Answer:
the sustitucion metod is easy x=5 y=3
Step-by-step explanation:
x-3y=-4 (-2)
2x-y=7 (1)
-2x+6y=8
2x-y=7
5y=15
y=3
2x-3=7
2x=10
x=5
Answer:
Step-by-step explanation:
Given the legs of right angled triangle 4 and 5 units. we have to find the length of hypotenuse.
By Pythagoras theorem,
In right angled triangle the square of the length of the hypotenuse is equal to sum of squares of the lengths of other two sides
Hence,
<span>Find the round trip distance:
4.95 km/hr * 48 min * 1 hr/60 min = 3.96 km
1.98 km each way
d = r*t
t = d/r = 1.98/4.5
t = 0.44 hrs upstream
t = 26.4 minutes upstream</span>
Answer:
The number is x = 507.05
Step-by-step explanation:
<u><em>Step(i):-</em></u>
<em>Let 'x ' be the number</em>
<em>Given that adding 45% to a number and we get 507.5</em>
<em>Now, it can be written as</em>
<em> x + 45% = 507.5 </em>
<u><em>Step(ii):-</em></u>
The equation
x + 0.45 = 507.5
subtracting '0.45' on both sides, we get
x = 507.5 - 0.45
<em> x = 507.05 </em>
<u><em>Final answer:-</em></u>
The number is x = 507.05