Breann solved the system of equations below. What mistake did she make in her work?

2x + y = 5

x - 2y = 10

y = 5 - 2x

x - 2 (5 - 2x) = 10

x - 10 + 4x = 10

5x - 10 = 10

5x = 20

x = 4

2 (4) + y = 5

y = - 3

Linda's container of cranberry juice holds 200 ml. Harries container holds 7/8 as much juice. How many milliliters of cranberry juice to both containers old?

There are 30 girls trying out for lacrosse and only 12 made it. There are 40 boys who tried out and only 16 got in. Are the ratios of number of students on the team to number of students trying out the same for both boys and girls? Explain.

What is the percent notation for 8/10

I don't understand : fractions

Josh run 6 miles in 50 minutes how many miles does he run per minute

What is 7,782 rounded to the nearest hundred

Find the slope between (1, 1) and (8, 7)

Can 72 hundredths be reduced?

There are 3 fish tanks. One has 9 fish. One has 11 fish. One has 13 fish. How do I get same number of fish in each tank?

The estimate to 145.4 : 21