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pochemuha
3 years ago
9

How do you work this out

Mathematics
1 answer:
oksian1 [2.3K]3 years ago
6 0

Answer:

Below.

Step-by-step explanation:

To find the number of students in each grade you multiply the marks by the frequency density. The number of students is given by the area under the  rectangles.

So to find the number of students with grade U (< 160)  it is:

120 * 0.2 + 40*0.5

= 24 + 20

= 44.

The number for Grade E

= (200 - 160) * 0.5

= 40 * 0.5

= 20.

The others can be found in the same way.

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Please help :) Find the unknown length y in the following pair of similar triangles. y= ?
Nimfa-mama [501]

Answer:

Y should equal to 4.5

Step-by-step explanation:

Since they are similar triangles and each of the measurements on the second triangle are divided by two you would do the same for y

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3 years ago
While looking at some reports, a store manager notes that televisions that retail for $475 and up costing customers $513 once th
Mekhanik [1.2K]

The sales tax percentage of the store manager report is 7.41%

<h3>How to solve for the sales tax percentage</h3>

Customers are subject to a charge known as sales tax when they buy goods and services.

It is a pass-through tax, which means you must collect it from clients and send the money to your state or local government. the seller do not contribute sales tax.

The sales tax is first calculated by

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sales tax percentage is calculated using the formula

= (Tax amount / Price before tax) × 100%

= (38 / 513) * 100

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1 year ago
True or false 6 to the 3 power = 216
timofeeve [1]

Answer:

True

Step-by-step explanation:

6^3, or 6x6x6, is equal to 216.

---

hope it helps

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Answer the question please ​
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Step-by-step explanation:

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3 years ago
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The triangles below are similar. Triangle Y X Z. Side Y X is 6 centimeters, X Z is 7 centimeters, and Z Y is 3 centimeters. Tria
zavuch27 [327]

Answer:

  (c)  Triangle Z Y X is similar to triangle C B A

Step-by-step explanation:

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<h3>corresponding sides</h3>

The side lengths, smallest to largest, for the two triangles are ...

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And for the other triangle, ...

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The points joining the each side to the next one longer, in order for the two triangles, are ...

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The vertices corresponding to ZYX in the same order are CBA.

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