Answer: 36 shirts and costs $432
step by step:
first make an equation with the amount of sold shirts being equal to cost of making them -
12x=10x+72 where x is the number of shirts
then, subtract 10x from 12x to get the variable on the same side -
2x=72
finally, divide by 2 to isolate x
x=36 shirts
to figure out the cost, substitute 36 for x in 10x+72
10(36)+72= 360+72= $432
Answer:
27 units²
Step-by-step explanation:
Cut the figure into a 8 by 3 rectangle and triangle.
The area of the rectangle is 8*3 or 24
The area of the triangle is 3 using the formula 1/2bh where the base and height are 3.
Adding those 2 areas together 24+3 will equal 27
Answer:
252
Step-by-step explanation:
The number of integers from 100 to 999 is 999 - 100 +1 = 900.
Consider the number of three-digit integers that <em>do not contain 4 </em>as a digit.
For the <em>hundreds</em> digit, there are 8 possible choices (excluding 0 and 4).
For the <em>tens digit</em>, there are 9 possible choices (excluding 4).
For the <em>ones</em> <em>digit,</em> there are 9 possible choices (excluding 4)
Thus, there are 8 × 9 × 9 = 648 three-digit integers without a 4.
The number of three-digit integers with at least one 4 is 900 - 648 = 252.
