How can the subtraction problem 9−4 be rewritten as an addition problem?

(−9)+(−4)
(−9)+4
9+(−4)
9+4

0.50 , 0.75

step-by-step explanation:

answe: it will take 4.5 hours for naomi and clair to paint an equal number of square feet

hope i

-lavira : )

chemists are often responsible for designing a chemical reaction and analyzing the products obtained from it. one significant part of designing a chemical reaction is determining the amount of each reactant that is needed and the amount of each product that will be produced. in order to do so, chemists use stoichiometry, the quantitative relationships between reactants and products.