Ans
there should be one variable
eqn = 3x = 9
x=9/3
therefore x=3
Step-by-step explanation:
Answer: 10% is the correct option.
Explanation:
when energy is passed in an ecosystem from one food chain level to the next, only ten percent of the energy will be passed on.
The amount of energy at each food chain level decreases as it moves through an ecosystem. As little as 10 percent of the energy at any food chain level is transferred to the next level, the rest is lost largely through metabolic processes as heat.
Answer: Producers is the base of a food web.
Explanation:
At the base of the food chain lie the primary producers. The primary producers are autotrophs and are photosynthetic organisms such as plants, algae, etc.
Four CDs must be bought to receive a gift card from an <em>online</em> store.
<h3>How to determine the least number of CDs to be bought to receive a gift card</h3>
The <em>total</em> costs are equal to the sum of the <em>shipping</em> cost and the total related to the number of <em>acquired</em> CDs (n). The number of gift cards (m) is equal to the total costs divided by <em>minimum spent</em> money, that is, $ 50. We need to solve the following inequation to find the minimum quantity of CDs:
(12 · n + 5)/50 > 1
12 · n + 5 > 50
12 · n > 45
n > 45/12
n > 3.75
Four CDs must be bought to receive a gift card from an <em>online</em> store.
To learn more on inequalities: brainly.com/question/20383699
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I am doing with Question Number 2
Let the two numbers be 'x' and 'y'.
According to the question, the product of two numbers is 14.
So, xy=14 (Equation 1)
Now, one of the numbers is 3 ½ times the other.
So, 
(Equation 2)
Substituting the value of 'x' from equation 2 in equation 1, we get
So, y= 2 and -2
So, 
and 
x=7 and -7
Numbers are 2,7 and -2,-7.
Sum of numbers 2 and 7 = 9
Sum of numbers -2 and -7 = -9.
