Answer:
57/40
Step-by-step explanation:
Find common denominators, note that what you do to the denominator, you must do to the numerator:

First, multiply 5/8 with 5 to both the numerator and denominator:
(5/8) x (5/5) = 25/40
Next, multiply 4/5 with 8 to both the numerator and denominator:
(4/5) x (8/8) = 32/40
Combine the numerators:
(25 + 32)/40 = (57)/40
57/40 is your answer.
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Answer:
5 amperes will produce the maximum power
Step-by-step explanation:
The power generated by an electrical circuit (in watts) as a function of its current c (in amperes) is modeled by: P(c)= -12c^2 + 120c.
To find out the maximum power we need to find the vertex
formula to find x -coordinate of vertex is 
P(c)= -12c^2 + 120c is given in the form of y=ax^2+bx+c
a= -12, b = 120

c= 5 amperes will produce the maximum power
Answer:
=77x2−332x+135
Step-by-step explanation:
My works: 20 × 24 = 480
480 ÷ 30 = 16 yards
Answer: You need 16 yards of the carpet to cover the floor that measures 20 feet by 24 feet.
15x30= 450 sq ft
450/2.25= 200
so 200 people can fit in an area of 15x30