Answer:
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What is - 4/5 times -5/7?
20/35 or in simplified form 4/7
Answer:
See below for answers and explanations
Step-by-step explanation:
<u>Part A</u>
<u>Part B</u>
<u>Part C</u>
Answer: he invested $46062.5 at 6% and $23031.25 at 10%
Step-by-step explanation:
Let x represent the amount which he invested in the account paying 6% interest.
Let y represent the amount which he invested in the account paying 10% interest.
He puts twice as much in the lower-yielding account because it is less risky.. This means that
x = 2y
The formula for determining simple interest is expressed as
I = PRT/100
Considering the account paying 6% interest,
P = $x
T = 1 year
R = 6℅
I = (x × 6 × 1)/100 = 0.06x
Considering the account paying 10% interest,
P = $y
T = 1 year
R = 10℅
I = (y × 10 × 1)/100 = 0.1y
His annual interest is $7370dollars. it means that
0.06x + 0.2y = 7370 - - - - - - - - - -1
Substituting x = 2y into equation 1, it becomes
0.06 × 2y + 0.2y = 7370
0.12y + 0.2y = 7370
0.32y = 7370
y = 7370/0.32
y = $23031.25
x = 2 × 23031.25
x = 46062.5
Answer:
![\large\boxed{\sqrt{xy^3}\cdot\sqrt[3]{x^2y}=\sqrt[6]{x^7y^{11}}}](https://tex.z-dn.net/?f=%5Clarge%5Cboxed%7B%5Csqrt%7Bxy%5E3%7D%5Ccdot%5Csqrt%5B3%5D%7Bx%5E2y%7D%3D%5Csqrt%5B6%5D%7Bx%5E7y%5E%7B11%7D%7D%7D)
Step-by-step explanation:
![\text{Use}\ a^\frac{1}{n}=\sqrt[n]{a}\\\\\sqrt{xy^3}\cdot\sqrt[3]{x^2y}=(xy^3)^\frac{1}{2}(x^2y)^\frac{1}{3}\\\\\text{use}\ (ab)^n=a^nb^n\ \text{and}\ (a^n)^m=a^{nm}\\\\=x^\frac{1}{2}y^{(3)\left(\frac{1}{2}\right)}x^{(2)\left(\frac{1}{3}\right)}y^\frac{1}{3}\\\\\text{use}\ a^na^m=a^{n+m}\\\\=x^{\frac{1}{2}+\frac{2}{3}}y^{\frac{3}{2}+\frac{1}{3}}\\\\\text{the common denominator is 6}](https://tex.z-dn.net/?f=%5Ctext%7BUse%7D%5C%20a%5E%5Cfrac%7B1%7D%7Bn%7D%3D%5Csqrt%5Bn%5D%7Ba%7D%5C%5C%5C%5C%5Csqrt%7Bxy%5E3%7D%5Ccdot%5Csqrt%5B3%5D%7Bx%5E2y%7D%3D%28xy%5E3%29%5E%5Cfrac%7B1%7D%7B2%7D%28x%5E2y%29%5E%5Cfrac%7B1%7D%7B3%7D%5C%5C%5C%5C%5Ctext%7Buse%7D%5C%20%28ab%29%5En%3Da%5Enb%5En%5C%20%5Ctext%7Band%7D%5C%20%28a%5En%29%5Em%3Da%5E%7Bnm%7D%5C%5C%5C%5C%3Dx%5E%5Cfrac%7B1%7D%7B2%7Dy%5E%7B%283%29%5Cleft%28%5Cfrac%7B1%7D%7B2%7D%5Cright%29%7Dx%5E%7B%282%29%5Cleft%28%5Cfrac%7B1%7D%7B3%7D%5Cright%29%7Dy%5E%5Cfrac%7B1%7D%7B3%7D%5C%5C%5C%5C%5Ctext%7Buse%7D%5C%20a%5Ena%5Em%3Da%5E%7Bn%2Bm%7D%5C%5C%5C%5C%3Dx%5E%7B%5Cfrac%7B1%7D%7B2%7D%2B%5Cfrac%7B2%7D%7B3%7D%7Dy%5E%7B%5Cfrac%7B3%7D%7B2%7D%2B%5Cfrac%7B1%7D%7B3%7D%7D%5C%5C%5C%5C%5Ctext%7Bthe%20common%20denominator%20is%206%7D)
![\dfrac{1}{2}=\dfrac{1\cdot3}{2\cdot3}=\dfrac{3}{6}\\\\\dfrac{2}{3}=\dfrac{2\cdot2}{3\cdot2}=\dfrac{4}{6}\\\\\dfrac{3}{2}=\dfrac{3\cdot3}{2\cdot3}=\dfrac{9}{6}\\\\\dfrac{1}{3}=\dfrac{1\cdot2}{3\cdot2}=\dfrac{2}{6}\\\\x^{\frac{1}{2}+\frac{2}{3}}y^{\frac{3}{2}+\frac{1}{2}}=x^{\frac{3}{6}+\frac{4}{6}}y^{\frac{9}{6}+\frac{2}{6}}=x^{\frac{7}{6}}y^{\frac{11}{6}}=\sqrt[6]{x^7y^{11}}](https://tex.z-dn.net/?f=%5Cdfrac%7B1%7D%7B2%7D%3D%5Cdfrac%7B1%5Ccdot3%7D%7B2%5Ccdot3%7D%3D%5Cdfrac%7B3%7D%7B6%7D%5C%5C%5C%5C%5Cdfrac%7B2%7D%7B3%7D%3D%5Cdfrac%7B2%5Ccdot2%7D%7B3%5Ccdot2%7D%3D%5Cdfrac%7B4%7D%7B6%7D%5C%5C%5C%5C%5Cdfrac%7B3%7D%7B2%7D%3D%5Cdfrac%7B3%5Ccdot3%7D%7B2%5Ccdot3%7D%3D%5Cdfrac%7B9%7D%7B6%7D%5C%5C%5C%5C%5Cdfrac%7B1%7D%7B3%7D%3D%5Cdfrac%7B1%5Ccdot2%7D%7B3%5Ccdot2%7D%3D%5Cdfrac%7B2%7D%7B6%7D%5C%5C%5C%5Cx%5E%7B%5Cfrac%7B1%7D%7B2%7D%2B%5Cfrac%7B2%7D%7B3%7D%7Dy%5E%7B%5Cfrac%7B3%7D%7B2%7D%2B%5Cfrac%7B1%7D%7B2%7D%7D%3Dx%5E%7B%5Cfrac%7B3%7D%7B6%7D%2B%5Cfrac%7B4%7D%7B6%7D%7Dy%5E%7B%5Cfrac%7B9%7D%7B6%7D%2B%5Cfrac%7B2%7D%7B6%7D%7D%3Dx%5E%7B%5Cfrac%7B7%7D%7B6%7D%7Dy%5E%7B%5Cfrac%7B11%7D%7B6%7D%7D%3D%5Csqrt%5B6%5D%7Bx%5E7y%5E%7B11%7D%7D)
