Answer:
B
Step-by-step explanation:
In a triangle, the sum of any two sides must be bigger than the third.
For the first one, 10+20=30 is not greater than 30, so this is not correct.
For B, 122+137 = 259 > 257, 257+137>122 , and 257 + 122 > 137. This works
For C, 8.6 + 2.7 = 11.3 < 12.2, so this does not work
For D, 1/6 + 1/5 = 5/(6*5) + 6/(6*5) = 5/30 + 6/30 = 11/30 < 1/2 = 15/30, so this does not work
The simultaneous equations are
2x - 7y = 4 (1)
3x + y = -17 (2)
Write (2) as
y = - 3x - 17 (3)
Substitute (3) into (1).
2x - 7(-3x - 17) = 4
2x + 21x + 119 = 4
23x = -115
x = -5
This is the equation obtained after substituting y from the second equation into the first equation.
The solution for y is
y = -3(-5) - 17 = -2
Answer: x = -5
Note: The solution is x = -5, y = -2.
9 inches* 6 beads per inch= 54 beads used.
The integer to represent the change in how many beads you have now is -54 since 54 were used up to make the necklace. You now have less beads than before, so the number should be negative.
Let's simplify step-by-step.
2(x+7)+3(x+1)
Distribute:
=(2)(x)+(2)(7)+(3)(x)+(3)(1)
=2x+14+3x+3
Combine Like Terms:
=2x+14+3x+3
=(2x+3x)+(14+3)
=5x+17
your answer is 5x+17
Step-by-step explanation:
$9 because 1 third of 3 third would be $3
