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Karo-lina-s [1.5K]
3 years ago
9

If x varies directly as y and x= 18 when y =3 find x when y=7

Mathematics
1 answer:
denpristay [2]3 years ago
5 0

Answer:

42

Step-by-step explanation:

x = Ky

18 = K(3)

K = 18/3 = 6

x = 6y

x = 6(7) = 42

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3 years ago
BRAINLIEST !!!PLEASE HELP
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6 0
1 year ago
Find all real solutions of the equation. <br> x4/3 − 7x2/3 + 10 = 0
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Solve by Factoring x^(2/3)-7x^(1/3)+10=0
x
2
3
−
7
x
1
3
+
10
=
0
x
2
3
-
7
x
1
3
+
10
=
0
Rewrite
x
2
3
x
2
3
as
(
x
1
3
)
2
(
x
1
3
)
2
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(
x
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2
−
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x
1
3
+
10
=
0
(
x
1
3
)
2
-
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x
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3
+
10
=
0
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1
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u
=
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1
3
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u
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1
3
x
1
3
.
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2
−
7
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+
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=
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w = 6.7

So the answer is

<span>C. |w – 7| ≤ 0.3</span>
6 0
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