Answer:
7*5=35
Step-by-step explanation:
7(5)=35
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35
-1
Any variable without a visible coefficient means it has a coefficient of 1. Since it's negated, the coefficient is -1.
first one i believe
2.8
10× X = 7× 4
X = 7×4/10 = 2.8
value of x = 2.8
By law of cosines,
