Use front-end estimation to add 495 + 650 + 875. indicate the three digits that you will add first?

Find all the values of x that make 0.1x + 0.25(102 - x) < 17.10 true.

In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.

Write the equations in logarithmic form 9^4=6,561