50% of all the cakes jenny baked that week were party cakes, 1 fifth were fruit cakes, and the remainder were sponge cakes. what percentage of cakes were sponge cakes?

5units=50%
1 unit=50/5
         =10%
4/5 are the sponge cakes.. Which makes it 4units for the sponge cakes.
4 units= 4x10
           =40%

I’m going to infer you said parallel.solve for yy= -1/2x+7/4lines that are parallel have the same slope, different y intercept.so we know m is -1/2then from there solve for y intercept.