2 years ago

X^2-18x complete the square

Mathematics

1 answer:

meriva2 years ago

7 0

$x^2 -18x \\\\=x^2 - 2 \cdot 9x +9^2 -9^2\\\\=(x-9)^2-81$

You might be interested in

How do you solve the following equation: 5-(2x-3)=-8+2x

kirza4 [7]

I believe it would be done like this:
subtract 2x-8 from both sides. then use cubric formula.
answer should be x= 1.688242

4 0

3 years ago

Find the length of the arc

pickupchik [31]

Answer:

23.6 or 1 4 × π × 8 = 2 π if its not right let me know

Step-by-step explanation:

5 0

2 years ago

Nancy's garden has the dimensions shown 4 1/2 yard 3 3/4 yd . She need find the area

Marina86 [1]

Answer:

The area of Nancy's garden is $16\frac{7}{8}\ yd^{2}$

Step-by-step explanation:

I assume that the Nancy's garden is a rectangle shape

To find the area first convert mixed number to an improper fraction

$4\frac{1}{2}\ yd=\frac{4*2+1}{2}=\frac{9}{2}\ yd$

$3\frac{3}{4}\ yd=\frac{3*4+3}{4}=\frac{15}{4}\ yd$

Therefore

The area is equal to

$A=\frac{9}{2}*\frac{15}{4}=\frac{135}{8}\ yd^{2}$

convert to mixed number

$\frac{135}{8}\ yd^{2=\frac{128}{8}+\frac{7}{8}=16\frac{7}{8}\ yd^{2}$

4 0

3 years ago

A girl takes 6 hours to ride 38.4 kilometers what is her speed

miss Akunina [59]

I'm not sure but i think its 6.4km per hour

8 0

3 years ago

Read 2 more answers

HELP ASAP Find the Difference. SHOW YOUR WORK 3x + 5 - (2x + 2)

REY [17]

Answer:

3x + 5 - (2x + 2)

3x + 5 -2x-2

x+3

Step-by-step explanation:

3 0

3 years ago