4th one btw I was a prospect elite on Brainly but I got banned
1. Simplify brackets<span>-2+11+4 </span>
2. Simplify<span><span>13
(answer is 13) cymath.com is a great help
</span><span>
</span></span>
Answer:
Solution given:
A triangle PQR is right angled at R, with hypotenuse{h}PQ=80cm
and
base[b]PR=60cm.
perpendicular [P]= QR
<u>by</u><u> </u><u>using</u><u> </u><u>Pythagoras</u><u> </u><u>law</u>
<u>h²</u><u>=</u><u>p²</u><u>+</u><u>b²</u>
80²=QR²+60²
QR²=80²-60²
QR=
QR=20
=52.9=53cm
<u>QR</u><u>=</u><u>5</u><u>3</u><u>c</u><u>m</u><u>.</u>
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Answer:
martina is 22 feet below sea level
Step-by-step explanation:
Marina goes down 20 feet
then rises 7 feet which is 20 - 7 = 13
then goes down 9 more feet which is 13 + 9 = 22 feet
20 - 7 + 9 =22
Martina is 22 feet below sea level.