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3 years ago

-3r+5r What is the answerrr i need helpp :((((

Mathematics

2 answers:

Ganezh [65]3 years ago

5 0

Answer:

Step-by-step explanation:

2r is the answer because:

We have to switch the -3r in to +3r and positive + positive = positive.

Then we change the add sign in to subtracting sign and we subtract:

3r-5r and it will give us:

And we keep the answer positive because our answer was a +5r so the bigger number keeps the sign the same.

adelina 88 [10]3 years ago

4 0

-3r+5r=2r
This is the right answer

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Solve the inequality. 3x + 7 > 4x + 2

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5>x because you can subtract 5 from both sides and 3x from both sides

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3 years ago

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vesna_86 [32]

Answer:

16 %

Step-by-step explanation:

(24/150) . 100 = 16

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2 years ago

Fifteen people have been exposed to a particular disease. Each one independently has a 40% chance of contracting the disease. A

valina [46]

Answer: e. .0950

Step-by-step explanation:

Let X be the number of people that can be cure from disease.

Since each people independently has a 40% chance of contracting the disease.

So , $X\sim Binomial(n=15,p=0.40)$

A hospital has the capacity to handle at most 8 cases of the disease.

Binomial distribution formula : $P(X=x)= ^nC_xp^x(1-p)^{n-x}$

Then , the probability that the hospital’s capacity will be exceeded

$P(X>8)=1-P(X\leq8)\\\\=1-0.905\ \ [\text{Using Binomial distribution table for n=15 , x=8 and p=0.4.}]$

$=0.095$

Hence, the probability that the hospital’s capacity will be exceeded is e. .0950.

Thus , the correct option is e. .0950.

8 0

3 years ago

en dos líneas paralelas cortadas por una trasversal el valor de un ángulo es 2×-14 y su suplementario mide 3×-18

ASHA 777 [7]

Responder:

x = 42,4

Explicación paso a paso:

Podemos encontrar el valor de x ya que no se nos dice qué buscar

La suma de dos ángulos suplementarios es 180 grados, por lo tanto;

2x - 14 + 3x - 18 = 180

2x + 3x - 32 = 180

5 veces = 180 + 32

5 veces = 212

x = 212/5

x = 42,4

Por tanto, el valor de x es 42,4

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2 years ago

Marta and Nicole run laps around the track they run at the same constant speed but Marta starts first when Marta has run 5 laps

Helga [31]

<h2>Hello!</h2>

The answer is:

Nicole has to run 6 laps when Marta has run 8 laps.

In order to calculate how many laps will Nicole have to run when Marta has run 8 laps, we need to use two equations.

We must consider that since both Marta's and Nicole's speed are constant all the time, Marta wil always run more laps than Nicole, meaning that there is not possibility for Nicole to run the same number of laps that Marta.

We know that they started at different time at the same constant speed, and when Marta has run 5 laps, Nicole has run 3 laps, there is a difference of 2 laps, and it will be always like that.

So, we can conclude that Marta will always be 2 laps ahead of Nicole.

$Difference=MartaLaps-NicoleLaps\\\\Difference=5Laps-3Laps=2Laps$

For Marta we have:

$MartaLaps=NicoleLaps+2Laps$

For Nicole we have:

$NicoleLaps=MartaLaps-2Laps$

Now, if we want to calculate how many laps will Nicole has to run when Marta has run 8 laps, we need to use the second equation (Nicole's equation) and substitute the number of laps (Marta's lap), so, substituting and calculating we have:

$NicoleLaps=MartaLaps-2Laps$

$NicoleLaps=8Laps-2Laps=6Laps$

Hence, we have that Nicole has to run 6 laps when Marta has run 8 laps.

Have a nice day!

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3 years ago