One alloy is 2 parts iron to 3 parts silver and another alloy is 7 parts iron to 3 parts silver. How much of each should be combined to produce a 30 pound alloy that is 1 part iron to 1 part silver?

If the front of a playhouse is shown in a scale drawing and the height of the door is 1.8 inches. The scale that maps the drawing is 1 inch to 2.5 feet. What is the actual height in feet of the play house door?

Is 4/5 or 9/10 larger when using rational numbers?

Find both unit rates. 374 students for every 20 teachers A. About 0.053 students/teachers and 18.7 teachers/students B. 374 students/teachers and 18.7 teachers/students C. 18.7 students/teachers and about 0.053 teachers/students D.

Which of these systems of linear equations has no solution? A. 2 x + 8 y = 15. 4 x + 16 y = 30. 2 x minus B. y = 18. 4 x + 2 y = 38. C. 4 x + 7 y = 17. 8 x minus 14 y = 36. D. 4 x minus 3 y = 16. 8 x minus 6 y = 34.

Suppose that prices of a gallon of milk at various stores in one town have a mean of $3.96 with a standard deviation of $0.12. Using Chebyshev's Theorem what is the minimum percentage of stores that sell a gallon of milk for between $3.72 and $4.

In class of 40 students report that english is their favorite class 40 percent of the students report that keyboard is there favorite class show the work

A small theater with 200 seats sells two kinds of tickets for a performance. Premium tickets sell for $20 each and Standard tickets sell for $15 each. At a sold-out performance, $3400 was collected in ticket sales.

The marching band has 70 members. The band marches in equal rows of 10 members each. How many rows does the band make? 70 : ___ = 10 A) 8 * 10 = 70 B) 6 * 10 = 70 C) 7 * 10 = 70 D) 10 * 10 = 70

A and b are complementary and congruent. what is the measure of each of these angles?

Identify a pattern in the given list of numbers 1,1/6,1/36,1/216,