Step-by-step explanation:
Additive inverse of [tex] \sf \dfrac{7}{8} [/tex] is [tex] \sf -\dfrac{7}{8} = \dfrac{1}{8}[/tex] .
Multiplicative inverse of [tex] \sf -\dfrac{70}{21} [/tex] is [tex] \sf - \dfrac{21}{70} = -{3}{10} [/tex]
[tex]\sf -\dfrac{3}{10}-\dfrac{1}{8}[/tex]
[tex]\sf \Longrightarrow -\dfrac{4}{10} = -\dfrac{2}{5}[/tex]
23/40 is the correct answer
additive inverse of 7/8 is -7/8 and multiplicative inverse of -70/21 is -21/70 which is equal to -3/10 in the simplest form, now subtracting -7/8 from -3/10 = (-7/8) - (-3/10) = 23/40
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Answers & Comments
Step-by-step explanation:
Additive inverse of [tex] \sf \dfrac{7}{8} [/tex] is [tex] \sf -\dfrac{7}{8} = \dfrac{1}{8}[/tex] .
Multiplicative inverse of [tex] \sf -\dfrac{70}{21} [/tex] is [tex] \sf - \dfrac{21}{70} = -{3}{10} [/tex]
[tex]\sf -\dfrac{3}{10}-\dfrac{1}{8}[/tex]
[tex]\sf \Longrightarrow -\dfrac{4}{10} = -\dfrac{2}{5}[/tex]
23/40 is the correct answer
additive inverse of 7/8 is -7/8 and multiplicative inverse of -70/21 is -21/70 which is equal to -3/10 in the simplest form, now subtracting -7/8 from -3/10 = (-7/8) - (-3/10) = 23/40