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3 years ago

Please answer quickly MARKING Brainliest

Mathematics

1 answer:

Ratling [72]3 years ago

3 0

Answer:

17/19

Step-by-step explanation:

There are 190 coats sold

There are 20 large navy so that means 190-20 = 170 that are not large navy

P ( not large navy) = number that are not large navy/ total

=170/190

=17/19

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Twenty six equals eight plus v

Mumz [18]

18. You can do this in a calculator. 26 - 8 = 18. v = 18.

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3 years ago

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Hello there! Can I get someone help please ? Thanks!

natulia [17]

Since they are right triangles use Pythagorean Theorem.
a^2 + b^2 = c^2 where c is the hypotenuse.

a. 12^2 + b^2 = 13^2
144 + b^2 = 169
subtract 144 from both sides
b^2 = 25
take the square root of both sides
t = 5 This is also know as a Pythagorean Triple 5-12-13

b. a^2 + 9^2 = 12^2
a^2 + 81 = 144
subtract 81 from both sides
a^2 = 63
take the square root of both sides
a = √63
a = √(9 * 7)
a = 3√7

c. 6^2 + 9^2 = c^2
36 + 81 = c^2
117 = c^2
take the square root of each side
c = √117
c = √(9*13)
x = 3√13

4 0

3 years ago

Apple launches an ad campaign for iPhone 12. Managers want to know what is the % of social media mentions that have positive rea

Orlov [11]

Answer:

social media mentions do managers at Apple need to collect, if they want to get a margin of error of 2%

Sample size 'n' = 625

Step-by-step explanation:

Step(i):-

Given data Apple launches an ad campaign for iPhone 12

Managers want to know what is the % of social media mentions that have positive reactions to the new ad campaign

probability of positive reactions p = 1/2

Probability of negative reactions q = 1-p = 1/2

we know that $\sqrt{p(1-p}\leq \frac{1}{2}$

Step(ii):-

Given margin of error = 2 % =0.02

The margin of error is determined by

$M.E = \frac{\sqrt{p(1-p} }{\sqrt{n} }$

$0.02 = \frac{\frac{1}{2} }{\sqrt{n} }$

$\sqrt{n} =\frac{1}{2 X0.02}$

√n = 25

squaring on both sides, we get

n = 625

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2 years ago

Five more than a twice a number is less than 20. If the number is a whole number, what could the number be?

SOVA2 [1]

Answer:

Step-by-step explanation:

5 more than twice a number

(A number)=variable=x

2x+5<20

Subtract 5 from both sides

2x<15

Divide by 2

x<7.5

Any number below 7.5 (can't be 7.5 though)

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2 years ago

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I need this question done please it’s the one circled

pogonyaev

Answer:

i think 2

Step-by-step explanation:

65km ÷ x = 6 1/2km×5

65÷x = 6 1/2×5

65÷x = 13/2 ×5

65÷x = 65÷2

x = 2

so 2 is answer

4 0

2 years ago

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