Evaries directly with the square root of c. if e=40 when c=25 find: e when c = 49 ( asap i need to hand this in tomorrow ! )

E = 56

Step-by-step explanation:

Given that E varies directly with then the equation relating them is

E = k ← k is the constant of variation

To find k use the condition E = 40 when C = 25

k = = = = 8, thus

E = 8 ← equation of variation

When C = 49, then

E = 8 × = 8 × 7 = 56

infinitely many solutions

step-by-step explanation:

we have been given the equation;

2(2x + 3) = -4 + 2(2x + 5)

we need to determine the value of x.

2(2x + 3), we expand this expression to obtain 4x + 6

similarly 2(2x + 5) will become 4x + 10

now we have;

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 10 - 4

4x + 6 = 4x + 6

the expression on the left hand side is identical to the one on the right hand side. therefore, we are looking at just a single straight line whose equation is;

y = 4x + 6

consequently, we shall have infinitely many solutions

part a

x     y

0     8

1     7.5

2     7

3     6.5

4     6

5     5.5  

for every hour i deducted .5 inches from the length of the candle

part b

it is a function because for every x value there is only one y value

part   c

for every x value there is only one y value

x       y

0       8

1       7.6

2       7.2

3       6.8

step-by-step explanation: