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sdas [7]
3 years ago
5

. If y varies directly with x when y = -4 and x = 10, determine y when x = 2. Write and equation for the direct variation and de

termine the value.
Mathematics
1 answer:
taurus [48]3 years ago
7 0

Answer:

y = - 0.8

Step-by-step explanation:

Given that y varies directly with x then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition when y = - 4, x = 10, then

- 4 = 10k ( divide both sides by 10 )

- 0.4 = k

y = - 0.4x ← equation of variation

When x = 2 , then

y = - 0.4 × 2 = - 0.8

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What is the Value of f(6) if f(x)=2x-11
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The answers are
f
o
g
(
x
)
=
−
2
x
+
23
and
g
o
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(
x
)
=
−
2
x
+
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Explanation:
f
(
x
)
=
−
2
x
+
11

g
(
x
)
=
x
−
6

f
o
g
(
x
)
=
f
(
g
(
x
)
)
=
f
(
x
−
6
)
=
−
2
(
x
−
6
)
+
11

=
−
2
x
+
12
+
11
=
−
2
x
+
23

g
o
f
(
x
)
=
g
(
f
(
x
)
)
=
g
(
−
2
x
+
11
)
=
−
2
x
+
11
−
6

=
−
2
x
+
5

I think that the equations speak by themselves.
Of course,
f
o
g
(
x
)
≠
g
o
f
(
x
)
3 0
3 years ago
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PLEASE HELP, ITS DUE VERY SOON
VLD [36.1K]

Answer:

30

Step-by-step explanation:

90+2x+x=180

3x=90

x=30

5 0
2 years ago
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