Answer:
21 per min
Step-by-step explanation:
2x - 3y = -24
x+ 6y = 18
you solve the first one by the x:
2x = -24 + 3y
x = (-24+3y)/2
then you substitute what you found in the other equation and you solve by y
(-24+3y)/2 + 6y = 18 multiply everything by 2
-24 + 3y + 12y = 36
3y + 12y = 36 + 24
15y = 60
y = 60/15
y = 4
Good job! You found your y! :D
Now let's substitute the y in the first equation with 4:
2x - 3(4) = -24
2x - 12 = -24
2x = -24 + 12
2x = -12
x = -12/2
x= -6
Done!! ;) <span />
Answer:
Step-by-step explanation:
Answer:
in my panies
Step-by-step explanation:
Answer:
A) 30 and 60
Step-by-step explanation:
Complimentary angles combined = 90°.
One of the angles is twice the other. Let the measurement of the smaller one = x. Set the equation:
x + (2x) = 90°
Simplify. Combine like terms:
(x + 2x) = 90
3x = 90
Isolate the variable, x. Divide 3 from both sides:
(3x)/3 = (90)/3
x = 90/3
x = 30
Find the other measurement. The other measurement is twice the size of the first one. Multiply the number gotten by 2:
2(x) = 2(30) = 60
A) 30 and 60 is your answer.
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