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3 years ago

Please help if you know, thanks!

Mathematics

1 answer:

jonny [76]3 years ago

3 0

The number of 8th grade students have dropped by 25% this year

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Simplify:<br> 2 11/12 + 5 1/2 + 3 3/8<br> Write you answer as a mixed number.

zysi [14]

Answer:

$2\frac{11}{12} +5 \frac{1}{2} + 3\frac{3}{8}$ (write them out and convert them all into mixed fractions)

$\frac{35}{12} + \frac{11}{2} + \frac{27}{8}$ (find the LCD aka least common denominator)

$\frac{70}{24} + \frac{132}{24} + \frac{81}{24}$ (add all numerators together)

$\frac{283}{24}$ (this is improper, so you need to convert back to mixed by dividing)

$11\frac{19}{24}$ (this is your answer)

3 0

2 years ago

What is the answer to " What do electrons wear on their feet"?

LekaFEV [45]

Electrons do not have FEET

4 0

3 years ago

Read 2 more answers

A game of chance involves spinning a wheel with 4 number on it. The wheel is designed so that the result of each spin Xhas the f

Kipish [7]

Distribution table :

X : ___ 1 _____ 2 _____ 3 ______ 4

P(x) __0.50 __0.25 __ 0.15 ____ 0.10

Answer:

1.85 ; 1.014 ;` 0.55 ; 3.042

Step-by-step explanation:

Probability distribution :

X : ___ 1 _____ 2 _____ 3 ______ 4

P(x) __0.50 __0.25 __ 0.15 ____ 0.10

The mean: E(x) = Σ(X * p(x))

(1*0.5) + (2*0.25) + (3*0.15) + (4 *0.10)

= 1.85

Standard deviation = sqrt(Var(x))

Var(x) = Σ(x²*p(x)) - E(x)²

Var(x) = ((1^2*0.5) + (2^2*0.25) + (3^2*0.15) + (4^2 *0.10)) - 1.85^2

= 4.45 - 3.4225

= 1.0275

Standard deviation = sqrt(1.0275)

Standard deviation = 1.0136567

Standard deviation(X) = 1.014

3.)

Cost of spin = $5

Amount, y to be received = 3 times the number that appears

y = 3x - cost of playing

y = 3x - 5

E(y) = E(3x - 5)

E(y) = E(3x) - 5

Recall :E(x) = 1.85

E(y) = 3(1.85) - 5

E(y) = 0.55

Standard deviation :Sd(y) =

Sd(3x - 5)

3(1.014)

= 3.042

5 0

2 years ago

Belmont Stakes.

kotykmax [81]

It would take 6.5 hours

7 0

2 years ago

Read 2 more answers

Let y = 2t + 5 be a linear function representing the distance from home for an ant t minutes after starting out from a location

scoray [572]

Answer:

The correct option is B.

Step-by-step explanation:

The given equation is

$y=2t+5$ ..... (1)

Where, y is distance from home for an ant t minutes after starting out from a location near its home.

The slope intercept form of a line is

$y=mx+b$ .... (2)

Where, m is slope and b is y-intercept or initial value.

On comparing (1) and (2), we get

$m=2, b=5$

Here, 5 represent the initial distance of ant from its home.

It means the ant is moving at 2 feet per minute and the ant started out 5 feet from its home.

Therefore option B is correct.

7 0

2 years ago

Read 2 more answers