Answer:
x=y+4
Step-by-step explanation:
This is wt I got so far hope this helps and if doesn't help u then tell me I will b happy to help u
Done by sammy
Answer:
13 and 44
Step-by-step explanation:
let x and y be the 2 numbers with y < x , then
x - y = 31 ( add y to both sides )
x = y + 31 ( subtract 31 from both sides )
x - 31 = y → (1)
4y = x + 8 → (2)
substitute y = x - 31 into (2)
4(x - 31) = x + 8
4x - 124 = x + 8 ( subtract x from both sides )
3x - 124 = 8 ( add 124 to both sides )
3x = 132 ( divide both sides by 3 )
x = 44
substitute x = 44 into (1)
44 - 31 = y , then
y = 13
the 2 numbers are 13 and 44
Answer:
20km/hr
Step-by-step explanation:
Given that a ship sailed 30km in one and a half hours. We need to find out the rate of ship in kilometres/hour . The rate is also called Speed.
<u>Speed</u><u>:</u><u>-</u> Distance travelled per unit time is called Speed .
Here , according to Question,
<u>Distance</u> = 30 km
<u>Time </u> = 1½ hrs .
We know that ,
Subsequently ,
Substitute the respective values ,
We can write 1.5 as 3/2 , therefore ,
Simplify the RHS ,
<u>Hence</u><u> the</u><u> </u><u>Rate/</u><u>Speed </u><u>of</u><u> the</u><u> </u><u>ship </u><u>is </u><u>2</u><u>0</u><u>k</u><u>m</u><u>/</u><u>hr </u><u>.</u>
X-5
First combine like terms:
X-12-3
Then calculate difference:
X-5