4. Find the mistake and correct, 10x+7y=-
- 7x-2y-1
STEP 41 2 (lóx+ 7y=-1)
77-4x-2y=-1)
STEP #2 20x+144 = - 22
-498-my
- 29x = -23
-29
-29
X
23 름 or x = 0.99
10 (0.79) + 7y=-11
7.9+7y=-
STEP 3:
-7.9
+y=-11.9
+
y=-1.7
(0.79,-17)
STEP 4:
a) At what step did the make mistake occur?
b) Describe the mistake.

Me with geometry ! in this figure, bc is a perpendicular bisects of kj. dm is the angle bisects of bdj. what is the measure of bdm? •60° •90° •30° •45°

Acompany manufactures three types of cabinets. it makes 110 cabinets each week. in the first week, the sum of the number of type-1 cabinets and twice the number of type-2 cabinets produced was 10 more than the number of type-3 cabinets produced. the next week, the number of type-1 cabinets produced was three times more than in the first week, no type-2 cabinets were produced, and the number of type-3 cabinets produced was the same as in the previous week.

What would be the reasons for lines 3 and 4? a. addition property; subtraction property b. addition property; solve c. substitution property; subtraction property d. substitution property; prove