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abruzzese [7]
3 years ago
10

I don't understand 11a or b. Please help.

Mathematics
2 answers:
qaws [65]3 years ago
5 0
11a

you need to work out the  length of the 3 line segments and add them to find the perimeter
HJ = HK = 15  
and JK = 1/2 * HJ = 1/2 * 15 = 7.5

Therefore perimeter = 15 + 15 + 75.  = 37.5

11b
4x + 3x + 2x = 63
9x = 63
x = 7 

so HJ = 4x = 4*7 = 28 
ipn [44]3 years ago
4 0
11a
HJ=HK
HJ=2JK
HJ=15=HK
15=2jk
7.5=jk
15+15+7.5=37.5=HJK
11b
HJ=4x
HK=3x
JK=2x
9x=63
x=7
HJ=4x
HJ=4(7)=28
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8 0
3 years ago
87-(36.5-11.5)*(-3)+9 simplify using order of operations
OLga [1]
Remember PEMDAS 
Do parentheses, results in 25. So whats left is 87-25*(-3)+9
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The answer is 171!
5 0
4 years ago
Read 2 more answers
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