1) b=1
-3+1=3b-5
Add 3b to both sides.
1=6b-5
Add 5 to both sides
6=6b
Divide both sides by 6
b=1
2) t=11
(1/2)t+7=(3/2)t-4
Subtract 1/2t from both sides.
7=t-4
Add 4 to both sides.
t=11
3) x=-0.878
-2.3 +1.2x=5.9-2.9x
Subtract 1.2x from both sides
-2.3=5.9-4.1x
Add 5.9 to both sides.
3.6=-4.1x
Divide by -4.1
x=-0.878
4)No solution
-7y-21=-3y-21
Add 3y to both sides.
-4y-21=-21
Add 21 to both sides
-4y=0
Two angles are vertical
Hypothesis is after “if” but before “then”
Answer: 72°, 108°, 108°
<u>Step-by-step explanation:</u>
Vertical angles are congruent (equal) so if one angle is 72° then its vertical angle is also 72°.
A vertical angle and its adjacent angle form a 180° angle, so the other two angles are each 180° - 72° = 108°
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<em>see image below</em>
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Answer:
an open circle means it contains no equal signs.....everything to the left is shaded....means it is less then
x < 1 (thats a less then sign only) ....no equal sign in there
