Answer:
43
Step-by-step explanation:
to find mean we add all the terms together and them divide by the amount of terms so lets add what we know first
2+3+4+5+6+7
27
there are 7 terms including the y so for there to be a mean of 10 the terms will have to equal 70 when added so we just subtract
70-27
43
hopes this helps please mark brainliest
NEED HELP FAST
question is in the picture attached
Answer:
x=12.99
h=7.5
Step-by-step explanation:
we us cosine rule first to look for OBthe triangle OCB is an isosceles triangle whereby angleOCB=120,angleCOB=angleCBO=30
thus length of BC is 15
[tex]cosine \: rule \\ a {}^{2} = b {}^{2} + c {}^{2} - 2bc \cos(a) [/tex]
=(15^2+15^2)-(2×15×15×cos 120)
=450-(-225)
a^2 =675
a=25.98=OB
finding xx=15sin 60
=12.99
finding hh=15sin 30
=7.5