3 years ago

Let u = <-3, -5>, v = <-3, 1>. Find u + v.

Mathematics

1 answer:

Gemiola [76]3 years ago

3 0

U + v = {-3 + -3, -5 + 1} = <span> {-6 , -4}

</span>u + v = <span> {-6 , -4} </span>

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Evaluate i^31 please help

Nadya [2.5K]

ANSWER

${i}^{31} = - i$

EXPLANATION

We want to evaluate

${i}^{31}$

Use indices to rewrite the expression as:

$= {i}^{30} \times i$

We know that

${i}^{2} = - 1$

So we rewrite the expression to obtain;

$= ({ {i}^{2}) }^{15} \times i$

This gives us;

$= {( - 1) }^{15} \times i$

This simplifies to

$= - 1 \times i$

$= - i$

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3 years ago

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Answer:

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Step-by-step explanation:

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2 years ago

The cube of a number equals 36 times that number.find the number.

labwork [276]

Answer
The answer is 36.
Explanation:
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2 years ago

Read 2 more answers

Count by tens and ones to find the sum of 45+26

galben [10]

45+10= 55
55+10= 65
65+1= 66
66+1= 67
67+1= 68
68+1= 69
69+1= 70
70+1= 71

Because 10+10+1+1+1+1+1+1= 26,
71 is your answer :)

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2 years ago

Find a8 in the arithmetic sequence with a1=-7 and d=0.5

gavmur [86]

$\bf n^{th}\textit{ term of an arithmetic sequence}\\\\
a_n=a_1+(n-1)d\qquad 
\begin{cases}
n=n^{th}\ term\\
a_1=\textit{first term's value}\\
d=\textit{common difference}\\
----------\\
a_1=-7\\
d=0.5\\
n=8
\end{cases}
\\\\\\
a_8=a_1+(8-1)d\implies a_8=-7+(8-1)(0.5)$

and surely you know how much that is.

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3 years ago