3. A and 4. C .....I think
8 and 10 because 8 x 5 equals 40 and 10 x 4 equals 40. and 10 minus 8 is two
Assuming cos means cos(x);
Combine all like terms: cos(x)(√2 - 12)= -1
Isolate x: cos(x)= -1/(√2 - 12)
cos(x)=0.0944
x=cos⁻¹(0.0944)
x= 84.57 degrees or (360-x=275.42 degrees)
Hope I helped :)
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</span>The square-shaped slice can be made from a slice parallel to the base of a right
rectangular prism, cube, and right rectangular pyramid with a square base. The triangle-shaped slice and isosceles
trapezoid-shaped slice can be made with a slice made perpendicular to the base
of a right rectangular pyramid. A
pentagon-shaped slice cannot be made from a slice made parallel or
perpendicular to the base of either a right rectangular prism, right
rectangular pyramid, or cube.
