Answer:
![x=3-\sqrt{6},x=3+\sqrt{6}](https://tex.z-dn.net/?f=x%3D3-%5Csqrt%7B6%7D%2Cx%3D3%2B%5Csqrt%7B6%7D)
Step-by-step explanation:
we are given equation as
![2x^2-12x=-6](https://tex.z-dn.net/?f=2x%5E2-12x%3D-6)
Since, we have to solve it by using complete square
so, firstly we will complete square
and then we can solve for x
step-1:
Factor 2 from both sides
![2(x^2-6x)=-3\times 2](https://tex.z-dn.net/?f=2%28x%5E2-6x%29%3D-3%5Ctimes%202)
step-2:
Simplify it
![x^2-6x=-3](https://tex.z-dn.net/?f=x%5E2-6x%3D-3)
step-3:
Add both sides 3^2
![x^2-6x+3^2=-3+3^2](https://tex.z-dn.net/?f=x%5E2-6x%2B3%5E2%3D-3%2B3%5E2)
now, we can complete square
![(x-3)^2=6](https://tex.z-dn.net/?f=%28x-3%29%5E2%3D6)
step-4:
Take sqrt both sides
![(x-3)=-\sqrt{6},(x-3)=\sqrt{6}](https://tex.z-dn.net/?f=%28x-3%29%3D-%5Csqrt%7B6%7D%2C%28x-3%29%3D%5Csqrt%7B6%7D)
step-5:
Add both sides by 3
we get
![x=3-\sqrt{6},x=3+\sqrt{6}](https://tex.z-dn.net/?f=x%3D3-%5Csqrt%7B6%7D%2Cx%3D3%2B%5Csqrt%7B6%7D)
Step-by-step explanation:
What you need to do is convert the quarts into gallons and then you need to subtract the number by 2 and you have your answer. Sorry I cannot give you the answer! I'm kinda in a rush but I wanted to help you out.
If the legs are length a and b and hyptonuse is c then
a²+b²=c²
so
if the legs are 20 and 21 and the hypotnuse is x then
20²+21²=x²
400+441=x²
841=x²
29=x
13)
Circumference (C) = 2π·r
11π = 2π·r
11/2 = r
******************************
Area (A) = π·r²
= π·(11/2)²
= 121π/4
≈ 94.985 in²
14)
diameter = 2r
42 = 2r
21 = r
*******************
Area (A) = π·r²
= π·(21)²
= 441π
≈ 1384.74 in²
***************************
$280/1384.74 in²
x = $0.20
Answer: about 20 cents per square inch
Answer:
Option A earns higher interest($84115.58)
the difference in interest between the two option is $197.9
Step-by-step explanation:
In the problem we are going to apply both the simple interest formula and compound interest formula and compare which has the best/higher returns
Given data
Principal P= $43,000
Rate r= 6%= 0.06
time t= 3years
n= 4 (applicable for compound interest compounded quarterly)
solving for option A gives her 6% compounded quarterly
the compound interest formula is
![A= P(1+\frac{r}{n} )^n^t\\A= 43000(1+\frac{0.06}{4} )^{4} ^*^3](https://tex.z-dn.net/?f=A%3D%20P%281%2B%5Cfrac%7Br%7D%7Bn%7D%20%29%5En%5Et%5C%5CA%3D%2043000%281%2B%5Cfrac%7B0.06%7D%7B4%7D%20%29%5E%7B4%7D%20%5E%2A%5E3)
![A=43000(1+0.015)^{12} \\A=43000(1.015)^{12} \\A=43000*1.1956\\A= 51411.58](https://tex.z-dn.net/?f=A%3D43000%281%2B0.015%29%5E%7B12%7D%20%5C%5CA%3D43000%281.015%29%5E%7B12%7D%20%5C%5CA%3D43000%2A1.1956%5C%5CA%3D%2051411.58)
Interest is
=$8411.58
solving for option B which gives her 6% simple interest annually
the simple interest formula is
![A=P(1+r)^{t} \\A=43000(1+0.06)^3\\A=43000(1.06)^3\\A=43000*1.191\\A= 51213.68](https://tex.z-dn.net/?f=A%3DP%281%2Br%29%5E%7Bt%7D%20%5C%5CA%3D43000%281%2B0.06%29%5E3%5C%5CA%3D43000%281.06%29%5E3%5C%5CA%3D43000%2A1.191%5C%5CA%3D%2051213.68)
Interest is
= $8213.68
calculating the diference in interest between the two options we have
= $197.9
Option A earns higher interest