Martin was given this expression to simplify: 23x + xy - y + 3y +5 - 20x + 6xy
What were Martin's errors? Check all that apply.
The combined coefficients of the x terms should be
3x, not 43x.
He simplified the expression to:
43x + 7xy -3y
The 7xy should be -7xy.
The coefficients of the y terms have been multiplied.
When you combine like terms, you add or subtract
the coefficients.
The constant was left off.
The terms xy and 6xy are not like terms because
there are two variables.

Step-by-step explanation:

Answer: d. 39 cmin the diagram, the approximate length of the minor arc de is 39 centimetres.step-by-step explanation: the formula for the length of an arc in a circle is as displayed below.let the length of the minor arc de = xx = 2( pi )r × angle of sector / 360°from this, we will substitute the values given from the problem into the formula to obtain the length of the minor arc de.x = 2( pi )r × angle of sector / 360°r = radius = 25cmpi as an approximate value = 3.14angle of sector = 120°x = 2( 3.14 )( 25 ) × 120° / 360°x = 157 × 1 / 4x = 39.25x = 39 ( rounded to the nearest whole number as an approximate value )