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Bumek [7]
3 years ago
5

Easiest way to remember complete the square for the right side?

Mathematics
1 answer:
blagie [28]3 years ago
7 0
Let's look at an example

x^2 + 6x + 3 = 8

Take the "b" coefficient of the quadratic equation, which is 6 and divide in half and square it.
6/2 = 3
3^2 = 9

9 is what we need to be the constant on the left side not 3. We can add 6 to the 3 to make 9 ... but what ever you do to the left side must also be done to the right side to keep the equation the same. .

think of it in simple terms: 5 = 5
if you add 3 to the left but not the right it is not valid 5+3 does not equal 5 anymore

x^2 + 6x + 3 + 6 = 8 + 6
x^2 + 6x + 9 = 14
( x + 3)^2 = 14
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15 of 20 answer
expeople1 [14]

Answer:

8 bags

Step-by-step explanation:

You divided them by 20 which gives you 4. So you take the 3 and multiply by 4 which is 12 bags. And then you do the same for your bags which makes you do 2 times 4 which gives you 8. You take 20 - 12 and that leaves you with 8.

3 0
3 years ago
5(x – 4) + 3x – 9x = 6 - (2x + 5) + 8x
AURORKA [14]
This is what i got:
-x-20=6x+1
6 0
3 years ago
Help!
Galina-37 [17]

Answer:

B

Step-by-step explanation:

Note:

1 gal = 4 quarts

1 pint = 0.5 quart

Re-writing all the choices in dollars and quarts and calculating how much each quart costs

A)  $1 per 1 quart

B)  $2 per gallon = $2 per 4 quarts = $2 ÷ 4 quarts = $0.50 per quart

C)  $1.50 per 2 quarts = $1.50 ÷ 2 quarts = $0.75 per quart

D)  $0.50 per 1 pint = $0.50 per 0.5 quart = $0.50 ÷ 0.5 quart = $1 per quart

If you compare all of the above, it is clear that answer B ($0.50 per quart) is the cheapest rate and hence the best deal.

6 0
3 years ago
Find the l.c.m of x²+x, x²-1, x²-x​
olga2289 [7]

Answer:

X³-x

Step-by-step explanation:

Lcm

x(x-1)(x+1)

x(x²-1)

x³-x

6 0
2 years ago
Find the exact value of T Image below
Elanso [62]

Answer:

a) 1/800 or 0.00125

b) i) 0.0013

ii) 0.001

c) 60%

Step-by-step explanation:

T = [tan(2×30)+1][2cos(30)-1] ÷ (y²-x²)

T = (tan60 + 1)(2cos30 - 1) ÷ (41² - 9²)

T = (sqrt(3) + 1)(sqrt(3) - 1) ÷ 1600

T = (3-1)/1600

T = 2/1600

T = 1/800

T = 0.00125

Error: 0.002 - 0.00125

0.00075

%error

0.00075/0.00125 × 100

60%

4 0
3 years ago
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