Find the domain of y = 2x + 1

Mathematics
1 answer:
Whitepunk [10]3 years ago
4 0

(-infinite sign, infinite sign)

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When you multiply a number by 1/4 is the product 1/4 of the original number?
ad-work [718]
YES ! ! !
Remember this: In math, "of" almost always means "times".
3 0
3 years ago
How can I find the complex roots of 125x^3+343. Please explain your steps
8_murik_8 [283]
First we assume that this is equal to zero

so what we notice is this is a sum of 2 perfect cube

recall that
a^3+b^3=(a+b)(a^2-ab+b^2)

125x^3+343=
(5x)³+(7)³=(5x+7)(25x²-35x+49)

now solve the part in second parenthasees because we can see that the first parenthasees (5x+7) is going to have a real root

remember quadratic formula

for ax^2+bx+c=0
x=\frac{-b+/- \sqrt{b^2-4ac} }{2a}
a=25
b=-35
c=49

x=\frac{-(-35)+/- \sqrt{(-35)^2-4(25)(49)} }{2(25)}
x=\frac{35+/- \sqrt{1225-4900} }{50}
x=\frac{35+/- \sqrt{-3675} }{50}
x=\frac{35+/- (\sqrt{3675})( \sqrt{-1}) }{50}
x=\frac{35+/- (\sqrt{3675})(i) }{50}
x=\frac{35+/- 35i\sqrt{3} }{50}
x=\frac{7+/- 7i\sqrt{3} }{10}

the comlex roots are

x=\frac{7+ 7i\sqrt{3} }{10} and \frac{7- 7i\sqrt{3} }{10}




3 0
3 years ago
HELP I WILL MARK YOU AS A BRAINLIEST!!
Hoochie [10]

Answer:He averaged about 3 miles per day. Hope this helped ya have a nice day

Step-by-step explanation:

4 0
3 years ago
Cost of printing is $500 plus $2.50 per calendar what is the slope-intercept form that models the total cost of printing
pashok25 [27]
The 500 serves as your y- intercept and 2.50 as your slope so the answer would be. Y=2.50x+500
3 0
3 years ago
An item is priced at $13.55. If the sales tax is 4%, what does the item cost including sales tax? A. $0.54 B. $18.97 C. $14.09 D
Natasha_Volkova [10]
How To Solve It:

$13.55 x 0.04 = 0.54

$13.55 + 0.54 = $14.09

Answer:

$14.09

I hope this helps! :)
7 0
3 years ago
Read 2 more answers
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