Answer:
10·b = 60
Step-by-step explanation:
The given system of equation is presented as follows;
5·a + 5·b = 25...(1)
-5·a + 5·b = 35...(2)
Given that the coefficient of a in equation (1) is equal in magnitude but opposite in sign to the coefficient of 'a' in equation (2), to eliminate the variable 'a' when using the elimination method, we add both equations as follows;
5·a + 5·b + (-5·a + 5·b) = 25 + 35 = 60
5·a - 5·a + 5·b + 5·b = 60
5·a - 5·a = 0
5·b + 5·b = 10·b
∴ 5·a - 5·a + 5·b + 5·b = 60 = 0 + 10·b = 10·b
∴ 10·b = 60
Answer:
2
Step-by-step explanation:
2 x 4 = 8
2 x 3 = 6
Answer:
A, B, C are correct
Step-by-step explanation:
m∠T is the complement of ∠C, so is 90° -16.7° = 73.3° . . . matches C
The lengths of the sides are ...
t = a·cos(16.7°) = 49·0.957822 ≈ 46.93 . . . matches B (not D)
c = a·sin(16.7°) = 49·0.287361 ≈ 14.08 . . . matches A
Add 4 to both sides to cancel out the -4 on the left.
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