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Rina8888 [55]
3 years ago
7

(3x3 - 7x2 + 12) - (3x3 + 6x2 + 10x)

Mathematics
2 answers:
Ganezh [65]3 years ago
8 0

Answer:

Step-by-step explanation:

The correct answer is -13x2 - 10x + 12. The negative is distributed inside the parentheses first to get 3x3 - 7x2 + 12 - 3x3 - 6x2 - 10x. The 3x3 and - 3x3 cancel each other. The - 7x2 and - 6x2 combine to give you -13x2. The -10x is alone. The 12 is alone.

inn [45]3 years ago
6 0
(3x³ - 7x² + 12) - (3x³ + 6x² + 10x)
(3x³ - 3x³) + (-7x² + 6x²) - 10x + 12
-x² - 10x + 12
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riadik2000 [5.3K]

Answer:

x = 9

Step-by-step explanation:

The sum of the 4 angles in a quadrilateral = 360°

Sum the given angles and equate to 360

90 + 109 + 9x - 5 + 85 = 360, that is

9x + 279 = 360 ( subtract 279 from both sides )

9x = 81 ( divide both sides by 9 )

x = 9

6 0
3 years ago
What's the steps used to solve modeling problems in the correct order​
Stolb23 [73]

Answer:

see below

Step-by-step explanation:

The first step is to read the problem

Then you need to make a plan

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Then evaluate the answer to see if it makes sense

6 0
3 years ago
What is the slope of a line that is perpendicular to the line y = x + 4? The slope of the line is ______?
serg [7]
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8 0
3 years ago
Solve the system of equations for x and y.<br> y = x + 5<br> y = 2x + 2
DIA [1.3K]
Answer (x,y) (3, -2)

Explanation:
using the
substitution method
y
=
x
−
5
→
(
1
)
y
=
−
2
x
+
4
→
(
2
)
since both equations are expressed in terms of x we

can equate them
⇒
x
−
5
=
−
2
x
+
4
add 2x to both sides
2
x
+
x
−
5
=
−
2
x
+
2
x
+
4
⇒
3
x
−
5
=
4
add 5 from both sides
3
x
+
5
−
5
=
4
+
5
⇒
3
x
=
9
divide both sides by 3
3
x
3
=
9
3
⇒
x
=
3
substitute this value in
(
1
)
y
=
3
−
5
=
−
2
As a check
substitute these values into
(
2
)
right
=
−
6
+
4
=
−
2
=
left
⇒
point of intersection
=
(
3
,
−
2
)
3 0
2 years ago
Solve xy - 3 = k solve for x
ladessa [460]

Answer:

x=(k+3)/y

Step-by-step explanation

First, we simplify by adding 3 to both sides of the equation

xy-3+3=k+3

Now it's xy=k+3

To get x we divide both sides by y

So x=(k+3)/y

3 0
3 years ago
Read 2 more answers
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