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3 years ago

There are 20 sweets in a packet. The sweets are either red or blue. 12 of the sweets are red.

Mathematics

2 answers:

Dmitrij [34]3 years ago

6 0

A)3/5
I'm not sure about the other, not too good with ratios.

ivanzaharov [21]3 years ago

6 0

A. 3/5 are red sweets

B. 2/5 are blue sweets

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The graph of the function f is shown. f(5) =<br> A)<br> -5<br> B)<br> -1<br> C)<br> 0<br> D)<br> 5

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The anwers is B hope it helps please give me Brainly

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3 years ago

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Which decimal number is equal to 3 1/8 ?

Ostrovityanka [42]

The decimal number that is equal to 3 1/8 is 3.125.

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4 years ago

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<img src="https://tex.z-dn.net/?f=4y%20%2B%208%20%3D%202" id="TexFormula1" title="4y + 8 = 2" alt="4y + 8 = 2" align="absmiddle"

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$4y+8=2\qquad|\text{subtract 8 from both sides}\\\\4y=-6\qquad|\text{divide both sides by 4}\\\\y=-\dfrac{6}{4}\\\\\boxed{y=-\dfrac{3}{2}\to y=-1.5}$

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4 years ago

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You want to find out whether caffeine mitigates the effect of alcohol on reaction time. To study this, you administer to your su

Ymorist [56]

Answer:

First Question

lower limit of 9 mph $j = 8.5 \ mph$

upper limit of 9 mph $q = 9.5 \ mph$

Second Question

lower limit of 120 pounds is $i = 119.9 \ pounds$

upper limit of 120 pounds is $l = 120.1 \ pounds$

Third Question

lower limit of 187 pounds is $a = 186.75 \ pounds$

upper limit of 187 pounds is $b = 187.25 \ pounds$

Step-by-step explanation:

From the question we are told that

The amount of beer administered is three 12-ounce beers

The amount of coffee administered is two cups of coffee

The speed limit is 60-mph

The smallest unit of scale is 1 mph

The first subject scores 9 mph

Generally given that the smallest unit of scale is 1 mph then the deviation of 9 mph will be by $\frac{1}{2} \ mph$

Hence the lower limit of 9 mph is

$j = 9 - 0.5$

$j = 8.5 \ mph$

And the upper limit of 9 mph is

$q = 9 + 0.5$

$q = 9.5 \ mph$

Generally given that the measuring weight on a scale that is accurate to the nearest 0.2 pound then 120 pounds will deviate by $\frac{1}{0.2} \ pounds$

Hence the lower limit of 120 pounds is

$i = 120 - 0.1$

$i = 119.9 \ pounds$

And the upper limit of 120 pounds is

$l = 120 + 0.1$

$l = 120.1 \ pounds$

Generally given that the measuring weight on a scale that is accurate to the nearest 0.5 pound then 187 pounds will deviate by $\frac{1}{0.5} \ pounds = 0.25 \ pounds$

Hence the lower limit of 120 pounds is

$a = 187 - 0.25$

$a = 186.75 \ pounds$

And the upper limit of 120 pounds is

$b = 187 + 0.25$

$b = 187.25 \ pounds$

5 0

4 years ago

A plane flies due East from A(lat.53°N, long. 25°E) to a point B(lat. 53.°N, Ilong. 85°E) at an average speed of 400 km/h. The p

aniked [119]

Answer:

(a) 4035 km

(b) 10 h

Step-by-step explanation:

For the purpose here, we assume the Earth is a sphere, the radius to the path of the airplane is 6400 km, and pi = 22/7. We further assume that each path is part of a circle of appropriate radius.

<h3>(a) Distance A-B</h3>

The distance from A to B will be the length of the latitude line between 25°E and 85°E, a change in longitude of 60°. The radius of the circular path along latitude line 53° is ...

(6400 km)×cos(53°) ≈ 3851.616 km

The length of the path from A to B is given by ...

s = rθ . . . . where θ is in radians

s = (3851.616 km)(π/3) = (3851.616 km)(22/(7·3)) ≈ 4035 km

The distance from A to B is about 4035 km.

The time is the ratio of distance to speed:

t = d/r = (4035 km)/(400 km/h) = 10 h

The time taken to reach point B is 10 hours.

<h3>(c) Latitude of point C</h3>

Using the above relation for arc length, we can find the angle associated with an arc length of 2000 km.

θ = s/r = (2000 km)/(6400 km) = 5/16 . . . . radians

The conversion to angle is ...

degrees = radians × 180/π

degrees = (5/16)(180/(22/7)) = 5·180·7/(16·22) = 17 79/88 ≈ 18

Point C is 18° closer to the equator than latitude 53°, at latitude 35°.

The latitude of C is 35°.

<em>Additional comment</em>

Using a different approximation for pi will change the AB distance by a few km.

6 0

2 years ago