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KengaRu [80]
3 years ago
13

Is 15/28 equivalent to 25/45

Mathematics
1 answer:
Lana71 [14]3 years ago
7 0
No, it's not.

15/28 equals to (about) 0.54 while 25/45 is (about) 0.56.
They are close, but not equivalent.<span />
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What happens to the inequality symbol when you multiply or divide each side by a positive number?
Pani-rosa [81]
If you multiply or divide by a positive number the inequality sign DOES NOT CHANGE!

If you multiply or divide by a negative number the inequality sign flips around and becomes the opposite.
3 0
2 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:

<u><em>Step(i)</em></u>:-

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}

<u><em>Step(ii):</em></u>-

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

8 0
3 years ago
Given that B is the midpoint of segment AC, find the unknown values.
shusha [124]
Hi! for x, you need to do 2x-8 = x+17 and solve, because since b is the midpoint, ab and bc would be congruent.

2x-8 = x+17
1x-8 = 17
1x = 25
x = 25

in order to find ab, you plug in the x into the expression.

ab = 2x-8
ab = 2(25)-8
ab = 42

do the same for bc:

bc = x + 17
bc = 25 + 17
bc = 42

and for ac, combine the two expressions and plug in the value for x.

ac = ab + bc
ac = 2x-8 + x+17
ac = 2(25)-8 + 25+17
ac = 84

i hope this helped! have a good day/night :)

5 0
3 years ago
Write the word sentence as an equation. Then solve the equation.
Zarrin [17]

Answer:

c = -7

Step-by-step explanation:

c + 10 = 3

subtract 10 on both sides of the equal sign

c = -7

8 0
3 years ago
Sonji plots -9 on a number line to represent the depth of her sailboat underwater and labels it B. She plots positive 20
AfilCa [17]

Answer: the answer ould be b hope this helps could you brainliest plz

Step-by-step explanation:

well bc one of the number on the cordinate plane is a negative and the other is a positive than it would be answer choice b hope this helps and could you PLZ brainliest please

8 0
2 years ago
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