It is given that ️PQR & ️UVW are congruent to each other. According to CPCT, the corresponding angles in 2 triangles willl have the same measure. So, ∠R = ∠W, i.e, (10x - 18)° = 8x°
![\mathfrak{10x - 18 = 8x}](https://tex.z-dn.net/?f=%5Cmathfrak%7B10x%20-%2018%20%3D%208x%7D%20)
![\mathfrak{10x - 8x = 18}](https://tex.z-dn.net/?f=%5Cmathfrak%7B10x%20-%208x%20%3D%2018%7D%20)
![\mathfrak{2x = 18}](https://tex.z-dn.net/?f=%5Cmathfrak%7B2x%20%3D%2018%7D%20)
![\mathfrak{x = \dfrac{18}{2}}](https://tex.z-dn.net/?f=%5Cmathfrak%7Bx%20%3D%20%5Cdfrac%7B18%7D%7B2%7D%7D%20)
![\underline{\mathfrak{x = 9}}](https://tex.z-dn.net/?f=%5Cunderline%7B%5Cmathfrak%7Bx%20%3D%209%7D%7D%20)
Measure of ∠R :
![\mathfrak{8x}](https://tex.z-dn.net/?f=%5Cmathfrak%7B8x%7D%20)
![\mathfrak{8(9)}](https://tex.z-dn.net/?f=%5Cmathfrak%7B8%289%29%7D%20)
![\boxed{\mathfrak{72^{\circ}}}](https://tex.z-dn.net/?f=%5Cboxed%7B%5Cmathfrak%7B72%5E%7B%5Ccirc%7D%7D%7D%20)
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Assuming f(x) is the cost and X is the number of months.
f(x)=2x+40
So 48 • 4 would equal 192 so 4 • 2 mins equals 8 mins and then you have 8 more books to unpack so 48 divide by 8 equals 6. So the answer would bc (8 mins and 6 second)
There shouldn't be a negative in front of one of the equations.
Isolating the x^2 is the simplest way. it would only be three steps.