Solve the system of equations.
3x + 2y + 4z = 7
4x + 3y + 5z = 9
7x + 4y + 72 = 5
a. (x=-5, y = 3,2 = 4)
b. (x = -6, y = 4,2 = 5)
c. (x = -3, y = 1, 2 = 6)
d. (x=-4, y = 2, 2 = 3)

mark brainliest

step-by-step explanation:

2 tens + 6 ones

1 ten + 16 ones

0 tens + 26 ones

walter needs to make at least 5 more cookies but no more than 40. 5 ≤ x ≤ 40

step-by-step explanation:

20 ≤ x + 15 ≤ 55

subtract 15 from all parts

20-15 ≤ x + 15-15 ≤ 55-15

5 ≤ x ≤ 40

this means how many more cookies he has to make

walter needs to make at least 5 more cookies, but no more than 40 cookies; 5 ≤ x ≤ 40

answer: what in the world is this

step-by-step explanation: