Answer:
A.
1. 21
2. 13.5
3. 90°
4. 60°
5. 130°
B.
1. x = 4
2. AB = 25
3. BC = 25
4. 100 units
Step-by-step explanation:
1. 7x-3 = 4x+9
3x = 12 ; x = 4
2. 7x-3 = 7(4)-3 = 28-3 = 25
3. 4x+9 = 4(4)+9 = 16+9 = 25
4. 25 × 4 = 100
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Answers & Comments
Answer:
A.
1. 21
2. 13.5
3. 90°
4. 60°
5. 130°
B.
1. x = 4
2. AB = 25
3. BC = 25
4. 100 units
Step-by-step explanation:
B.
1. 7x-3 = 4x+9
3x = 12 ; x = 4
2. 7x-3 = 7(4)-3 = 28-3 = 25
3. 4x+9 = 4(4)+9 = 16+9 = 25
4. 25 × 4 = 100