Brock is training for a crossfit competition. he began the training completing pull-ups and box jumps origanally, his training plan had him completing and box jumps at a ratio of 5: 4 after two months of his training , he decided to focus on his leg strength and adjusted his ratio 2: 7. if he completed 63 box jumps at the end of his training , how many pull-ups and hos box jumps at the of his training, how many pull-ups did he completed in the initial stage of training

If the adjusted ratio was 2:7, then

2x is the number of pull-ups

and

7x is the number of box jumps.

You can state that since he completed 63 box jumps at the end of his training, then

7x=63,

x=9

and

2x=18.

The total number of exercises performed is 2x+9x=18+63=81.

As at start the ratio was 5:4, then

5y was the number of pull-ups

and

4y was the number of box jumps.

Therefore, 5y+4y=81,

9y=81,

y=9

and 5y=45, 4y=36.

Initially: 45 pull-ups and 36 box jumps. At the end: 18 pull-ups and 63 box jumps.

step-by-step explanation:

ok so im not 100% sure but you would start by adding 5.1t and 1.9t beacuse they have the same variable. that is 7t.   then add -3.6 + 1.2 which is -2.4

so then keep that as -2.4 + 7t. i apologize if this is incorrect. best luck on your test < 3

3

step-by-step explanation:

because where the point where the 2 lines intersect is (3,-1) the x value is 3