3 years ago

Math HW, please help:

Mathematics

2 answers:

LiRa [457]3 years ago

5 0

What is 76+80000000000000000????? I need to know

Phantasy [73]3 years ago

3 0

This is wayyyy to wordy to figure out. I’d check with your teacher about this question.

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Use Cramer's Rule to solve the following system: –2x – 6y = –26 5x + 2y = 13

andriy [413]

$\bf \begin{cases}
-2x-6y&=-26\\
\quad 5x+2y&=13
\end{cases}\stackrel{\textit{determinant of the coefficients}}{D=
\begin{bmatrix}
-2&-6\\5&2
\end{bmatrix}}\implies (-4)-(-30)
\\\\\\
D=-4+30\implies \boxed{D=26}\\\\
-------------------------------\\\\$

$\bf x=\cfrac{D_x}{D}\implies x=\cfrac{
\begin{bmatrix}
\boxed{-26}&-6\\\\ \boxed{13}&2
\end{bmatrix}}{D}\implies x=\cfrac{(-52)-(-78)}{26}
\\\\\\
x=\cfrac{-52+78}{26}\implies x=\cfrac{26}{26}\implies \boxed{x=1}\\\\
-------------------------------\\\\
y=\cfrac{D_y}{D}\implies y=\cfrac{
\begin{bmatrix}
-2&\boxed{-26}\\\\ 5&\boxed{13}
\end{bmatrix}}{D}\implies y=\cfrac{(-26)-(-130)}{26}
\\\\\\
y=\cfrac{-26+130}{26}\implies y=\cfrac{104}{26}\implies \boxed{y=4}$

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4 years ago

Which property is shown? If m ABC = m CBD, then m CBD = m ABC reflexive property substitution property symmetric property transi

trapecia [35]

The correct answer for the question that is being presented above is this one: "symmetric property." Symmetric Property has the property of a = b, then b = a. This property is one of the equivalent properties of equality.
m ABC = m CBD, then m CBD = m ABC.

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4 years ago

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A tree 6m high casts a shadow 4m long. What angle do the sun's rays make with the ground?

Tatiana [17]

high length:6mletngh of shadow =2~3mø is angle ofelevation

Step-by-step explanation:

hope it helps

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