Numbers are arranged by their place values. Place values give a quantity of value to a certain digit in a number. Given a number, the rightmost number is the ones place, followed by the tens place, hundreds, thousands, ten thousands, hundred thousands, millions, ten millions, hundred millions, as so on and so forth. The place value of a certain digit is 10 times bigger than its adjacent digit to the right.
So for this problem, all you have to do is multiply the number of units of each place value, then multiple them all by 10.
(2(10) + 1(1))×10
21 × 10 = 210
Therefore, the number is equivalent and written as 210.
Answer:
11
Step-by-step explanation:
Use a calculator. Punch in 5.5, then use the divide symbol (÷) and finally put in 0.5, then you will get 11 as your final answer.
Hope this helps!
Answer: y is the dependent variable
Step-by-step explanation:
In mathematics, a function is a rule for taking an input and providing an output.
A symbol that stands for an arbitrary input is called an independent variable.
A symbol that stands for an output that depends on the value of a independent variable is called a dependent variable.
y = 12x } Function
x is the independent variable = arbitrary number of hours worked.
y is the dependent variable because depends on the value of x.
<h2><em>Spymore</em></h2>
The percentage of increase was 87.027... %
<em><u>Explanation</u></em>
The value of U.S exports to China increased from $1480 million to $2768 million.
Suppose, the percentage of increase is 
So, <u>the amount of increase</u> = of 1480 
Thus, the equation will be......
So, the percentage of increase was 87.027... %
Answer:
k = - 
, k = 2
Step-by-step explanation:
Using the discriminant Δ = b² - 4ac
The condition for equal roots is b² - 4ac = 0
Given
kx² + 2x + k = - kx ( add kx to both sides )
kx² + 2x + kx + k = 0 , that is
kx² + (2 + k)x + k = 0 ← in standard form
with a = k, b = 2 + k and c = k , thus
(2 + k)² - 4k² = 0 ← expand and simplify left side
4 + 4k + k² - 4k² = 0
- 3k² + 4k + 4 = 0 ( multiply through by - 1 )
3k² - 4k - 4 = 0 ← in standard form
(3k + 2)(k - 2) = 0 ← in factored form
Equate each factor to zero and solve for k
3k + 2 = 0 ⇒ 3k = - 2 ⇒ k = -
k - 2 = 0 ⇒ k = 2
