XOsam
23.01.2021 •
Mathematics
PLEASE HELP ASAP, MARKING BRAINLIEST!!
Find the value of x.
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Ответ:
5
Step-by-step explanation:
since the sides are the same size, then the equation should be combined into x+2=2x-3
then subtract an x from both sides: 2=x-3
then add 3 to both sides: 5=x
and you have your answer
hope this works
Ответ:
the law of cosines establish
b²=a²+c²-2*a*c*cos B
in this problem
a=4 units
c=5 units
B=60°
so
b²=a²+c²-2*a*c*cos B
b²=4²+5²-2*4*5*cos 60°
b²=16+25-40*(1/2)
b²=16+25-20
b=√[16+25-20]
the answer is
b=√[16+25-20]