Answer:
x=3
Step-by-step explanation:
3x+1=10
3x-1=-1
3x=9
÷3=÷3
x=3
I believe the answer is D. let me know if im wrong
Answer:
25%
Step-by-step explanation:
Height of all the bars in chart = 2 or more is 10, 3, 1.
Add all the bars to give us exact amount of data required = 10 + 3 + 1 = 14
Total number of students in class = 56
Percentage of class having two or more student = (14/56) * 100% = 25%
We are given

Firstly, we will simplify left side
and we will check whether it is equal to right side
Left side:
Let's assume y left side expression

now, we can take cos on both sides

we can simplify it

Right side:
Let's assume y left side expression

Multiply both sides by -1

now, we can take cos on both sides

we can simplify it


we can see that
both sides cos(y) value is different
so, this is FALSE.........Answer