How do I solved this problem

7+9*3-1=25

Determine if each pair of ratios or rates is equivalent 15 computers for 45 students; 45 computers for 135 students

What is an integer that is divisible by 2

Rob is saving to buy a new MP3 player. For every $15 he earns babysitting, he saves $6. On Saturday, rob earned $75 babysitting. How much money did he save?

Which estimate is the most reasonable for this problem? The distance to Louisa's grandparents' house is 791 miles. Louisa and her family have driven 114 miles. How much farther does Louisa's family need to drive? A. 500 mi B. 550 mi C. 600 mi D.

Tina's mums cooked 50 dishes Vida mum cooked 20 dishes how many dishes did they cook altogether

In a lab, a scientist is growing bacteria for a study. The scientist begins with a bacteria population of b cells. She discovers that after 3 hours, the population of bacteria is b2 cells. Three hours later, the bacteria population is b3 cells.

What is - √61 to the nearest integer and nearest tenth?

This school is also thinking of changing their mascot to an armadillo. To change mascot, a 55% supermajority is needed. How many of the 240 students need to vote "yes" for the mascot to change

The cost of controlling emissions at a firm is given by C (q) = 4,000 + 100q2 where q is the reduction in emissions (in pounds of pollutant per day) and C is the daily cost to the firm (in dollars) of this reduction.

You have a fishing line spool with an end that has an area of 20.0 cm2. how much fishing line do you need to wind around the spool 10 times?