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Alex Ar [27]
4 years ago
15

Can somebody please help with these two? I'll mark brainliest for your answer!

Mathematics
1 answer:
vlada-n [284]4 years ago
5 0

Answer:

1. -40\dfrac{1}{2}

2. \frac{5}{8}

Step-by-step explanation:

1. We are given an expression that is 3\dfrac{4}{5}x-2\dfrac{1}{2}. We have to find its value for x = - 10

So,  3\dfrac{4}{5}x-2\dfrac{1}{2}

= \frac{19x}{5} -\frac{5}{2}

= \frac{19}{5} \times(-10) -\frac{5}{2} {Putting the value of x}

= -38 - \frac{5}{2}

= -\frac{81}{2}

= -40\dfrac{1}{2} (Answer)

2. (-\frac{5}{6}) \times (-\frac{5}{8} )\times (\frac{6}{5} )

= \frac{5}{6} \times \frac{5}{8} \times \frac{6}{5}

= \frac{5}{8} (Answer){Since \frac{a}{b} \times \frac{b}{c} =\frac{a}{c}}

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