To multiply these expression, multiply the numeric parts, and sum the exponents of the literal parts (because the variable is the same: we're using the power property $a^b\cdot a^c = a^{b+c}$ ).

So, you have:

$3z^7 \cdot (4z^2) = 3\cdot 4 \cdot z^{7+2} = 12z^9$
$6a^5 \cdot (6a^5) = 6\cdot 6 \cdot z^{5+5} = 36z^{10}$
$6b^4 \cdot (-3b^4) = 6\cdot (-3) \cdot b^{4+4} = -18b^8$
$5x^4 \cdot (4x^2) = 5\cdot 4 \cdot x^{4+2} = 20x^6$

3 0

3 years ago

Based on the markings, EXPLAIN why each figure is or is not be a parallelogram.

Leviafan [203]

You need two // sides. Thus this figure doesnt show that

3 0

4 years ago

David is making a wall out of bricks. Each brick is 2/3 foot long. There are 20 bricks lined up end to end to make the wall. Wha

Law Incorporation [45]

The total length of wall is 160 inches

Solution:

Given that,

$Length\ of\ each\ brick = \frac{2}{3}\ foot$

1 feet = 12 inches

Therefore,

$Length\ of\ each\ brick = \frac{2}{3} \times 12\ inches = 8\ inches$

There are 20 bricks lined up end to end to make the wall

To find: Total length of wall in inches

$Total\ length\ of\ wall = \text{length of each brick } \times \text{ total number of bricks}$

Thus we get,

$Total\ length\ of\ wall = 8 \times 20\\\\Total\ length\ of\ wall = 160\ inches$

Thus total length of wall is 160 inches

8 0

3 years ago

12 is 25% of what number

SashulF [63]

48? 12 times 4 is 48 and 1 part of 4 is 25%

3 0

4 years ago