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3 years ago

Which expression is a polynomial

Mathematics

1 answer:

patriot [66]3 years ago

8 0

Answer:

$4x^3-2x^2+5x-6+\frac{1}{x}$ is a polynomial

Step-by-step explanation:

a polynomial is a set of numbers with multiple terms that are not simplify able

$9x^7y^{-3} z$ is not a polynomial because its actually one term, there is no addition/subtraction of different terms.

-13 is a single number, so not a polynomial

13x^-2 is also a single number, not a polynomial

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Which equation describes the sum of the vectors plotted below?

Alex787 [66]

Answer: $A) \ 3\vec{x} -2\vec{y}$

Step-by-step explanation:

The resultant can be calculated using triangular law of vector addition as :

$\rm \vec{r}=\vec{AB} +\vec{AC}=2x+y+x-3y=\boxed{3x-2y }$

8 0

3 years ago

XY and BD are parallel lines X is a point on AB and C is a point on BD XB = XC a)complete this sentence Angle XBC=55 degree beca

solong [7]

Answer:

A is corresponding angles are equal

Step-by-step explanation:

4 0

3 years ago

8x^(2)+16x=42 completeing the square

Yuri [45]

16
x
2
+
16
x
=
42
Step 2: Subtract 42 from both sides.
16
x
2
+
16
x
−
42
=
42
−
42
16
x
2
+
16
x
−
42
=
0
For this equation: a=16, b=16, c=-42
16
x
2
+
16
x
+
−
42
=
0
Step 3: Use quadratic formula with a=16, b=16, c=-42.
x
=
−
b
±
b
2
−
4
a
c
2
a
x
=
−
(
16
)
±
(
16
)
2
−
4
(
16
)
(
−
42
)
2
(
16
)
x
=
−
16
±
2944
32
x
=
−
1
2
+
1
4
46
or
x
=
−
1
2
+
−
1
4
46
Answer:
x
=
−
1
2
+
1
4
46
or
x
=
−
1
2
+
−
1
4
46

7 0

3 years ago

Calculate the area.<br> 5 cm<br> 14cm<br> 9 cm

rjkz [21]

You have to use this equation the a=5, h=4 and b=9 and you should get the answer of 28

3 0

3 years ago

What’s 20% as a fraction, 80% as a fraction and 15% as a fraction. Also, what I mean as a fraction is like 20

Ber [7]

Answer:

see below

Step-by-step explanation:

Percent means out of 100

20% = 20/100 which can be simplified

20/100 Divide by 10 on top and bottom

=2/10 Divide by 2 on top and bottom

= 1/5

80% = 80/100 which can be simplified

80/100 Divide by 10 on top and bottom

= 8/10 Divide by 2 on top and bottom

=4/5

15% = 15/100 Which can be simplified

15/100 Divide by 5 on top and bottom

= 3/20

4 0

3 years ago