Answer:
(-7,-6),(-7,6) are the possible coordinates of A
Answer:
<B = 56 degrees
Step-by-step explanation:
The sum of two complementary angle is 90 degrees
Hence <A + <B = 90
2x++18 + 6x + 8 = 90
8x + 26 = 90
8x = 90-26
8x = 64
x = 64/8
x = 8
Get <B
<B = 6x+8
<B = 6(8) + 8
<B = 48+8
<B = 56 degrees
Answer:
20
Step-by-step explanation:
Sn = (n/2)(a1 + a1 + d(n-1)), where S = sum, a1 = first term, n = number of terms, d = common difference
400 = (n/2)(1 + 1 + 2(n - 1))
400 = (n/2)(2 + 2n - 2)
400 = (n/2)(2n
400 = n2
20 = n
Twenty numbers are in the set.
Answer: x = 4
Step-by-step explanation:
5x + 34 = -2(1 - 7x)
5x + 34 = -2 + 14x Multiply -2 to 1 and -7x
5x + 36 = 14x Add 2 to both sides
36 = 9x Subtract 5x to both sides
4 = x Divide 9 to both sides