Answer:
Step-by-step explanation:
twice the difference of a number and 3 is added to 4
Answer:
j=-2
Step-by-step explanation:
42j+18-19j=-28
Combine like terms
23j +18=-28
Subtract 18 from each side
23j +18-18 = -28 -18
23j =-46
Divide each side by 23
23j/23 = -46/23
j = -2
B. because there is a variable (2b - 5)
Answer:

Step-by-step explanation:
We are given that


We have to find the angle BDC.
In triangle ABC
Sum of interior angles of triangle=180 degrees






Angles subtended on the same are ac are equal.

Answer:
b) ±2
Step-by-step explanation:
3x² = 12
divide each side by 3 to get:
x² = 4
x = ±2