Question

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

1: How do you find 3 4/5x - 2 1/2 for x = -10 step by step?

2: Simplify the expression step by step, listing the property of operations used.
-5/6 X (-5/8) X 6/5 =

Thank you so much!

Answer 1

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 $\frac{a}{b} \times \frac{b}{c} =\frac{a}{c}$}