If you would like to solve the system of equations, you can do this using the following steps:
y = - 3
y = x - 0.8
_________
y = y
- 3 = x - 0.8
x = - 3 + 0.8
x = - 2.2
(x, y) = (- 2.2, - 3)
The correct result would be <span>(- 2.2, - 3).</span>
A long session lasts 50 minutes.
Step-by-step explanation:
Let,
Duration of long session = x
Duration of short session = y
According to given statement;
3x+4y=270 Eqn 1
each long session lasts twenty minutes longer than the short session.
x = y + 20 Eqn 2
Putting value of x from Eqn 2 in Eqn 1
Dividing both sides by 7
Putting y = 30 in Eqn 2
A long session lasts 50 minutes.
Keywords: linear equation, substitution method
Learn more about substitution method at:
#LearnwithBrainly
Answer:
27
Step-by-step explanation:
f(x) is the same as y
if x=5 then you will multiply 5 by 4 which will give you 20
20 + 7 = 27
Solution:
Number of alloys made using 2.3gm copper = 1
Number of alloys made using 1gm copper = 1/2.3
Number of alloys made using 9.2 copper = 9.2/3.2
=4
Explanation:
Hence, 4 alloys of similar kind can be made using 9.2gm copper
Answer:
y=62.0
Step-by-step explanation:
Cosine rule Formula : √a²+b²-2abcos(angle)
=61.98387