Question

please answer me please​

Answer 1

Step-by-step explanation:

1. 180 degree
2. $1 - \frac{ - 2}{3} = 1 + \frac{2}{3} = \frac{5}{3}$
3. 15 answer180degree
4. 16. -5/2
5. 10000000000+3000000000+500000000+30000000

${a}^{3} \times {b}^{3}$

1. 20.
2. $\frac{ - 28}{ - 42} = \frac{14}{21} = \frac{2}{3}$
3. that's is your answers

Answer 2

$\huge\bf{Answer :}$

Ques-11 :-

Answer = 180° ✔️

• The two angles forming a linear pair have the angle sum of 180°.
• These angles are also known as adjacent angles in the linear pair.

Ques-12 :-

Answer = 0.31 ✔️

Explanation :

Here, percent means "per hundred"

∴ we'll divide the 31 by 100 in order to get the desired percentage.

⇒ 31/100 = 0.31

Ques-13 :-

Answer = 5/3 ✔️

Explanation :

Here, the two negative signs would be changed into positive sign because both the signs are getting multiplied by each other.

∴ 1 - ( - 2/3 ) = 1 + 2 / 3

⇒ 1 + 2 / 3

Now, we'll take the LCM of 1 and 3 i.e 3

⇒ 3/3+2/3 = (3+2)/3 = 5/3

Ques-14 :-

Answer = 180° ✔️

Here, we can find the supplement of any angle by subtracting that angle with 180°.

Here, the given angle is 0°

∴ 180° - 0° = 180°

Ques-15 :-

Answer = 180° ✔️

• The sum of angles in a triangle is 180°.
• This property of the triangle is known as Angle sum property of the triangle.

Quest-16 :-

Answer = -5/2 ✔️

• We can get a reciprocal of a particular rational number, just by interchanging the place of numerator and denominator of that rational number.
• But the place of negative sign is not changed and it Will remain fixed in the numerator.

Ques-17 :-

Answer = 1.353×10¹⁰ ✔️

Explanation :

We can find the standard form of a number by the following steps :

• First, write the non-zero number i.e. 1353
• Now count the digits after 1353.
• Here, there are 7 digits placed after 1353.
• Now, put a decimal point after 1 in 1353 and after the point, place 10 numbers such that is 353×10¹⁰.
• Hence, our required standard form is 1.353×10¹⁰.

Ques-18 :-

Answer = a³b⁴ ✔️

Explanation :

• We know that, 2×2 = 4 = 2². Therefore, a × a = a² and b × b = b². Similarly, a × a × a = a³ and b × b × b × b = b⁴.
• Therefore, a³×b⁴= a³b⁴.

Ques-19 :-

Answer = 10:1 ✔️

Explanation :

• Here, we'll first convert Rs.5 into paise.
• For converting rupees into paise, we multiply the rupees into 100.
• Therefore, Rs.5 = 5×100 = 500 paise.

Now, we'll simple divide 500 paise by 50 paise to get the ratio.

⇒ 500/50 = 10/1 = 10:1

Ques-20 :-

Anwer = 2/3 ✔️

Explanation :

• First, we'll cancel the negative sign placed on the numerator and denominator.
• Now, we'll cancel both the numerator and denominator by dividing them by a common factor.
• Here, common factor is 14, so we'll divide the numerator and denominator by 14.

∴ 28/42 = 2/3