<span>The total number of students = 280
Sum of ages of children = 3238
Let the number of children of ages 11 year old = x
and the number of children of ages 12 year old = y
Equation 1. x+y=280
Equation 2. 11x + 12y = 3238
From Equation1. y= 280-x
Now, put the value of Y in equation 2 which gives 11x+12(280-x) = 3238
from this, 11x + 3360-12x = 3238
x = 3360-3238
x = 122 = children of age 11 years.
putting value of x in equation 1,
122+y = 280
y = 280-122
y =158 = children of age 12 years
Answer. children of age 11 years =122</span>
I guess the correct answer is An increase in the costs of exploration and drilling for oil
A leftward shift of the supply curve for oil in the United States is most likely to result from an increase in the costs of exploration and drilling for oil.
Answer:
The correct answer to the following question is option C) $15,000 .
Explanation:
Harley signed and gave a blank check to the Pro accountants , and giving them them the authority to fill the amount by themselves but she had already came to an agreement with Pro accountant that the amount they would fill is $10,000 . But Pro accountants didn't do that, instead they filled the check for $15,000 , and gave the check to valley bank , now the valley bank has the full authority to enforce the full $15000 amount .
an economy produces 2,400 units of output, employing 60 units of input, and the price of the input is $30 per unit. the level of productivity in this economy is 40
<h3>
What is productivity?</h3>
- It is possible to study patterns in salary growth, wage levels, and technical advancement by further segmenting labor productivity.
- Productivity increase is directly related to corporate earnings and shareholder returns.
- Productivity is a measure of a company's production process efficiency at the corporate level.
- It is calculated by comparing the number of units produced to employee labor hours or by comparing the company's net sales to employee labor hours.
- Productivity is calculated as a company's output divided by the units utilized to produce that output.
- In the workplace, productivity simply refers to how much "work" is completed in a given amount of time.
To learn more about productivity with the given link
brainly.com/question/23987161
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