Sorry I don’t speak Spanish but check on google it will help you more
Answer:

or

Step-by-step explanation:
FOIL
(1/2)h*B1+ (1/2)h*B2=A
subtract the B2 term
(1/2)h*B1 = A- (1/2)h*B2
multiply by 2
h*B1 = 2A - h*B2
divide by h

or

Answer:

Step-by-step explanation:
we know that
1 kg=1,000 g
so
using proportion
Find out how many kilograms are 69 grams
Let
x -----> the weight in kg

Answer:
yes 6 (7) + 2 (3²) = 60
Step-by-step explanation:
60 = 60
Answer 1/3
Explanation:
Write all numbers above common denominator
Then subtract the numbers