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Math Problems
Grade 8
Cube roots of positive perfect cubes
Solve:
7
+
4
×
5
7+4 \times \sqrt{5}
7
+
4
×
5
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Which number has an irrational square root?
\newline
Choices:
\newline
(A)
144
144
144
\newline
(B)
121
121
121
\newline
(C)
100
100
100
\newline
(D)
81
81
81
\newline
(E)
2
2
2
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solve for
x
x
x
in the equation
2
x
+
5
=
17
2x + 5 = 17
2
x
+
5
=
17
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prove that
1
2
\frac{1}{\sqrt{2}}
2
1
is irrational
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Which of the following is equal to
(
5
x
+
9
)
+
(
3
−
11
)
(5x + 9) + (3-11)
(
5
x
+
9
)
+
(
3
−
11
)
?
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Find the LCM of
18
18
18
,
72
72
72
.
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Prove the vertical angle theorem
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complete the equation of the line through
(
1
,
4
)
(1,4)
(
1
,
4
)
and
(
2
,
2
)
(2,2)
(
2
,
2
)
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Evaluate the expression
4
x
2
4 x^{2}
4
x
2
for
x
=
3
x=3
x
=
3
.
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Evaluate the expression
5
x
3
5 x^{3}
5
x
3
for
x
=
2
x=2
x
=
2
.
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What is
27
3
\sqrt[3]{27}
3
27
?
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