Solve the equation by completing the square. Round to the nearest hundredth if necessary. x2 – 3x – 3 = 0
Answers
x² – 3x – 3 = 0
First, add 3 to both sides
x² – 3x – 3 (+3)= 0 (+3)
x² – 3x = 3
Solve for a. 2ax = -3x; a = -3/2
x² - 3x + (-3/2)² = 3 + (-3/2)²
Simplify
x² - 3x + (-3/2)² = 21/4
Complete the square
(3 - 3/2)² = 21/4
solve:
x - 3/2 = √(21/4); x = (√21 + 3)/2
x - 3/2 = -√(21/4); x = ((-√21) + 3)/2
Answers:
x = ((√21) + 3)/2 & x = ((-√21) + 3)/2
hope this helps
Hello!
I believe the answer is X = -0.79, 3.79.( rounded to nearest hundredth )
I hope it helps!
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The LCM of 4 and 7 is ______.
B) 3x+ 8 =1
C)1/2x+8=10
D)1/2(2x-6)=-6
Answers
2x=-1+7
2x=8
x=4
B)3x+ 8 =1
3x=1+8
3x=9
x=3
C) 1/2x+8=10
1/2x=10-8
1/2x=2
x=1
D)
Answers
Choose a variable to eliminate
Step 2; Multiply the first equation with the co efficient of variable you want to eliminate in equation;
Step 3:
Repeat the same for equation 2;
Step 4;
Add up or subtract the equations to eliminate the variable;
solve for remaining variable;
Replace the constant from above step in one of the original equations and solve appropriately.
Answers
Explanation: We know this because 45% off means it was at 55% of its value. 55% = .55, so we can divide the sale price by the percent of its value. 115.25 / .55 ~=~ (is around) 209.55. The answer is $209.55.
Final answer:
The original price of the tablet, before the 45% off was applied, was approximately $209.54.
Explanation:
To find the original price of the tablet, we have to understand that the 45% off coupon reduced the price to $115.25, which represents 55% (100% - 45%) of the original price. Hence, we can set up the maths, using the principle of the proportion as follows:
55/100 = $115.25/ORIGINAL PRICE
Cross multplying the fractions and dividing, gives us the original price:
ORIGINAL PRICE = (100 * $115.25)/ 55 = $209.54 rounded to the nearest cent.
So, the original price before the discount was applied should have been approximately $209.54
Learn more about percentage calculation here:
#SPJ3
Answers
x = 21, y = 25
Calculate the product of 8/15, 6/5, and 1/3.
Answers
Answers
Answer:
2
Step-by-step explanation:
cause 20 percent of 10 is 2 lol