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IrinaK [193]
2 years ago
10

PLZ HELP WILL GIVE BRAINLIEST

Mathematics
2 answers:
Ymorist [56]2 years ago
7 0

Answer:

A) C=6t

Step-by-step explanation:

Brut [27]2 years ago
6 0
C=6t is the a answer
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Use Cramer's Rule to solve the following system: –2x – 6y = –26 5x + 2y = 13
andriy [413]
\bf \begin{cases}
-2x-6y&=-26\\
\quad 5x+2y&=13
\end{cases}\stackrel{\textit{determinant of the coefficients}}{D=
\begin{bmatrix}
-2&-6\\5&2
\end{bmatrix}}\implies (-4)-(-30)
\\\\\\
D=-4+30\implies \boxed{D=26}\\\\
-------------------------------\\\\

\bf x=\cfrac{D_x}{D}\implies x=\cfrac{
\begin{bmatrix}
\boxed{-26}&-6\\\\ \boxed{13}&2
\end{bmatrix}}{D}\implies x=\cfrac{(-52)-(-78)}{26}
\\\\\\
x=\cfrac{-52+78}{26}\implies x=\cfrac{26}{26}\implies \boxed{x=1}\\\\
-------------------------------\\\\
y=\cfrac{D_y}{D}\implies y=\cfrac{
\begin{bmatrix}
-2&\boxed{-26}\\\\ 5&\boxed{13}
\end{bmatrix}}{D}\implies y=\cfrac{(-26)-(-130)}{26}
\\\\\\
y=\cfrac{-26+130}{26}\implies y=\cfrac{104}{26}\implies \boxed{y=4}
4 0
3 years ago
How much vulcanized rubber is needed to make a hockey puck? (Assume<br> the puck is filled solid)*
Aneli [31]

Answer:

Step-by-step explanation:

Givens

d = 3"

h = 1 inch

pi = 3.14

Formula

V = pi r^2 h

Solution

r = d/2

r = 3/2 = 1.5

V = 3.14 * 1.5^2 * 1

V = 3.14 *2.25

V = 7.065

3 0
2 years ago
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padilas [110]

Answer:

36

Step-by-step explanation:

so 50% of 120 is just half of it. so that would be 60. Then 20% of 120 is 24 so subtract that from 60 and you get 36.

5 0
2 years ago
Which polynomial is written in descending order?
Anarel [89]

The ascending or descending order of a polynomial is determined by the increasing or decreasing power of variable “x” respectively.

<span>The question is to find about the polynomial in descending order, so in this case, the 3rd option is correct, i.e. 4x^2 – 3x + 9 or 4x^2 – 3x^1 +9x^0. The power of “x” decreasing from 2 to 1 and then finally to 0.</span>

4 0
3 years ago
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kati45 [8]

Answer:

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Step-by-step explanation:

4 0
3 years ago
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