He can because you can add it mentally. You can just have 23 in your head and count by adding 10 "4" times.
Hope this helped☺☺
Step-by-step explanation:
Given
4y - x = 5 + 2y
Let's make y subject then making in slope intercept form that is y = mx + c
4y - 2y = x + 5
2y = x + 5
y = ( x + 5) / 2
y = x/2 + 5/2
Hope it will help :
by pythagorean formula, the last side is √(61)
by cos rule
cos A
A = 39.81
Hi um I think you posted a picture of something else other than the question!!
