Step-by-step explanation:
multiply 455 by 0.20
convert percentage to decimal
20% = 0.20 ( multiply by 10^-2)
why does this work?
convert to a fraction
20/100 ( this is also how you get decimal)
simplify 20/100 = 1/5
so multiplying 455 by 0.20 is the same as dividing by 5
Answer:
x = 2
Step-by-step explanation:
expand the brackets firstly,
so 12x-4 = 20
then add the -4 onto the other side
so 12x = 24
then divide 24 by 12 to get x
so x = 2
Answer:
Step 5 is incorrect because a previous step is incorrect
Step-by-step explanation:
Step 1 correct
Step 2 correct
Step 3 correct
Step 4 incorrect: It must be
y² - 10y + 25 = 2x + 23
Step 5 incorrect because step 4 incorrect
Step 5 must be : 1/2(y - 5)² - 23/2 = x
Answer:
Step-by-step explanation:
= (12 x 2) - (7 x 3)
= 24 - 21
= 3
