Answer:
More than half the students scored 81 or better on the test
There were 12 students who scored 80 on the test
The same number of students scored between 81 and 90 on the test as scored between 61 and 80.
Step-by-step explanation: Please think this through, I don't know if I'm correct. It is either all or one of these
5 + 5 + 5 + 5 equals 550 lgjf8654
To solve this question you need to cross multiply
So first do 3(2x+1) = 4(3x-2)
Which gives you 6x+1 = 12x-8
Now you solve it like a normal equation
6x+1 = 12x-8
9 = 6x
3/2 = x
Answer:
Step-by-step explanation:
We are asked to represent
as the product of the GCF and another sum.
First of all, we will find the greatest common factor of 18 and 24.
Factors of 18: 1, 2, 3, 6, 9, 18.
Factors of 24: 1, 2, 3, 4, 6, 8, 12, 24.
We can see that greatest common factor of 18 and 24 is 6. Let us write our given expression as product.
Factor our 6:
Therefore, our required expression would be
.
Commercial jet's speed = 2x-162 (plug this in the equation below)
Private jet's speed = x
Equation:
10(x) = 8(2x-162)
10x = 16x - 1296
6x = 1296
x = 216 (Private jet's speed)
Take the first equation and plug x value in;
2x-162
2(216) - 162 = 270 ( Commercial jet's speed)