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3 years ago

Evaluate the variable expression xyz for the given values of x, y, and z. x = 4/5 , y = −15, z = 7/8

Mathematics

2 answers:

Georgia [21]3 years ago

7 0

Answer:

xyz = - 21 / 2

Step-by-step explanation:

xyz = (4/5)(-15)(7/8) = (4×-15×7)/(5×1×8)

= (4×-3×5×7)/(5×1×4×2)...... because: 15 = 5×3 and 8 = 4×2

xyz = - 21 / 2

Sav [38]3 years ago

6 0

Answer:

The answer is -10.5

Step-by-step explanation:

You can just simply multiply the numbers above.

xyz=(4/5)*(-15)*(7/8)=-10.5

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Answer:

$\boxed{\sf a = 9 }$

Step-by-step explanation:

Two lines are given to us which are perpendicular to each other and we need to find out the value of a . The given equations are ,

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$\large\textsf{\textbf{Calculations\;:}}$

First , take a look at the signs of the numbers we're asked to multiply .

One of them is negative , and the other one is positive .

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$\footnotesize\text{hope\:helpful~}$

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