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just olya [345]
3 years ago
15

N =⟨−2,  −1⟩ and D=

7D%5Cright%5D" id="TexFormula1" title="\left[\begin{array}{cc}-3&0\\4&1\\\end{array}\right]" alt="\left[\begin{array}{cc}-3&0\\4&1\\\end{array}\right]" align="absmiddle" class="latex-formula">
What is D⋅n?
Mathematics
1 answer:
zepelin [54]3 years ago
5 0

Answer:

6

-9

Step-by-step explanation:

-3(-2) + 0(-1)

4(-2) + 1(-1)

6 + 0

-8 + -1

6

-9

*don't forget to add brackets on each side of every calculation okay :)

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timofeeve [1]

Answer:

3) 12 yd^2

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Step-by-step explanation:

3) 4(2x3x0.5) = 12 yd^2

4) (9x5)-(0.5)(7x5) = 27.5 m^2

5) (10x6)-(6x2) = 48 ft^2

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3 years ago
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((-4)^5)^8 / ((-4)^7)^3

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3 years ago
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2x – y=8
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5 0
3 years ago
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3 years ago
A college student earned $8200 during summer vacation working as a waiter in a restaurant on the boardwalk at the beach. The stu
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Answer:

$3000.

Step-by-step explanation:

Suppose the amount invested at 7% is $X and the amount invested at 10% is $Y (assuming that the college student invested all his/her income on the two schemes). Therefore:

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0.07X + 0.1Y = 664 (The sum of the interest received from the invested amounts is actually the total return).

Now solving these 2 simultaneous equations:

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From (Equation 1):

x = 8200 - y (Equation 3)

Put (Equation 3) in (Equation 2):

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3 years ago
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