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Math Problems
Grade 8
Describe the graph of a linear equation
4
4
4
.) Find the intercepts of each equation and greph
2
x
+
3
y
=
−
12
2 x+3 y=-12
2
x
+
3
y
=
−
12
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Graph each Linear equation the table point-plotting method
\newline
1
1
1
.)
y
=
2
x
y=2 x
y
=
2
x
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6
x
=
108
6x=108
6
x
=
108
, if
x
=
18
x=18
x
=
18
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2
x
+
3
y
=
100
,
5
y
−
25
=
5
2x+3y=100, 5y-25=5
2
x
+
3
y
=
100
,
5
y
−
25
=
5
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b) State the slope of the line perpendicular to the line whose equation is
3
x
−
2
y
=
7
3 x-2 y=7
3
x
−
2
y
=
7
.
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Find
x
x
x
.
\newline
6
x
+
5
=
14
6x+5=14
6
x
+
5
=
14
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Solve the following for `r`
\newline
8
(
1
0
3
r
)
=
12
8(10^{3r})=12
8
(
1
0
3
r
)
=
12
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The equation
8
x
−
6
y
=
1
8x-6y=1
8
x
−
6
y
=
1
what is the slope
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What is the slope of the line represented by the equation
2
x
−
5
y
=
9
2x-5y=9
2
x
−
5
y
=
9
?
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X
+
3
y
=
17
X+3y=17
X
+
3
y
=
17
and
−
x
+
2
y
=
8
-x+2y=8
−
x
+
2
y
=
8
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Pre Algebra Equations Unknown Variables: Solve the following equations using inverse operations. Show your work.
\newline
fowe lor the varabie
\newline
4
×
y
+
7
=
39
4 \times y+7=39
4
×
y
+
7
=
39
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−
8
x
+
4
y
>
3
-8x+4y > 3
−
8
x
+
4
y
>
3
\newline
6
x
−
7
y
<
−
5
6x-7y < -5
6
x
−
7
y
<
−
5
\newline
Is (
2
2
2
,
3
3
3
) a solution of the system?
\newline
Choose
1
1
1
answer:
\newline
(A) Yes
\newline
(B) No
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If
2
x
−
5
y
=
7
\mathbf{2 x}-\mathbf{5 y}=\mathbf{7}
2x
−
5y
=
7
and
−
9
x
−
2
y
=
10
-\mathbf{9 x}-\mathbf{2 y}=\mathbf{1 0}
−
9x
−
2y
=
10
are true equations, what would be the value of
−
7
x
−
7
y
-7 x-7 y
−
7
x
−
7
y
?
\newline
Answer:
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If
10
x
+
5
y
=
−
8
10 x+5 y=-8
10
x
+
5
y
=
−
8
and
−
7
x
−
10
y
=
−
9
-\mathbf{7 x}-\mathbf{1 0 y}=-9
−
7x
−
10y
=
−
9
are true equations, what would be the value of
3
x
−
5
y
\mathbf{3 x}-\mathbf{5 y}
3x
−
5y
?
\newline
Answer:
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If
−
8
x
+
4
y
=
−
6
-8 x+4 y=-6
−
8
x
+
4
y
=
−
6
is a true equation, what would be the value of
−
16
x
+
8
y
?
-\mathbf{1 6 x}+\mathbf{8 y} ?
−
16x
+
8y
?
\newline
Answer:
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If
−
10
x
+
y
=
4
-\mathbf{1 0 x}+\mathbf{y}=\mathbf{4}
−
10x
+
y
=
4
and
−
2
x
−
3
y
=
−
5
-\mathbf{2 x}-\mathbf{3 y}=-\mathbf{5}
−
2x
−
3y
=
−
5
are true equations, what would be the value of
−
8
x
+
4
y
-8 x+4 y
−
8
x
+
4
y
?
\newline
Answer:
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If
−
8
x
−
9
y
=
2
-\mathbf{8 x}-\mathbf{9 y}=\mathbf{2}
−
8x
−
9y
=
2
and
−
7
x
−
6
y
=
6
-\mathbf{7 x}-6 \mathbf{y}=6
−
7x
−
6
y
=
6
are true equations, what would be the value of
−
15
x
−
15
y
-15 x-15 y
−
15
x
−
15
y
?
\newline
Answer:
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If
−
3
x
+
5
y
=
−
8
-3 x+5 y=-8
−
3
x
+
5
y
=
−
8
is a true equation, what would be the value of
−
3
x
+
5
y
−
4
-3 x+5 y-4
−
3
x
+
5
y
−
4
?
\newline
Answer:
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If
5
x
−
y
=
−
7
5 \mathbf{x}-\mathbf{y}=-\mathbf{7}
5
x
−
y
=
−
7
and
x
−
2
y
=
2
\mathbf{x}-\mathbf{2 y}=\mathbf{2}
x
−
2y
=
2
are true equations, what would be the value of
−
4
x
−
y
-4 x-y
−
4
x
−
y
?
\newline
Answer:
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If
−
6
x
−
9
y
=
6
-6 x-9 y=6
−
6
x
−
9
y
=
6
and
−
4
x
+
y
=
−
1
-4 x+y=-1
−
4
x
+
y
=
−
1
are true equations, what would be the value of
−
10
x
−
8
y
\mathbf{- 1 0 x}-\mathbf{8 y}
−
10x
−
8y
?
\newline
Answer:
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−
8
x
+
4
y
>
3
-8x+4y > 3
−
8
x
+
4
y
>
3
\newline
6
x
−
7
y
<
−
5
6x-7y < -5
6
x
−
7
y
<
−
5
\newline
Is (
2
2
2
,
3
3
3
) a solution of the system?
\newline
Choose
1
1
1
answer:
\newline
(A) Yes
\newline
(B) No
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The value of Yong's investment account increases at a rate that is proportional at any time to the value of the account at that time.
\newline
Her account was worth
$
2000
\$ 2000
$2000
initially, and it increases by
10
%
10 \%
10%
every
4
4
4
years.
\newline
What is the value of Yong's investment account after
7
7
7
years?
\newline
Choose
1
1
1
answer:
\newline
(A)
$
2036
\$ 2036
$2036
\newline
(B)
$
2350
\$ 2350
$2350
\newline
(C)
$
2363
\$ 2363
$2363
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