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3 years ago

Someone pls help me I’ll give out brainliest please dont answer if you don’t know

Mathematics

2 answers:

VashaNatasha [74]3 years ago

7 0

Answer:

x=3

Step-by-step explanation:

Bezzdna [24]3 years ago

3 0

Answer:

x=-1

Step-by-step explanation:

4x+4=2x+2

-2x -2x

2x+4=2

-4 -4

2x=-2

x=-1

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Sixty people purchase raffle tickets. Three winning tickets are selected at random. If each prize is $3000, in how many differen

Alexus [3.1K]

Answer: $^{60}C_{3}$ ways.

Step-by-step explanation:

$^{n}C_{k}$ is the number of ways in which $k$ distinct objects are selected from a pile of $n$ distinct objects.

In our question,there are a total of $60$ people.

So, $n=60$ .

Given that three are selected at random.

So, $k=3$ .

So,the answer is $^{60}C_{3}$ ways.

5 0

2 years ago

The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the pla

forsale [732]

Answer:

Speed at Equator = 463.97 meters per second

Centripetal Acceleration at Equator = $3.37*10^{-2}$ meters per second squared

Speed at 30 degrees north of equator = 401.79 meters per second

Centripetal Acceleration at 30 degrees north of equator = $2.92*10^{-2}$ meters per second squared

Step-by-step explanation:

The formula is:

$v=\frac{2 \pi R}{T}$

Where

v is speed

R is radius

T is time

and another formula for centripetal acceleration:

$a_c=\frac{4 \pi^{2} R}{T^2}$

Now,

at equator, the radius is radius of earth (given), time in seconds is

T = 24 * 60 * 60 = 86,400

THus,

$v_E=\frac{2 \pi (6.38*10^{6}}{86,400}=463.97$

Speed at Equator = 463.97 meters per second

Centripetal Acceleration:

$a_{cE}=\frac{v_E^2}{R_E}=\frac{463.97}{6.38*10^{6}}=3.37*10^{-2}$

Centripetal Acceleration at Equator = $3.37*10^{-2}$ meters per second squared

At 30.0° north of the equator:

$R_N=R_E Cos (30)= (6.38*10^6)Cos(30)=5.53*10^6$

Now,

Speed = $v_{30N}=\frac{2 \pi (5.53*10^6)}{86,400}=401.79$

Speed at 30 degrees north of equator = 401.79 meters per second

Centripetal Acceleration:

$a_{30N}=\frac{v_E^2}{R_E}=\frac{401.79}{5.53*10^6}=2.92*10^{-2}$

Centripetal Acceleration at 30 degrees north of equator = $2.92*10^{-2}$ meters per second squared

4 0

3 years ago

What is 37.50 divided into 3

kolezko [41]

Answer:

it is 12.5 your welcome

4 0

3 years ago

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Some one please help me

Ksju [112]

Answer:

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Step-by-step explanation:

poggers

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2 years ago

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If five slices of pizza cost $5.50, how much do two cost? Ten cost? Half a slice cost?

leonid [27]

So you work out what each one cost which is $1.10 so $1.10 times two is $2.20 so two cost $2.20 ten cost $11.00 half a slice costs 55 cents

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3 years ago