Answer:
x = 3√7 cm.
or 7.94 cm to the nearest hundredth.
Step-by-step explanation:
We use the Cosine Rule:
21^2 = x^2 + (2x)^2 - 2x.2x cos 120
21^2 = 5x^2 - 4x^2 * -0.5
441 = 5x^2 + 2x^2
7x^2 = 441
x^2 = 63
x = √63
x = 3√7 cm.
The employee discount is 30% off. Here's the process to find this answer:
Calculate the difference between the original price and the discounted price. We're trying to find the percentage of the discount, not the percentage 38.50 is of 55.
55 - 38.5 = 16.5
Multiply the difference by 100 as part of the percentage formula. (is over of is equal to the percentage over one hundred)
16.5 * 100 = 1,650
Divide your result by 55 as the final part of the percentage formula.
1,650 / 55 = 30
X+(x+14.9)+(x+29.4)=346.7
3x+44.3=346.7
3x=302.4
X=100.8
The Pelican Brief earned $100.8 million
Remember the Titans earned $115.7 million
American Gangster earned $130.2 million
It's not a multiple choice answer is it?
Answer:
x = 12.63 or x= -0.63
Step-by-step explanation:
<em>From my understanding the question is x² - 12x = 8</em>
<em>This will be solved through a quadratic equation formula.</em>
<em>Step 1: Form a quadratic equation</em>
x² - 12x = 8
x² - 12x - 8 = 0
<em>Step 2: Apply the quadratic formula</em>
a = 1, b = -12, c = -8
x = <u>-b±√b²-4ac</u>
2a
x = <u>-(-12)±√(-12)²-4(1)(-8)</u>
2(1)
<em>Step 3: Find the value of x</em>
x = <u>12±4√(11</u>
2
x = <u>12+4√(11)</u> or x = <u>12-4√(11)</u>
2 2
x = 12.63 or x= -0.63
!!