Plz help for a and b

answer: the common difference is -0.10

57.09 minus 7.0435 equals

step-by-step explanation:

just subtrach them both and u get the answer of 50.0465

the forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?

x > 4

step-by-step explanation:

solve for   x by simplifying both sides of the equation, then isolating the variable.