Answer:
x=20
Step-by-step explanation:
Since this is a right triangle, we can use the Pythagorean theorem
a^2 + b^2 = c^2
21 ^2 + x^2 = 29^2
441+x^2 =841
Subtract 441 from each side
x^2 = 841-441
x^2 = 400
Take the square root of each side
sqrt(x^2) = sqrt(400)
x = 20
To solve this, create an equation that follows 45% of a value is 18. This would look like x*.45=18. Now, solve for x, x*.45=18, divide by .45, x=18/.45=40, making your value 40. To check, plug in your value to the equation 40*.45=18 and see if it stays true.
2/8 and 4/16 are equivalent to 1/4
Answer:
Step-by-step explanation:Factor the left side of the equation.
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(
y
−
1
)
(
y
2
+
9
)
=
0
Set
y
−
1
equal to
0
and solve for
y
.
Tap for more steps...
y
=
1
Set
y
2
+
9
equal to
0
and solve for
y
.
Tap for more steps...
y
=
3
i
,
−
3
i
The solution is the result of
y
−
1
=
0
and
y
2
+
9
=
0
.
y
=
1
,
3
i
,
−
3
i
