Step-by-step explanation:
x^2 + 8x + 0 = 0
Completing the square just means getting yourself a perfect square trinomial on the left side of your equation. It makes factoring easier for you. The steps are like this:
x² + 8x + 0 = 0 ... take the middle coefficient, 8, divide it by 2, and square it. Same process every time. Divide middle by two, square it. This gives you the "perfect square" of your equation. In this case, 8/2 = 4, and 4² = 16. So what you do is add 16 to BOTH sides of the equation.
x² + 8x + 16 = 16 ... factor the left side
(x + 4)(x + 4) = 16 ... notice that your two factors on the left are identical
(x + 4)² = 16 ... now we want to solve for x. Start by taking the square root of both sides
x + 4 = √16 ... √16 can give us two results: -4 and 4. So solve for both.
x + 4 = 4 x + 4 = -4 ... solve for x
x = 0, x = -8
Answer:
The equation can be expressed as;
x+y=71 where,
Lengths of two equal sides=x=22 m
Lengths of longer side=y=27 m
Step-by-step explanation:
The total perimeter can be expressed as;
Total perimeter=Total length of the equal sides+total length of the longer side
where;
Total perimeter=71 m
Total length of each of the equal sides=x m
Total length of longer side=y=(x+5) m
replacing;
x+y=71...equation 1
71=(2×x)+(x+5)
2 x+x=71-5
3 x=66
x=66/3
x=22 m
y=x+5=22+5=27 m
Lengths of two equal sides=22 m
Lengths of longer side=27 m
Equation;
x+y=71
Your current balance if you started the day with $100 in your account is $73
First step is to calculate the total cash at bank
Using this formula
Total Cash at bank= Cash at bank + Deposit
Let plug in the formula
Total Cash at bank=$100+90
Total Cash at bank=$190
Second step is to calculate the amount debited
Debit amount=($60+$3)+($34+$20)
Debit amount=$63+$54
Debit amount=$117
Now let determine your current balance
Current balance=Total cash at bank-Amount debited
Let plug in the formula
Current balance=$190-117
Current balance=$73
Your current balance if you started the day with $100 in your account is $73
Learn more here:
brainly.com/question/22165984
I think u will need to add 5ml acid into the solution to get 25% acid
Answer:
same question bro
Step-by-step explanation:
