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kirza4 [7]
2 years ago
5

Urgent!! Please help!!

Mathematics
1 answer:
Anit [1.1K]2 years ago
7 0

Answer:

1100/7

Step-by-step explanation:

Because, this is half circle then if we need the length of it we will use the circumference (2 x pie x r) x 1/2

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A. Is the sum of two polynomials always a polynomial? Explain
IgorLugansk [536]

Answer:  The answers for both (a) and (b) is YES.


Step-by-step explanation: A polynomial is an algebraic expression containing   two or more algebraic terms, i.e., the sum of several terms that contain different powers of the same variable or variables with real coefficients.

For example, p(x) = 4x²+x+2 is a polynomial in variable 'x'.

(a) Yes, the sum of two polynomials is again a polynomial. For example,

if p(x) = ax² + bx + c  and  q(x) = dx² + ex + f, where, a, b, c, d, e and f are real numbers, then their sum will be

p(x) + q(x) = (a+d)x²+(b+e)x+(c+f), which is again a polynomial in 'x' with real coefficients.

(b) Yes, the difference of two polynomials is again a polynomial. For example,

p(x) - q(x) = (a-d)x²+(b-e)x+(c-f), which is again a polynomial in 'x' with real coefficients.

Thus, the answer is YES.

6 0
3 years ago
How do you write 0.74 as a fraction in simplest form?
Oksana_A [137]
0.74=74/100=37/50 in simplest form.
3 0
3 years ago
A train normally travels 240 km at a certain speed. One day, due
Marrrta [24]

\large\bf{\underline\red{Good \: Afternoon♡}}

Normal-travel DATA:

distance = 240 km

rate = x km/h

time = d/r

= 240/x hrs

_______________________

Bad weather DATA:

distance = 240 km

rate = (x-20) km/h

time = 240/(x-20) hrs

______________________

Bad time - normal time = 2 hrs

240/(x-20) - 240/x = 2

120/(x-20) - 120/x = 1

120x -120(x-20) = x(x-20)

20 = x^2 -20x

x^2 - 20x - 20 = 0

x = [20 +- sqrt(20^2 - 4*1*-20)]/2

x = [20 +- sqrt(480)]/2

x = [20 +- 4sqrt(30)]/2

x = 10 +- 2sqrt(30)

6 0
3 years ago
Answer and explain work
BabaBlast [244]

Answer:

26

Step-by-step explanation:

It is 26 because 360-105= 255 and 255 rounded to the nearest tenth is 26 (I am super sorry if i did it wrong.)

3 0
3 years ago
In the figure, find the value of x that makes a ∥ b. A. 50° B. 65° C. 75° D. 95°
Anon25 [30]

Answer:

B

Step-by-step explanation:

Because alternate interior angles are congruent in parallel lines, the angle next to the 25° in the right triangle is 85 - 25 = 60° which makes the other angle in the right triangle 180 - 90 - 60 = 30°. Since they form a straight angle, we can write x + 30 + 85 = 180 → x + 115 = 180 → x = 65°.

7 0
3 years ago
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