Answer:
Im in 7th grade and I need some help on a math problem. can I post it?
Answer:
7) a = 60; b = 100
8) c = 20
9) d = 45
Step-by-step explanation:
7)
a + 120 = 180
a = 60
b + 80 = 180
b = 100
8)
5c + 4c = 180
9c = 180
c = 20
9)
3d + d = 180
4d = 180
d = 45
34 tens + 20 tens = ?
1 ten = 10 ones or 10.
34 + 20 = 54
54 tens
34 tens + 20 tens = 54 tens
54 × 10 = 540
34 tens + 20 tens = ?
34 tens + 20 tens = 54 tens
34 tens + 20 tens = 540
Answer:
first is -3, second number is 0
Step-by-step explanation:
you have two equations x+3=y and 4*x+12=5*y
Use the first one and write y in terms of x in the second equation:
4*x+12=5*(x+3)
4*x+12=5*x+15
12=5*x-4*x+15
12=x+15
x=-3
