How (-1) mod 5 is equal to 9?

-1(mod 5)

The positive value added will be the new number .

see below

Step-by-step explanation:

when we say a≡b mod c

it means that c divides a-b

or that b is the remainder of a/c

so 9/5 the remainder is 4

so we have

9≡4 mod 5

we can substract 5 from both sides and the equation will still be true

9-5≡4-5 mod 5

4≡1 mod 5

if we do it by c divides a-b

5 divides 9-(-1)

5 divides 10

which is true so

9≡-1 mod 5

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

idk lol xd

step-by-step explanation:

ez do it yourself lazy