Answer:
I got 25z^2−15z+2
Step-by-step explanation:
But if the answer shown is the correct answer, I think your computer read wrong, because those answers are the exact same :/
Answer:
B
Step-by-step explanation:
You look for zero and see what the coresponding is it is 2
Completing the square
alrighty
minus 31 both sides
x²+12x=-31
take 1/2 of the linear coefient and square it
12 is the linear coefient
12/2=6, (6)²=36
add that to both sides
x²+12x+36=36-31
factor perfect square trinomial
(x+6)²=5
square root both sides, remember to take positive and negative root
x+6=+/-√5
so what you want to write is
x+6=√5 and
x+6=-√5
the solutions
minus 6 both sides
x=-6+√5 and -6-√5
Answer:
24.
Step-by-step explanation:
Let's make the answer a variable, alright?
20 = (x - 3)/3 + 3(x + 2)
Get rid of the fractions.
120 = 2(x-3) + 3(x + 2)
120 = 2x - 6 + 3x + 6
120 = 5x
x = 24.
24 is your answer.
Answer:
29/69 (= 0.42)
Step-by-step explanation:
there are several ways to do this, one way is to use fractions:
Expressing each decimal in improper fractions:
14.5 = 14 1/2 = 29/2
34.5 = 34 1/2 = 69/2
Hence,
14.5 ÷ 34.5
= 29/2 ÷ 69/2
= 29/2 x 2/69
= 29/69 (answer)
If you need the answer in decimal, you can use long division to do 29÷69 and you will get 0.42 (nearest hundredth)
