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3 years ago

Help me pleaseeee!!!!!!

Mathematics

1 answer:

lilavasa [31]3 years ago

7 0

The formula for finding the perimeter of any rectangle is 2(width + length).
a) width= x ; length= x+7. Plug them into the formula 2( x+x+7). Combine like terms inside the parenthesis: 2(2x+7). Distributive property: 4x+14 is your answer.

b) Width=y ; length: 2y-1. Plug them into the formula: 2(y+2y-1). Combine like terms inside the parenthesis: 2(3y-1). Distributive property: 6y-2, is your answer.

I'm only doing the first two, the rest you should be able to do them.

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4 years ago

What is |Ay| in the system of linear equations below? -8x+y=6 3x-2y=-1

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3 years ago

Read 2 more answers

MATRECIES: Suppose ={u,v,w}⊆R3 is linearly independent. Determine if the set 4 ={u, v, v−w, u+v+w} is linearly independent or li

AlladinOne [14]

The set is linearly dependent.

To explicitly prove this, we need to show there is at least one choice of constants $c_1,c_2,c_3,c_3\in\Bbb R$ such that

$c_1 u + c_2 v + c_3(v-w) + c_4(u+v+w) = 0$

or equivalently,

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which is the same as solving the system of equations

$\begin{cases} c_1 + c_4 = 0 \\ c_2 + c_3 + c_4 = 0 \\ -c_3 + c_4 = 0 \end{cases}$

From the first and last equations, we have $c_1=-c_4$ and $c_3=c_4$ . Substituting these into the second equation leaves us with $c_2-2c_1=0$ , and so the overall solution set is

$c_1 = \dfrac12 c_2 = -c_3 = -c_4$

for which there are infinitely many not-all-zero solutions.

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2 years ago

I need help on how to do this

REY [17]

Sorry idk how to do that either

8 0

3 years ago