Solutions
In Matrix we use initially based on systems of linear equations.The matrix method is similar to the method of Elimination as but is a lot cleaner than the elimination method.Solving systems of equations by Matrix Method involves expressing the system of equations in form of a matrix and then reducing that matrix into what is known as Row Echelon Form.<span>
Calculations </span>
⇒ <span>Rewrite the linear equations above as a matrix
</span>
⇒ Apply to Row₂ : Row₂ - 2/7 <span>Row₁
</span>
⇒ <span>Simplify rows
</span>
Note: The matrix is now in echelon form.
<span>The steps below are for back substitution.
</span>
⇒ Apply to Row₁ : Row₁ + 4 Row₂
![\left[\begin{array}{ccc}7&0&21\\0&1&2\\\end{array}\right]](https://tex.z-dn.net/?f=%20%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D7%260%2621%5C%5C0%261%262%5C%5C%5Cend%7Barray%7D%5Cright%5D%20)
⇒ <span>Simplify rows
</span>
⇒ <span>Therefore,
</span>
Answer: p>−4
Step-by-step explanation:
Let's solve your inequality step-by-step.
−2−7p<26
Step 1: Simplify both sides of the inequality.
−7p−2<26
Step 2: Add 2 to both sides.
−7p−2+2<26+2
−7p<28
Step 3: Divide both sides by -7.
−7p
−7
<
28
−7
p>−4
Answer:
give branliest pls
Step-by-step explanation:
Answer:
3
Step-by-step explanation:
30% is 30/100 reduce to 3/10.
Answer:
Slope =
, X-intercept = 8 , Y-intercept = -4
Step-by-step explanation:
the following equation is given in slope intercept form which is y = mx + b where m is the slope and b is the y intercept
since m =
and b = -4, we can say our slope is
and y intercept is -4.
Recall that x intercept occurs when y = 0 so plug y = 0 in the equation then solve for x
0 =
x - 4
add 4 to both sides,
4 =
x
multiply by 2 on both sides,
4*2 = x
8 = x
x = 8
so our x-intercept is 8