-----------------------------------------------------------
1. x(x+3) = x²+3x
Step by Step:
Apply the Distributive law: (a=x, b=x, c=3)
= xx + x × 3
= xx + 3x
= xx = x²
= x²+3x
-----------------------------------------------------------
2. 3x(4x-7) = 12x²-21x
Step by Step:
Apply the Distributive law: a(b-c) = ab - ac
(a=3x, b=4x, c=7)
= 3x × 4x - 3x × 7
= 3 × 4xx - 3 × 7x
= 12x² - 21x
-----------------------------------------------------------
3. -5x(6x-2) = -30x²+10x
Step by Step:
Apply the Distributive law: a(b-c) = ab - ac
(a = -5x, b = 6x, c = 2)
= -5x × 6x - (-5x) × 2
Apply minus - plus rule: -(-a) = a
= -5x × 6xx + 5 × 2x
= -30x² + 10x
-----------------------------------------------------------
1. x(x+3) = x²+3x
2. 3x(4x-7) = 12x²-21x
3. -5x(6x-2) = -30x² + 10x
Answer:
The volume of the Pacific Ocean, representing about 50.1 percent of the world's oceanic water, has been estimated at some 714 million cubic kilometers or 171 million cubic miles.
Explanation:
According to Stanford-Binet Intelligence Scale, his IQ score of Logan comes out to be 120, which represents that Logan is a high achiever child.
<h3>
What is an IQ score?</h3>
IQ stands for Intelligence Quotient. It is a score describing the intelligence level of a human which is determined by testing some standardized characteristics within an individual.
Given values:
Mental age: 12
Normal age: 10 years
Computation of IQ score:
Therefore, his IQ score of Logan is 120 which shows that he is a high achiever person under the Stanford-Binet Intelligence Scale.
Learn more about the IQ score in the mentioned link:
brainly.com/question/14377171
#SPJ1
Bases increase the concentration of hydronium ions by donating hydroxide ions to water molecules is False.
<u>Explanation:</u>
Bases are counterparts of acids. They take Hydronium protons from water, and increase the OH- I ions in the solution. One example for this could be ammonia.
When ammonia is added to a solution it accepts a proton of hydronium and becomes ammonium ion.
Solutions which posses’ higher concentrations of hydronium are called acidic solutions and those possessing lower concentrations of hydronium ions are basic in character. Also, pure water is neither acidic nor basic; therefore the concentration of hydronium ions in pure water is neutral.
