3 years ago

JRJSOWNDNFNEOSLDNFBWKWLND

Mathematics

2 answers:

abruzzese [7]3 years ago

8 0

Answer:

Step-by-step explanation:

the 1 one is the right one

Gnesinka [82]3 years ago

5 0

Answer:

A. The afternoon temperature was 5 degrees above the night temperature

Step-by-step explanation:

have a nice day

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Andreas93 [3]

$x^2-21.75x=-15.75 \\
x^2-21.75x+15.75=0$

Use the quadratic formula:
$x^2-21.75x+15.75=0 \\ \\
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x=\frac{21.75-20.25}{2} \ \lor \ x=\frac{21.75+20.25}{2} \\
x=\frac{1.5}{2} \ \lor \ x=\frac{42}{2} \\
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\boxed{x=\frac{3}{4} \hbox{ or } x=21}$

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