Answer: a11 = 3, a12 = 7, a21 = 1, a22 = -4
<u>Explanation:</u>
3x + 7y = 20
x - 4y = 9
A = ![\left[\begin{array}{ccc}3&7&20\\1&-4&9\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D3%267%2620%5C%5C1%26-4%269%5Cend%7Barray%7D%5Cright%5D)
<u>column 1 </u> <u>column 2</u>
row 1: (a11) 3 (a12) 7
row 2: (a21) 1 (a22) -4
Answer:
y = (x-0)^2 + (-5) ⇒ y = x^2 - 5
Step-by-step explanation:
The general vertex form of the parabola y = a(x - h)² + k
Where (h,k) is the coordinates of the vertex.
As shown at the graph the vertex of the parabola is the point (0, -5)
So,
y = a(x-0) + (-5)
y = ax^2 - 5
To find substitute with another point from the graph like (1,-4)
So, at x = 1 ⇒ y = -4
-4 = a * 1^2 - 5
a = -4 + 5 = 1
<u>So, the equation of the given parabola is ⇒ y = x^2 - 5</u>
<h3>I’ll teach you how to solve 5x^3 - 3x^2 - 14x</h3>
--------------------------------------------------------
5x^3 - 3x^2 - 14x
Factor out the common term x:
x(5x^2 - 3x 14)
Factor 5x^2 - 3x 14:
Break the expression into groups:
(5x62+7x)+(-10x-14)
Factor out x from 5x^2+7x:
x(5x+7)
Factor out -2 from -10x-14:
-2(5x+7)
x(5x+7)-2(5x+7)
Factor out the common term 5x+7:
(5x+7)(x-2)
x(x+7)(x-2)
Your Answer Is x(x+7)(x-2)
Plz mark me as brainliest :)
Answer:
answer is below. you can use photo math
Step-by-step explanation:
B.Acute triangle
You have to square all three numbers which would be 100, 100, and 81. The next step is adding the two shortest sides, which would be 100 & 81. The sum of those two sides add up to 181. If the sum is greater than the 3rd side squared than it would be acute. If the sum and the third side squared were equal it would be a right triangle. If the 3rd side squared was greater than the sum of the two sides squared it would be obtuse
