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Monica [59]
3 years ago
8

Determine whether the expression is a polynomial. If it is a polynomial, find the degree

Mathematics
1 answer:
ZanzabumX [31]3 years ago
5 0

Answer:

This expression is a polynomial. The largest exponent is 2, therefore, it is in the quadratic degree. It is a binomial because it has two parts: 3y² and -2.

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Find the value of x help me
gregori [183]

Answer: x = 35

Step-by-step explanation:

since its a 90 degree angle the equation is equal to 90

2x + 20(-20) = 90(-20)

2x/2 = 70/2

x = 35

hope this helps :))

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Subtract -4a^2-2ab+9b^2 from 7a^2-3ab+5b^2
tresset_1 [31]

{7a}^{2}  - 3ab +  {5b}^{2}  - ( -  {4a}^{2}  - 2ab +  {9b}^{2}) \\  =  {7a}^{2}  - 3ab +  {5b}^{2}   + {4a}^{2}   + 2ab + -  {9b}^{2}) \\ = {7a}^{2}   +  {4a}^{2}  -  3ab   + 2ab +   {5b}^{2}  -  {9b}^{2}) \\ =  {11a}^{2}  - ab -  {4b}^{2}

<u>Answer</u><u>:</u>

<u>{11a}^{2}  - ab -  {4b}^{2}</u>

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7 0
3 years ago
two buildings are 60 feet apart across a street. A person on top of the shorter building finds the angle of elevation of the roo
AysviL [449]

Answer:

The height of the taller building is 64\ ft

Step-by-step explanation:

see the attached figure to better understand the problem

step 1

Find the value of h1

with the angle of elevation

we know that

tan(20\°)=\frac{h1}{60}

h1=60*tan(20\°)

step 2

Find the value of h2

with the angle of depression

we know that

tan(35\°)=\frac{h2}{60}

h2=60*tan(35\°)

step 3

Find the height of the taller building

The height of the taller building is the sum of h1 plus h2

so

60*tan(20\°)+60*tan(35\°)=60*(tan(20\°)+tan(35\°))=64\ ft

7 0
4 years ago
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