During a dig, an archaeological team starts at an elevation of −512 feet. at a rate of 234 feet per hour, the team digs deeper into the surface for 312 hours. for the next 412 hours, the team digs at a rate of 1512 feet per hour. then the team quits for the day.

The rate of their dig is 2 3/4 ft per hr for 3 1/2 hours, then the total distance dug after 3 1/2 hours should be: 9 5/8 ft

Here’s how we get the total distance:

 First, change mixed number into improper fraction and proceed to multiplication

2 3/4--> 11/4  and  3 1/2  becomes 7/2

Multiply.

11/4  x  7/2  = 77/8

Simplify 77/8--> 9 5/8 ft

Let us move on at the rate of 1 5/12 ft per hr for the next 4 1/2 hr,

Following the same procedure as above, the distance would be: 6 9/24 ft

Distance= 1 5/12 x 4 1/2

       = 17/12 x 9/2

       = 153/24

       = 6 9/24 ft

Thus,to sum up everything, they have a total dug of:

 9 5/8 + 6 9/24 = 9 15/24 + 6 9/24 = 16 ft

Then, their elevation on that day is -5 1/2 - 16 = -21 1/2 ft

answer: a video game has three difficulty levels: easy, medium, and expert. the game's scoring works in such a way that a player has to score a fixed number of points to advance to the next level, and then the scoring starts over. the total score needed to clear all three difficulty levels is 7,500. two times the number of points needed to clear the easy level is 500 more than the number of points needed to clear the medium level. twice the number of points needed to clear the medium difficulty level is 1,500 more than the number of points needed to clear the expert level. if x, y, and z represent the easy, medium, and expert levels, respectively, and a is the coefficient matrix of the system of equations modeling this situation, identify the inverse matrix, a-1, and the solution matrix, x, of the system of equations.

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answers

rauschg

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step-by-step explanation:

just sum

10 + 10 = 20