What is the value of y in the equation 6.4x + 2.8y = 44.4, when x = 3?
2 answers:
(6.4)(3)+2.8y=44.4
Simplify:
(6.4)(3)+2.8y=44.4
19.2+2.8y=44.4
2.8y+19.2=44.4
Subtract 19.2 from both sides.
2.8y+19.2−19.2=44.4−19.2
2.8y=25.2
Divide both sides by 2.8.
2.8y/2.8 = 25.2/2.8
y=9
So you've got:
6.4x + 2.8y = 44.4
You want to know the value of (y) when x=3:
6.4 * 3 + 2.8y = 44.4
(6+0.4) * 3 + 2.8y = 44.4
18 + 1.2 + 2.8y = 44.4
19.2 + 2.8y = 44.4
2.8y= 44.4 - 19.2
2.8y = 25.2
y=(25.2)/(2.8)
y=9
You might be interested in
Answer:
A = 48
B = 5
C = 54
Step-by-step explanation:
The initial investment was 3.03 because this is the value that does not change and comes before the value with the exponent "2x" is mentioned.
Y - 5 = -1/2(x-1)
hope this helps!
Answer:
use photomath
Step-by-step explanation:
it works
4(3x+4) This should hellp
