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3 years ago

PLZZZ DO THIS FOR ME ILL MARK YOU BRAINLY AND 40 POINTS

Mathematics

1 answer:

Flura [38]3 years ago

8 0

Answer:

I don't know

Step-by-step explanation:

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Kevin and his children went into a restaurant and he bought $31.50 worth of hotdogs and drinks. Each hotdog costs $4.50 and each

stich3 [128]

Answer:

He bought 6 hotdogs and 2 drinks

Step-by-step explanation:

System of Equations

Kevin and his children went into a restaurant and bought $31.50 worth of hotdogs and drinks. Each hotdog costs $4.50 and each drink costs $2.25.

To solve the system of equations, we'll call the variables:

x = number of hotdogs

y = number of drinks

The first condition yields the equation:

4.50x + 2.25y = 31.50 [1]

It's also known he bought 3 times as many hotdogs as drinks, thus:

x = 3y [2}

Substituting [2] in [1]:

4.50(3y) + 2.25y = 31.50

Operating:

13.5y + 2.25y = 31.50

15.75y = 31.50

y = 31.50/15.75

y = 2

And

x = 3*2 = 6

He bought 6 hotdogs and 2 drinks

5 0

3 years ago

Rewrite the expression without parentheses. 15m − ( 3 + 5m )

marin [14]

Answer:

Rewritten: 15m -3 - 5m

Step-by-step explanation:

15m − ( 3 + 5m )

15m -3 - 5m

10m - 3

8 0

3 years ago

HELP IM STUCK PLEASE

morpeh [17]

Answer:

C and F

Step-by-step explanation:

3 0

3 years ago

The number of errors in a textbook follow a poisson distribution with a mean of 0.01 errors per page. what is the probability th

neonofarm [45]

Mean number of errors in each page = 0.01
Mean number of errors in 100 pages = 0.01*100=1

It is possible to use the cumulative distribution function (CMF), but the math is a little more complex, involving the gamma-function. Tables and software are available for that purpose.

Thus it is easier to evaluate with a calculator for the individual cases of k=0,1,2 and 3.

The Poisson distribution has a PMF (probability mass function)

$P(k):=\frac{\lambda^ke^{-\lambda}}{k!}$
with λ = 1
=>
$P(0):=\frac{1^0e^{-1}}{0!}=0.3678794$
$P(1):=\frac{1^1e^{-1}}{1!}=0.3678794$
$P(2):=\frac{1^2e^{-1}}{2!}=0.1839397$
$P(3):=\frac{1^3e^{-1}}{3!}=0.0613132$
=>
$P(k$
or
P(k<=3)=0.9810 (to four decimal places)

3 0

3 years ago

Solve. X = -7 4x - 4y = 12 (x,y)

Fynjy0 [20]

Answer:

(-7, -10)

$x=-7\\y=-10$