Answer:
x = -10 and x = 9
Step-by-step explanation:
-x = 10 <- divide -1 on both sides: -1x / -1 and 10 / -1.. you get -10 = x
repeat with -x = -9 <- divide -1 on both sides: -1x / -1 and -9 / -1.. you get 9 = x
Numbers are 4 and 8
<u>Step-by-step explanation:</u>
Step 1:
Let the numbers be x and y. Given that their sum is 12 and difference is 4. Form equations for this data.
⇒ x + y = 12 ------ (1)
⇒ x - y = 4 -------- (2)
Subtract eq (2) from (1)
⇒ 2x = 8
⇒ x = 4
Step 2:
Find y.
⇒ y = 12 - x = 12 - 4 = 8
Answer: 12
Step-by-step explanation: Since 11 is ruled out, answer is 12 people
Answer:
s and t are perpendicular
Step-by-step explanation:
they intersect at a 90 degree angle, which is marked by the little square at the point where they intersect.