Answer:
20
Step-by-step explanation:
PEMDAS!!!
13 - 2(-14) ÷ 4
13 - [(-28) ÷ 4]
13 - (-7)
13 + 7 = 20
80 * 2^0 = 80*1 = 80g (amount initially)
<span>80 * 1/2 = 40 g (amount remaining after one half life) </span>
<span>80* (1/2)^2 = 80* 1/4 = 20 g (amount remaining after 2 half lives).</span>
Step-by-step explanation:
(4z +9) + ( 9y - 2) =180
4z + 9y = 173 ....... Equation 1
The angles of triangle = 180
We miss one angle and in opposite of that angle is 135 so
( 5y +5 +4z +9)+135 = 180
5y + 4z + 149 = 180
5y + 4z = 31 ....... Equation 2
Subtract between two equations 1 & 2
4y = 142
y = 142/4
y = 35.5
The simplified polynomial after standard form will be;
⇒ - 8x² - 43x - 36
What is an expression?
Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.
Given that;
The algebraic expression is;
''The expression (3x + 6)² is subtracted from x² - 7x.''
Now,
We can formulate as;
⇒ (x² - 7x) - (3x + 6)²
⇒ x² - 7x - (9x² + 36x + 36)
⇒ x² - 7x - 9x² - 36x - 36
⇒ - 8x² - 43x - 36
Thus, The simplified polynomial after standard form will be;
⇒ - 8x² - 43x - 36
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8 plus 4 is 12 and 8 would be twice as much as 4 which is the tens place