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3 years ago

Help me solve please

Mathematics

1 answer:

Lisa [10]3 years ago

5 0

Answer:

degree measure of arc AB = 120°

length of arc AB = 40π/3 in.

Step-by-step explanation:

arc AB has the same measure as its central angle. So, arc AB = 120°

120 is 1/3 of 360, Therefore, the length of arc AB is 1/3 of the circumference.

Therefore, the

length of arc AB = 1/3πd = 1/3π(40) =

= 40π/3 in.

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Which would be the best method to use to solve the following equations? Explain your reasoning.

o-na [289]

A. square root property

$3x^2-192=0\\x^2-66=0\\x^2=66\\x= -\sqrt{66} or \sqrt{66}$

it has one value with x which is x^2 and it cn be easily solved without having to factorise, quadratic formula cant be used as it need ax^2+bx+c=0 format

B. factorising

$x^2-x-6=0\\x^2+2x-3x-6=0\\(x+2)(x-3)=0\\x+2=0 and x-3=0\\x= -2 \\x= 3$

i just felt like this was easier to factorise than the other 2 options left

C. Completing the square

$x^2-6x-7=0\\(x-3)^2=0\\x= -1\\x= 7$

same reason personal preference

D- Quadratic

$x^2-17x-7=0\\x=\frac{-(-17)+\sqrt{(-17)^2-4(1)(-7)} }{2(1)} \\x=\frac{-(-17)-\sqrt{(-17)^2-4(1)(-7)} }{2(1)}\\x=17.4\\x=-0.402$

the 17 kinda threw me off and i didnt wanna get on factorising or doing completing the square so quadratic formal

7 0

3 years ago

A 3-mi cab ride cost $7.90. A 9-mi cab ride cost $18.70

Sauron [17]

Answer:

first part: y=2.63x

second part: y=2.08x

Step-by-step explanation:

1) 7.90 / 3 = 2.633333 (I rounded to 2.63)

2) 18.70 / 9 = 2.07777 (I rounded to 2.08)

I hope this what you were asking

3 0

3 years ago

Simplify the following expression. 11^6/11^4 A. B. C. D.

maks197457 [2]

The solution of the given expression will be 121. The correct answer is option A.

The complete question is given below:-

Simplify the following expression. 11^6/11^4

A. 121 B. 1331 C. 11 D. 22

<h3>What is an expression?</h3>

Expression in maths is defined as the collection of the numbers variables and functions by using signs like addition, subtraction, multiplication and division.

The solution of the given expression will be given as follows:-

$\dfrac{11^6}{11^4}=11^2$

$\dfrac{11^6}{11^4}=121$

Therefore the solution of the given expression will be 121. The correct answer is option A.

To know more about expression follow

brainly.com/question/723406

#SPJ1

6 0

2 years ago

Finnegan needs average of 70 on four tests in science to make the honour roll. What is the lowest score he can receive on the fo

Lapatulllka [165]

<span><span>1. </span>Finnegan needs to get the average of 70 in 4 tests in science to be able to make it to honour roll.
Find the lowest score he received on the fourth test if his first tests are 65, 60 and 92.
let x be the missing number
=> 65 + 60 + 92 + x / 4 = 70
=> 217 + x / 4 = 70
=> 217 + x = 4 x 70
=> 217 + x = 280
=> x = 280 – 217
=> x = 63
Thus the lowest score he get is 63.</span>

5 0

3 years ago

Can somebody answer this asap I need it done in 10 minutes????

GREYUIT [131]

Answer:

Step-by-step explanation:

√9 and√16

the two numbers are 3 and 4

this means that √10 is located between 3 and 4 ( √10=3.16)

so √10 is 3.16

( unless there are different options , this is the answer)

4 0

3 years ago