Answer:
2 x 20 + 2 x 15 = 40 + 30 = 70
Step-by-step explanation:
2x20=40
2x15=30
40+30=7
Multiply the bracket by 4
4(x)+6+3+7= 17
4x+6+10=17
4x+16= 17
4x+16-16= 17-16
4x= 1
divide by 4 for 4x and 1
4x/4= 1/4
x= 1/4 or in decimal form , x= 0.25
Check answers by using substitution method:
4(1/4)+6+3+7= 17
1+9+7= 17
17= 17
Answers can be x= 1/4 or x= 0.25
Answer:
If I had to guess, I'd say its A.
Since both terms are perfect squares, factor using the difference of squares formula,
a² − b² = (a + b) (a − b) where a = 5(x + 5/4) and b = 4 (x (7/4) ).
− (12x + 25/4) (2x + −25/4)
