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3 years ago

Someone please help me with this question, it’d be much appreciated!!

Mathematics

1 answer:

Leona [35]3 years ago

8 0

Answer:

Since after cross multiplying 60≠ 77 so, the ratios 4/7 and 11/15 are not proportion

Step-by-step explanation:

We need to find whether the ratios 4/7 and 11/15 form a proportion using cross product.

We need to identify: $\frac{4}{7}=\frac{11}{15}$

Solving using cross product:

$\frac{4}{7}=\frac{11}{15}\\4*15=11*7\\60\neq 77$

Since after cross multiplying 60≠ 77 so, the ratios 4/7 and 11/15 are not proportion

Keywords: ratio and proportion

Learn more about ratio and proportion at:

#learnwithBrainly

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Vesna [10]

Answer:

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Step-by-step explanation:

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Add the 62 onto 124

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3 years ago

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4 years ago

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4 years ago

Which is the slope of the line y=−3x+2? −3 −2 2 3

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3 years ago

Ron's recycle shop had an old paper-shredding machine. Business was good, so he bought a new paper-shredding machine. The old ma

levacccp [35]

Answer: 1 hour 20 minutes

Step-by-step explanation:

Given : The old machine could shred a truckload of paper in 4 hours.

Rate of work done by old machine = $\dfrac{1}{4}$

The new machine could shred the same truckload in 2 hours.

Rate of work done by new machine = $\dfrac{1}{2}$

Let 't' be the time taken by both of them working together , then we have the following equation:-

$\dfrac{1}{t}=\dfrac{1}{4}+\dfrac{1}{2}\\\\\Rightarrow\dfrac{1}{t}=\dfrac{1+2}{4}\\\\\Rightarrow\dfrac{1}{t}=\dfrac{3}{4}\\\\\Rightarrow t=\dfrac{4}{3}=1\dfrac{1}{3}\ \text{ hours}$

Since 1 hour = 60 minutes

Then, $\dfrac{1}{3}\ \text{ hours}=\dfrac{1}{3}\times60=20\text{ minutes}$

Hence, it will take 1 hour 20 minutes to shred the same truckload of paper if Ron runs both shredders at the same time.

8 0

4 years ago