The answer is A I believe
Answer:
Step-by-step explanation:
a) 5 cm(25000)(1 m/100 cm)(1 km/1000 m) = 1.25 km
b) 2.2 km (1000 m/km)(100 cm/m) / 25000 = 8.8 cm
Step 1:
3(4w-1)= 12w-3
step 2:
7w+12w-3
=19w-3
step 3:
-79=19w-3 (so add 3 to -79)
step 4:
-76=19w (just divide by 19 to get w)
step 5:
-4=w
The answer is y= 1/2x + 2
Factorising an equation is putting it into bracket form.
This has square numbers and so needs double brackets
(5x - y) (5x+y)
If you then check this by multiplying the brackets out again you will get:
5x^2 - 5xy + 5xy - y^2
The positive and negative 5xy's cancel each other out and you are left with its original form. Your answer is
(<span>5x - y) (5x+y)</span>