Answer:
see in the picture, u can see that JKLM is a parallelogram
=> JK = LM
<=> 3x - 2 = x + 6
<=> 2x = 8
<=> x = 4
with x = 4 => JA = 2.4 - 1 = 7
Answer:
Step-by-step explanation:
AT first, draw the reference line, which are given. If I take PQ as base, I won't need to draw PQ line as reference.
I took PQ(5.5cm) as base. Then, take 4.8cm in your compass by centering at point Q. Draw an arc. Then take 4.2 cm in your compass from the reference line which you have drawn and then centre at point P and draw an arc. Both the arcs will meet at one point. Then join the lines to form the Triangle PQR
780,000 is 780,820 rounded to the nearest ten thousand
Answer:
see explanation
Step-by-step explanation:
Using the cosine addition formula
cos(A ± B ) = cosAcosB ∓ sinAsinB
Then considering the left side
cos²(45 + A) + cos²(45 - A)
= [ cos45cosA - sin45sinA ]² + [cos45cosA + sin45sinA]]²
= [ 
cosA - sinA ]² + [ cosA + sinA ]²
= 
cos²A - sinAcosA + sin²A + cos²A + sinAcosA + sin²A
= cos²A + sin²A
= 1
= right side , then proven
