2 years ago

What is the value of 8^3+5x when x=12

Mathematics

2 answers:

Nina [5.8K]2 years ago

8 0

The answer is 8^3+5*12=572

Aleksandr-060686 [28]2 years ago

7 0

8^3=512
5*12=60
512+60= 572

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What two numbers add to 9 and multiply to -70

Alborosie

X, y - the numbers

The numbers add to 9 and multiply to -70.
$x+y=9 \\
xy=-70 \\ \\
y=9-x \\
xy=-70 \\ \\
\hbox{substitute 9-x for y in the second equation:} \\
x(9-x)=-70 \\
9x-x^2=-70 \\
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-x-5=0 \ \lor \ x-14=0 \\
x=-5 \ \lor \ x=14 \\ \\
y=9-x \\
y=9-(-5) \ \lor \ y=9-14 \\
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Step-by-step explanation:

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