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katen-ka-za [31]
3 years ago
6

Geoffrey and his babysitter spent 20 minutes preparing dinner, 2 hours and 30 minutes playing board games, and half an hour maki

ng dessert. How many minutes did they spend doing these activities?
Mathematics
2 answers:
harkovskaia [24]3 years ago
6 0
200 minutes 
20 + 60 + 60 + 30 + 30 = 200
Pavel [41]3 years ago
6 0
This is very simple!!
.
Don't worry, no need to panic.
.
Just add the number of minutes up!!
.
Write the numbers that you can see are evident down.
.
20... 2 hours and 30 minutes... no more.
.
BUT WAIT!! 
.
Half an hour looks suspicious.
.
Isn't that 30 minutes?
.
Add that to our list.
.
Now, we have to convert 2 hours to minutes.
.
Arggggh!!
.
Don't worry, there's 60 minutes in an hour, so 60 x 2 is 120 minutes!!
.
Add em' up!!
.
20 + 120 + 30 + 30 is...
.
200 minutes!!
.
Or, 3 hours and 20 minutes.
.
Hope I helped!!
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Hank has 50 peso, 200 peso and 500 peso bills in his wallet. He has five less 200 bills as 50 bills, and half as many 500 bills
Varvara68 [4.7K]

For an amount of 6250 Peso, Hank have the quantities of the following denominations: 2503 bills of 50 peso, 2498 bills of 200 peso and 1249 bills of 500 peso.

<h3>How to apply systems of linear equations in real life equations</h3>

In this question we must translate the statement of the problem into mathematical expressions and then we must solve the resulting system. We need three equations that describe the quantities of 50 peso, 200 peso and 500 peso bills:

<em>y = x - 5</em>     (1)

<em>0.5 · y =</em> <em>z</em>    (2)

<em>x + y + z = 6250</em>     (3)

The solution of the system of <em>linear</em> equations is described below:

<em>x =</em> 2503, <em>y =</em> 2498, <em>z =</em> 1249

For an amount of 6250 Peso, Hank have the quantities of the following denominations: 2503 bills of 50 peso, 2498 bills of 200 peso and 1249 bills of 500 peso. \blacksquare

To learn more on systems of linear equations, we kindly invite to check this verified question: brainly.com/question/20379472

8 0
2 years ago
Suppose that in a large metropolitan area, 73% of all households have cable tv. Suppose you are interested in selecting a group
Darina [25.2K]

Answer:

P(X \leq 2)=0.000387+0.00628+0.0425=0.0491

Step-by-step explanation:

1) Previous concepts

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

2) Solution to the problem

Let X the random variable of interest, on this case we now that:

X \sim Binom(n=6, p=0.73)

The probability mass function for the Binomial distribution is given as:

P(X)=(nCx)(p)^x (1-p)^{n-x}

Where (nCx) means combinatory and it's given by this formula:

nCx=\frac{n!}{(n-x)! x!}

For what proportion of groups will at most two of the households have cable tv?

So we want to find this probability:

P(X \leq 2)=P(X=0)+P(X=1)+P(X=2)

P(X=0)=(6C0)(0.73)^0 (1-0.73)^{6-0}=0.000387

P(X=1)=(6C1)(0.73)^1 (1-0.73)^{6-1}=0.00628

P(X=2)=(6C2)(0.73)^2 (1-0.73)^{6-2}=0.0425

P(X \leq 2)=0.000387+0.00628+0.0425=0.0491

3 0
3 years ago
Can you plz help out ​
Archy [21]

Try this option:

1) q: What is the slope of the line and what does it mean in this situation?

a: the slope is 2.5 and it means '<u>ammount of the rain is 2.5 mm. per hour</u>'.

2) the slope of the line is '<u>2.5</u>'

3) this means that '<u>2.5</u>' mm. of the rain falls every '<u>1</u>' hour.

5 0
3 years ago
Is the area of the shaded rectangle 6(2−m) or 6(m−2)?<br>Explain how you know.
Rzqust [24]

Answer:

6(2-m)

Step-by-step explanation:

the m could not be times only two so the answer would have been 12-m no matter what you don't add or subtract or times the letter because unless if the number had the same letter!

Hope this helps!! if it doesnt i apalogize!! god bless!! - Natalia

6 0
3 years ago
Read 2 more answers
Evaluate the expression using the values given for x and y. What is the result?
lorasvet [3.4K]

x(y) is the same as saying "x times y". The x and y are placeholders for numbers. Think of them like boxes to place a number inside. In this case, we place an "8" in the box labeled "x"; we also place a "23" in the box labeled "y"

So, x*y = 8*23 = 184

Answer: 184

4 0
4 years ago
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