Step-by-step explanation adults=50x10=500 children 300x5=1500 1500 +500=2000
Answer:
a = 1, b = 7
Step-by-step explanation:
Given the 2 equations
3a + 6b = 45 → (1)
2a - 2b = - 12 → (2)
Multiply (2) by 3 and add to (1) to eliminate the term in b
6a - 6b = - 36 → (3)
Add (1) and (3) term by term
(3a + 6a) + (6b - 6b) = (45 - 36)
9a = 9 ( divide both sides by 9 )
a = 1
Substitute a = 1 in either (1) or (2) and solve for b
(1) → 3 + 6b = 45 ( subtract 3 from both sides )
6b = 42 ( divide both sides by 6 )
b = 7
Answer:
The length of the missing side b would be 16m
Step-by-step explanation:
first you would use the formula a2+b2=c2
12^2+b2=20^2
-take 12*12 and 20*20
144+b2=400
-subtract 144 from 400 in order to get b2 alone
b2=256
-take the square root of b and 256
b=16
answer 22
beqause parallelograms are 180 ° = A + B = 90 ° AND AND C + D = 90° AND B = C , A= D then
A + B = 90° A= 68 THEN 68 + B = 90° = B = 90 ° - 68 ° = 22°
