Which of the following statements are TRUE: (1) A system of 3 linear equations in 3 variables always has a unique solution. (2) There is no system of linear equations which has exactly 3 solutions. (3) A system of 3 linear equations in 4 variables never has a unique solution. Group of answer choices

the answer is d

step-by-step explanation:

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.

9 sandwiches per hour

step-by-step explanation:

when we have a rate, we want a 1 in the denominator

27/3 = 9

27 sandwiches/ 3 hours = 9 sandwiches/hour