3 years ago

PLEASE HELP DUE TONIGHT

Mathematics

2 answers:

kenny6666 [7]3 years ago

8 0

Answer:

please give me BRAINLIEST answer

Step-by-step explanation:

1. x3 =729

=x = 729/3

x=243

2. x3 =343

x= 343/3

x= 114.33

3. x2= 121

x = 121/2

x = 60.5

Strike441 [17]3 years ago

6 0

Answer:

x=243

$x = \frac{343}{3}$

$x = \frac{121}{2}$

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What are the solutions to the following system?

RoseWind [281]

$\bf \begin{cases}
-2x^2+y=-5\\
\boxed{y}=-3x^2+5\\
----------\\
-2x^2+\left( \boxed{-3x^2+5} \right)=-5
\end{cases}
\\\\\\
-5x^2+5=-5\implies -5(x^2-1)=-5\implies x^2-1=\cfrac{-5}{-5}
\\\\\\
x^2-1=1\implies x^2=2\implies x=\pm\sqrt{2}$

and since we know what "x" is, then let's substitute it on say the 1st equation

$\bf -2x^2+y=-5\implies -2\left( \pm \sqrt{2} \right)^2+y=-5\implies -4+y=-5
\\\\\\
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\left( \sqrt{2}~,~-1 \right)\qquad \left( -\sqrt{2}~,~-1 \right)$

7 0

3 years ago

Read 2 more answers

Can someone please explain how to figure this out?!!

Keith_Richards [23]

It’s basically the opposite just switch it and put the 5/t now

4 0

3 years ago

3) gentry is training for a marathon. she increases the amount of time she runs by 5 mins. each day to build up her endurance. o

nika2105 [10]

Y=5x+30

X is the days

And so by plugging in x you get

y=5(5)+30
y=25+30
y=55

And so by day 5 she's running 55 minutes

But that's what I think

3 0