Answer:
20
Step-by-step explanation:
The answer is 71 when simplified
In y=kx , subst. -30 for x and 3 for y. Then solve the resulting equation for k:
3 = k(-30).
Dividing both sides by -30, we get:
-3/30 = -1/10 = k
The constant of proportionality is k = -1/10.
Answer:
1.8 × 10^10
Step-by-step explanation:
(7.2 × 10 = 72)
(72) ÷ (4 × 10^-9) = 1.8 × 10^10
Let's solve your equation step-by-step.
2
x
+
3
=
5
2
x
Solve Exponent.
2
x
+
3
=
5
2
x
log
(
2
x
+
3
)
=
log
(
5
2
x
)
(Take log of both sides)
(
x
+
3
)
*
(
log
(
2
)
)
=
2
x
*
(
log
(
5
)
)
x
+
3
=
(
log
(
5
)
log
(
2
)
)
*
(
2
x
)
x
+
3
=
2.321928
*
2
x
x
+
3
=
4.643856
x
(Simplify both sides of the equation)
x
+
3
−
4.643856
x
=
4.643856
x
−
4.643856
x
(Subtract 4.643856x from both sides)
−
3.643856
x
+
3
=
0
−
3.643856
x
+
3
−
3
=
0
−
3
(Subtract 3 from both sides)
−
3.643856
x
=
−
3
−
3.643856
x
−
3.643856
=
−
3
−
3.643856
(Divide both sides by -3.643856)
x
=
0.823304