Answer:
TV = 66
Step-by-step explanation:
Since M is the midpoint, that means the two subsegments are equal so
7x - 2 = 4x + 13
7x - 4x - 2 = 13
7x - 4x = 13 + 2
3x = 15
x = 5
then
TM = 7x - 2 = 7*5 -2 = 35 - 2 = 33
TV = 2 * TM = 2 * 33 = 66
Divide by 5 each side
X+2=4
Subtract 2 from each side
X=2
5(2+2)=20
Does work
In algebra when isolating (leaving alone on one side) x, you do the opposite operation, thus multiplying when you are trying to get rid of a division and vice versa
Answer:
range of scores on final exam student get B is 90 to 100
Step-by-step explanation:
given data
Psychology 101 score = 66
average of his midterm = between 78 and 90
maximum = 100 points
to find out
range of scores on final exam student get B
solution
we consider here lowest marks need in final = x
so average at two marks should be
equation is
average marks = 0.5 × ( mid term marks + final marks ) .................1
put here value
78 = 0.5 × ( 66 + x )
x = 90
and
90 = 0.5 × ( 66 + x )
x = 114
so range 90 to 114
but maximum marks is 100 so
range of scores on final exam student get B is 90 to 100
1. D
2.B
3.A
4. D i think i can’t really see that question
5.C
