3 years ago

When should you use multiplication to solve a system of linear equations by elimination

1 answer:

4 0

To use the elimination method you need the same variable in each equation to have the same coefficient. If neither variable has the same coefficient in each equation, you need to multiply one or both of the equations by a constant to get the same coefficient.

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8.50284 × 10-2 standared form

Lerok [7]

0.0850284. Move the decimal back two spaces from original spot. You would move forward if it was a positive exponent.

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3 years ago

4b+3=-9 <br> whaT DOES B equal

TEA [102]

Answer:

result bellow

Step-by-step explanation:

b= -4.

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Read 2 more answers

What is the first term in a geometric sequence if the common ratio is − 2 and the sum of the first six terms is −105?

Serggg [28]

$\bf \qquad \qquad \textit{sum of a finite geometric sequence}
\\\\
S_n=\sum\limits_{i=1}^{n}\ a_1\cdot r^{i-1}\implies S_n=a_1\left( \cfrac{1-r^n}{1-r} \right)\quad 
\begin{cases}
n=n^{th}\ term\\
a_1=\textit{first term's value}\\
r=\textit{common ratio}\\
----------\\
r=-2\\
n=6\\
S_6=-105
\end{cases}$

$\bf -105=a_1\left( \cfrac{1-(-2)^6}{1-(-2)} \right)\implies -105=a_1\left( \cfrac{1-(64)}{1+2} \right)
\\\\\\
-105=a_1\left( \cfrac{-63}{3} \right)\implies -105=a_1(-21)
\\\\\\
\cfrac{-105}{-21}=a_1\implies 5=a_1$

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3 years ago

3/8 of flower garden are red and 3/6 are yellow which is greater, less than or equal

kirill115 [55]

Answer:

3/8 < 3/6

This is because, when the common denominator (24) is found, the fractions are 9/24 (red) and 12/24 (yellow).

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Triangle ABC is reflected over the y-axis. The coordinates of

Ira Lisetskai [31]

I am Pretty sure it’s b but I wouldn’t be 100%

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