Grace spent 15 minutes on her math homework. that was 30% of the total number of minutes she spent doing homework. how many minutes did she spend doing homework?

What are the solutions to the equation 4x2+3x=24-x

In the following diagram it is given that dec, ab || dc, ad || eb, and ad is congruent to bc. a)why isn't abc a parallelogram even though it has a pair of parallel sides and a pair of congruent sides b)explain why be must be congruent to bc. further explain what type of triangle this makes triangle abc and what it tells you about angle 1 and angle 2c) finally why must angle 3 be congruent to angle 1? further, explain why we know that angle 3 is congruent to angle 2

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.