Solve -5√x=-15 hurry
a. x=9
b. x=7
c. x=-7
d. x=-9

-5 √x = -15

to isolate x you must first divide -5 to both sides. since -5 is being multiplied by √x, division (the opposite of multiplication) will cancel -5 out (in this case it will make -5 one) from the left side and bring it over to the right side.

=

= 3

to solve this you must get rid of the square root. the opposite of square root is square. you must square both sides since what you do to one side you must do to the other.

()² = 3²

a. x = 9

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step-by-step explanation:

answer: the price of one pound cabbage = $ 0.8

the point (10,8) represents that the cost of 10 pounds cabbage is $ 8

step-by-step explanation:

since, here is a proportional relation between the number of pounds of cabbage (x) and the price in dollars (y).

therefore, we can write,

⇒ y = k x

where k is the constant of proportionality.

now, point (5,4) is in the line.

thus, it will satisfies the above equation of line.

⇒ 4 = 5 k

⇒ k = 0.8

thus, the equation of the line is,

y = 0.8 x

a) for x = 1,

y = 0.8

therefore, the cost of one pound of cabbage is 0.8 dollars.

b) in the below graph (10,8) represents that the cost of 10 pounds of cabbage is 8 dollars.