180 - 130 = 50°
opposite sides add up to 180
Answer:
The cost of 7 pens is RS 70
Step-by-step explanation:
Let c=the cost of one book and p=the cost of one pen
5b+4p=115
b=15
5(15)+4p=115
75+4p=115
4p=115-75
4p=40
p=40/4
p=10
7p=7*10
7p=70
The cost of 7 pens is RS 70
Answer:
Step-by-step explanation:
3(5)-15+10(7)-2(5)
15-15+70-10
=60
The answer is 60
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