All categories

2 years ago

How do you complete a square

1 answer:

7 0

Step 1 Divide all terms by a (the coefficient of x2).
Step 2 Move the number term (c/a) to the right side of the equation.
Step 3 Complete the square on the left side of the equation and balance this by adding the same value to the right side of the equation.

You might be interested in

A study is done to find the 95% confidence interval for the difference in means between the ACT scores between two schools in a

Kitty [74]

Solution :

95% confidence interval for the difference between the means of ACT scores between two schools, is given by :

$[(\overline X_1 - \overline X_2)-ME, (\overline X_1 - \overline X_2)+ME]$

$\overline X_1 = 25.90 , \ \ \ \overline X_2 = 27.70$

$S_1=3.49, \ \ \ S_2 = 2.47$

$n_1=39, \ \ n_2=37$

M.E. , Margin of error,

$=t_{n_1+n_2-2,0.025} \times \left( s \sqrt{\frac{1}{n_1}+\frac{1}{n_2}}$

$s^2 = \frac{(n_1-1)S_1^2+(n_2-1)S^2_2}{n_1+n_2-2}$

$=\frac{38(3.49)^2+36(2.47)^2}{39+37-2}$

= 9.222

s = 3.03

$t_{74,0.05} = 1.99$

$M.E. = 1.99 \times 3.03 \times \sqrt{\frac{1}{39}+\frac{1}{37}}$

= 1.4

Therefore, 95% CI = [(25.90-27.70) - 1.4 , (25.90-27.70) + 1.4]

= [-3.2, -0.4]

Therefore, the lower bound is -3.2

7 0

2 years ago

90% of 60,000,000 <br><br> Please help soon

alexgriva [62]

Answer:

54000000

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

7/10 of a farmers crop is corn. 2/3 is sold for biofuel. What percent of total crop was used for fuel?

babymother [125]

Answer: COAL MINERS

Step-by-step explanation:

YOU SEE, GLOBAL WARMING IS FAKE SO THE ANSWER HAS TO BE 69

7 0

3 years ago

0.2y + 7 = 24 please help

zzz [600]

First multiply the equation by 5 to get y by itself.
$y+35=120$
Then subtract 35 from each side to get the integer by itself.
So, final answer:
$y=85$

8 0

2 years ago

A cube has a volume of 64 cm3. What is the length of a side of a cube

Reil [10]

Answer:

V=8cm

Step-by-step explanation:

V=a³

a=∛64

7 0

3 years ago