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Triss [41]
3 years ago
5

Sam can wash 8 cars is in 1 hour. Shelley can wash 6 cars in 1 hour. How much time does it take them to wash 70 cars if they wor

k together?
Mathematics
1 answer:
Vlada [557]3 years ago
6 0

the answer for this question is twelve

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I need help with this question please
Shtirlitz [24]

Answer: 6 goes on 6/// 83 goes on 9///// 40goes on 6///// 64 goes on8///and the 7.5 will go between 7 and 8

Step-by-step explanation:

go onto a calculator and type in the number and decide it by the square root

3 0
3 years ago
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Which of the following line passes through point (-4,5) and is parallel to the line segment whose endpoints are at (-2,-3) and (
NNADVOKAT [17]

For this case we have that by definition, the equation of a line of the slope-intersection form is given by:

y = mx + b

Where:

m: It's the slope

b: It is the cut-off point with the y axis

By definition, if two lines are parallel then their slopes are equal.

Then, the requested line will have a slope equal to:

m = \frac {y_ {2} -y_ {1}} {x_ {2} -x_ {1}} = \frac {5 - (- 3)} {2 - (- 2)} = \frac {5 +3} {2 + 2} = \frac {8} {4} = 2

Thus, the line is of the form:

y = 2x + b

We substitute point (-4,5)and find "b":

5 = 2 (-4) + b\\5 = -8 + b\\5 + 8 = b\\b = 13

Finally, the equation is:

y = 2x + 13

Answer:

y = 2x + 13

8 0
3 years ago
Which statement describes a limitation of the kinetic-molecular theory for a gas? The theory assumes that particles do not exper
alexgriva [62]
I think the correct answer from the choices listed above is option A. A  limitation of the kinetic-molecular theory for a gas is the <span>theory assumes that particles do not experience intermolecular forces.This cannot be completely true since interactions between particles is normal.</span>
5 0
3 years ago
Read 2 more answers
Three quarters of the 24 pies at the bakery are pumpkin pie. How many pies are pumpkin?
IRINA_888 [86]
Your answer is 8 pies hope this helps.
6 0
3 years ago
Read 2 more answers
find the probability exactly 3 successes in 6 trials of a binomial experiment in which the probability of success if 50%. round
Dennis_Churaev [7]

Answer:

Hence, the probability of exactly 3 successes in 6 trials of a binomial experiment round to the nearest tenth of a percent is:

31.2%

Step-by-step explanation:

The probability of getting exactly k successes in n trials is given by the probability mass function:



{\displaystyle P(k;n,p)=P(X=k)={\binom {n}{k}}p^{k}(1-p)^{n-k}}

Where p denotes the probability of success.

We are given that  the probability of success if 50%.

i.e. p=\dfrac{1}{2}

also form the question we have:

k=3 and n=6.

Hence the probability of exactly 3 successes in 6 trials is:


{\displaystyle P(3;6,\dfrac{1}{2})=P(X=3)={\binom {6}{3}}(\dfrac{1}{2})^{3}(1-\dfrac{1}{2})^{6-3}}


{\displaystyle P(3;6,\dfrac{1}{2})=P(X=3)={\binom {6}{3}}(\dfrac{1}{2})^{3}(\dfrac{1}{2})^{3}}

{\displaystyle P(3;6,\dfrac{1}{2})=P(X=3)={\binom {6}{3}}(\dfrac{1}{2})^{6}

\binom {6}{3}=20

Hence,

{\displaystyle P(3;6,\dfrac{1}{2})=P(X=3)=20\times (\dfrac{1}{2})^6=\dfrac{5}{16}

In percentage the probability will be:

\dfrac{5}{16}\times 100=31.25\%=31.2\%



8 0
3 years ago
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