X is the amount invested at 6%
Y is the amount invested at 9%
0.06X + 0.09Y = 4998
X = 2Y
0.06(2Y) + 0.09Y = 4998
.12Y + 0.09Y = 4998
0.21Y = 4998
21Y = 499800
Y = 499800/21 = 23800
So X = 2*23800 = 47600
$47,600 is invested at 6% and $23800 is invested at 9%
Answer:
The best estimate for the true proportion of all such students who own a Texas Instruments calculator is 0.3.
Step-by-step explanation:
The estimate of the true proportion of all students who own a Texas Instruments calculator is the number of students who own a Texas Instruments Calculator divided by the total number of students.
6 students own a Texas Instruments Calculator
20 total students
p = 6/20 = 0.3
The best estimate for the true proportion of all such students who own a Texas Instruments calculator is 0.3.
Answer:
x = 5.29150262213
x = 2√7
Step-by-step explanation:
x² + 6² = 8²
x² + 36 = 64
x² + 36 - 36 = 64 - 36
x² = 28
√x² = √28
x = 5.29150262213
Answer:
The perimeter is 28 in.
Step-by-step explanation:
We know that the area is 49 square inches and that the area of a square equals length times width. Also, all sides of a square are equal. 7 times 7 equals 49, so the length and width are both 7 inches. The perimeter is equal to all the sides added together. There are four sides in a square, and we know that each side is 7 inches. Therefore, we can add 7+7+7+7 (or multiply 7 times 4) to get the square’s perimeter: 28 inches.
You can estimate down and change 392 to 360, and 360 divided by 9 equals 40