What is 187 rounded to the nearest ten

What is 645 rounded to the nearest ten

Which expression is equivilent to 9x-3y-5x+7y+x+y. a=5x2 + 4y2. b = 10xy. c = 5x+5y. d = 4x + 4y

Mike says he can find a fraction equivalent to 1/10, even through 1/10 is a unit fraction. Is mike correct? Explain

In a given school, there are 240 boys and 260 girls. a) What is the ratio of the number of girls to the number of boys? b) What is the ratio of the number of boys to the total number of pupils in the school?

What's the nth term of the sequence?1, 1/32,1/243,1/1024,1/3125

What is 8-p/2 is less than or equal to 4?

Convert 3,200,000 to a scientific notation

Lulu bought 2 blouses for $24 each and 3 pairs of socks for $7 each, tax included. How much change would she receive if she paid with bills totaling $80? Choose exactly two answers that are correct. A. division B. multiplication C. subtraction

2y + 5x - z = 4y + 6x solve for y

I'm not quite sure how to do this question: - 2 (35-5y)