Answer:
![x^{2} -12x-45\\=(x-15)(x+3)](https://tex.z-dn.net/?f=x%5E%7B2%7D%20-12x-45%5C%5C%3D%28x-15%29%28x%2B3%29)
Step-by-step explanation:
Answer:
A) log(jk2y = 7log i + 2logk
Step-by-step explanation:
High temperatures were recorded for 30 consecutive days: 50, 45, 49, 50, 43, 49, 50, 49, 45, 49, 47, 47, 44, 51, 51, 44, 47, 46,
Simora [160]
The answer is 21, you subtract the smallest number (30) by the biggest number (51)
Answer:
A) 991=43x+475
B) 12 hours
Step-by-step explanation:
Answer:
x = ![\frac{9}{4}](https://tex.z-dn.net/?f=%5Cfrac%7B9%7D%7B4%7D)
Step-by-step explanation:
Given
-
=
← factor denominator
-
= ![\frac{4}{x(x+1)}](https://tex.z-dn.net/?f=%5Cfrac%7B4%7D%7Bx%28x%2B1%29%7D)
[ x ≠ 0, x ≠ - 1 as these would make the terms undefined ]
Multiply through by x(x + 1)
4x² - 5(x + 1) = 4
4x² - 5x - 4 = 4 ( subtract 4 from both sides )
4x² - 5x - 9 = 0 ← in standard form
(x + 1)(4x - 9) = 0 ← in factored form
Equate each factor to zero and solve for x
x + 1 = 0 ⇒ x = - 1
4x - 9 = 0 ⇒ 4x = 9 ⇒ x = ![\frac{9}{4}](https://tex.z-dn.net/?f=%5Cfrac%7B9%7D%7B4%7D)
However, x ≠ - 1 for reason given above, then
solution is x = ![\frac{9}{4}](https://tex.z-dn.net/?f=%5Cfrac%7B9%7D%7B4%7D)