X= 2 , y= -3
You have to multiply the second equation by a negative and the you'll get, -3x-y=-3. the y's cancel out and then you combine the x's and the 5 and the 3 and then x=2 and then you pick one of the two equations and sub in the x and solve for y.
Answer:
Step-by-step explanation:
z = whole root (x^2 + 9)
Answer:
third choice : Let 2a + 1 be one odd number, and let 2b + 1 be the other odd number. (2a + 1) + (2b + 1) = 2a + 2b + 2 = 2(a + b + 1). Because 2(a + b + 1) is evenly divisible by 2, it is an even number.
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Given triangles are similar, so we setup a proportion
(140-x)/81 = x/9
solving gives x = 14
AC = 140-x = 140-14 = 126
Answer:
Step-by-step explanation:
(
−
∞
,
−
3
)
∪
(
7
,
∞
)
Solve each inequality separately, then combine them with the "or" operator, and then simplify if possible.
Let's start with the first inequality:
−
6
x
+
14
<
−
28
−
6
x
<
−
42
6
x
>
42
x
>
7
Now, we solve the second inequality:
9
x
+
15
<
−
12
9
x
<
−
27
x
<
−
3
Combining the two, we get:
x
<
−
3
or
x
>
7
This cannot be simplified, since the two solution regions do not overlap. The more formal way to write this (with interval notation) is:
(
−
∞
,
−
3
)
∪
(
7
,
∞
)
Hope this helps
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