3 years ago

A student attempted to generate an equivalent expression using the distributive property, as shown below:

Mathematics

1 answer:

Stells [14]3 years ago

4 0

He didn't multiply the y by 7

$7(y-5) = 7y-35$

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Given vectors u=7i + 3j and v=-4i + 3j, find 5u-4v in terms of unit vectors i and j

il63 [147K]

Answer:

$5u - 4v = 51i + 3j$

Step-by-step explanation:

The given vectors are u=7i + 3j and v=-4i + 3j, find 5u-4v in terms of unit vectors i and j.

We substitute the vectors to get:

$5u - 4v = 5(7i + 3j) - 4( - 4i + 3j)$

We perform the scalar multiplication to get:

$5u - 4v = 35i + 15j + 16i - 12j$

Group the components;

$5u - 4v = 35i + 16i + 15j- 12j$

We simplify to get:

$5u - 4v = 51i + 3j$

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3 years ago

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lesantik [10]

Answer:

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Step-by-step explanation:

Xy^2/-5 becomes (9)(1^2) / (-5) when x = 9 and y = 1.

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2 years ago

Please help me with this geometry question and show work

soldi70 [24.7K]

(3) 8

Step-by-step explanation:

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2 years ago

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Mrac [35]

Answer:

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Step-by-step explanation:

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5?10 5 5, dot, 10, start superscript, 5, end superscript is how many times as large as 1\cdot10^51?10 5 1, dot, 10, start supers

max2010maxim [7]

Answer:

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Step-by-step explanation:

The ratio of the two numbers tells you how many times as large one is as the other:

$\dfrac{5\cdot 10^5}{1\cdot 10^5}=\dfrac{5}{1}\cdot\dfrac{10^5}{10^5}=5$

4 0

3 years ago