We can use ratios and the cross-multiply-divide to find this.
The ratio 21:5 is avaliable via the question. We then need to compare that to the ratio x:100, the 100 being the percent and the x being the number of airplane parts.
21/5 = x/100
We can then solve for x to find the number of airplane parts. First we multiply by 100 on both sides to get 2100/5 = x. Therefore x = 420 and there are 420 airplane parts.
If three times the sum of eight and a number is sixty, then you need to break it down to write it out. First, we know we're multiplying 3 * (times) something. That something is 8 and a number, or x. So it'd be 8 + x. So we have 3 * (8 + x). And we know that equals 60, so we have 3 * (8 + x) = 60
The side are 15,15,2,2 because if one side is 30 the other side should be 30 not one so that os wrong this is the correct answer.
area=15×2=30 sq. meters
perimeter=15+15+2+2=34
Answer:
Step-by-step explanation:
mean: To calculate the mean, add the values together and divide the total by the number of values.
median: If you place a set of numbers in order, the median number is the middle one. If there are two middle numbers, the median is the mean of those two numbers.
The mode is the value that occurs most often. The mode is the only average that can have no value, one value or more than one value. When finding the mode, it helps to order the numbers first.
The range is the difference between the highest and lowest values in a set of numbers. To find it, subtract the lowest number in the distribution from the highest.
if you need more explanations on anything, or you don't understand. let me know.