Elus
assume that y varies inversely
with x. if y = 7 when x = -2, find y
when x = 7.
resources
y = [? ]

When x = 7, y = -2

Step-by-step explanation:

According to question,

y ∝ 1 / x

To remove proportionality, include a constant. Let the constant be k.

y = k × (1 / x)

Now, we know that y = 7 when x = -2

y = k × (1 / x)

7 = k × (1 / -2)

k = -14

The equation now becomes,

y = -14 × (1 / x)

Now, we need to find y when x = 7.

y = -14 × (1 / 7)

y = -2

So, when x = 7, y = -2.

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons

hello from mrbilldoesmath!

answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb