Answer: The answer should be C if you were to add each point.
Answer:
Todd's
Step-by-step explanation:
Given the expression x^2+6x+5=8, we are to determine which whether Imani or Todd method will work
Imani method might not work because he hasn't written the equation in standard form before factorizing. He should have equated the expression to zero first before factorizing and finding the zeros of the expression. The equation should have been written in the form ax²+bx+c = 0 first.
For Todd, his method will work because he used the completing the square method. The value at the right hand may not necessarily be zero before applying the rule. The idea is to make the quadratic equation complete and a perfect square.
This is achieved by adding the half of coefficient of x to both sides of the expression before simplifying.
From the expression x²+6x+5 = 8 we can see that adding 4 to both sides will make the quadratic equation on the left a perfect square.
x²+6x+5= 8
x²+6x+5+4= 8 +4
x²+6x+9 = 12
x²+3x+3x+9 = 12
x(x+3)+3(x+3) = 12
(x+3)(x+3) = 12
(x+3)² = 12
We can see that the expression at the left hand is now a perfect square. Hence Todd solution strategy will work
Because you have not provided an image its hard for me to give you an answer.
Answer: 2.1×10^4
Step-by-step explanation:
7×3×10^3
First you multiply 7×3 = 21
Then add the rest 21×10^3
Then simplify 2.1×10^4
You can check this since:
7×3000 = 21000
When simplified
2.1×10^4
Answer:
Step-by-step explanation:
y varies with the square of x:
y = kx²
y equals 24 when x equals 10
24 = k·10²
constant of proportionality k = 0.24
when x = 20, y = 0.24·20² = 96
"select two answers" —where are the choices?