What's x+15=83 I can't do it I've trued so much and I keep grin a different answer

Original:19 new amount:30

Gabriel uses 0.4 gallon of gasoline each hour mowing lawns. How much gas does he use in 4.2 hours

7x 2 + 9 -7x 2 + 10x-6

One-fourth of the members of a committee voted for a change in a sales policy. Without calculating, determine what percent of the committee voted for the change.

Find the difference between 900 and 247

Susans red note book cover is 20 cm by 30 cm she has a sticker for each letter in her name each sticker is a square that measure 3 cm on each side she puts all 5 sticers on her notebook. how much of the red notebook cover is still showing

The percentile rank of 88 is

Convert 135 pounds to kilograms.

Y=2x-1 y=-3x+14 Solve for y

Solve 16.24 divided by 1000