Help. What is 90% decreased by 10% :/

Is it 81?

3-12. write each answer with a reasonable number of figures. find the absolute uncertainty and percent relative uncertainty for each answer. (a) [12.41 (±0.09) + 4.16 (±0.01)] x 7.068 2 (±0.000 4) =? (b) [3.26 (±0.10) x 8.47 (±0.05)] - 0.18 (±0.06) =? (c) 6.843 (±0.008) x 104 + [2.09 (±0.04)- 1.63 (±0.01)] =?

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x

Plot a point at the y-intercept of the following function on the provided graph. 3y=-5x+7 20 points