Astudy is done to compare the fuel efficiency of cars. cars in group 1 generally get about 23 miles per gallon. cars in group 2 generally get about 44 miles per gallon. compare the groups by their means. then make an inference and give a reason the inference might be true.

i dont know

step-by-step explanation:

-7

step-by-step explanation:

x^2 + 18x + 74 = (x + 9)^2 - 81 + 74

= (x + 9)^2 - 7.

so q = -7.

answer: 2x + 2 − 2 = 10 − 2; subtraction property of equality

step-by-step explanation:

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons