Answer:
Step-by-step explanation:
a = 27
n = 20
d = -5
L20 = 27 + (n - 1)*d
L20 = 27 + (20-1)*_5
L20 = 27 + 19*-5
L20 = -68
Sum = (a + L)*n/2
Sum = (27 - 68)*20/2
Sum = -41 * 10
Sum = - 410
Answer:
9x -2
Step-by-step explanation:
6x + 4 - 3x - 2
6x + 3x +4 - 2
9x -2
Answer:
6:2:1
Step-by-step explanation:
360÷60=6
120÷60=2
60÷60=1
Answer:
4 is the length
Step-by-step explanation:
14 and 4
14 x 14 + 4 x 4 = 212
14 + 4 = 18
Answer:
32.6
Step-by-step explanation:
when you plug in for s and r you will get 66-33.4 since 5.5 multiped by 12 is 66 and 8.35 multiplied by 4 is 33.4 .
then you subtract them and that's how you'll get your answer