<h3> Answer:</h3><h2>a.215</h2>
I don't know in letter b.
#CaRRyOnLeArniNG
Answer:
D. is correct!
Step-by-step explanation:
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^ just an example
brainliest?
Answer:
77.
Proved
78.
Proved
79.
Proved.
80.
Proved.
Step-by-step explanation:
77. Left hand side
=
=
=
{Since we know,
}
=
= Right hand side (Proved)
78. Left hand side
=
=
{Since
}
=
= Right hand side (Proved)
79. Left hand side
=
=
{Since
}
=
= Right hand side
80. Left hand side
=
=
{Since
}
=
=
= Right hand side. (Proved)
QR IS 23.8! Just subtract 68.4-44.6. The answer is right because 44.6+23.8=68.4