X=-1 find the value of x

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

Which of the following could be the ratio of the length of the longer leg 30-60-90 triangle to the length of its hypotenuse? check all that apply. a. 313 6 b. 3: 215 c. 18: 13 d. 1: 13 e. 13: 2 of. 3: 15

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"