It is given that
a+b=20 -------------------- (1)
b+c=30 -----------------------(2)
We have to calculate
3 a + 4 b +7 c
Now multiplying equation(1 )by 3,we get
3 a+ 3 b=60 ----------------------------------(3)
and Multiplying equation( 2) by 4,we get
4 b + 4 c=120 -----------------------------------(4)
Adding expression (3) and (4),we get i.e left hand side of 3 to left hand side of 4 and right hand side of 3 to right hand side of 4.
3 a+ 3 b+ 4 b+ 4 c=60+120
Adding like terms, we get
3 a+ 7 b+ 4 c =180, Which is the required solution.
Answer 39
Step-by-step explanation:
Hello There!
All triangles total to 180°.
19 + 102 = 121
180 - 121 = 59
The missing angle is 59°
Hope This Helps You!
Good Luck :)
- Hannah ❤
Answer:
C.
Step-by-step explanation:
C. (-7, 2), (-1, 3), (4,7), (7,2)
The values of x are not repeating, so this is a function, because for every x has only one corresponding value of y.
