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3 years ago

There are 20 rows of seats on the concert hall:25 seats are in the 1st row

Mathematics

1 answer:

lapo4ka [179]3 years ago

7 0

Answer:

20x25=500 10x25+10×25=500

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What is 27/64 in simplest form

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4 years ago

Look at the figure. If m∠JKM = 48, find m∠J.

vladimir2022 [97]

Answer:

Step-by-step explanation:

The measure of angle K is 48, the measure of angle m is 90. From there you have 138 degrees. A triangle is 180 degrees. You subtract 138 from 180.

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3 years ago

A present is shaped like a

matrenka [14]

Answer: Yes

Step-by-step explanation:

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3 years ago

If the class mark and class size of the class

Gemiola [76]

Answer:

The class interval is: 20-30

Step-by-step explanation:

Let l be the lower class limit and u be the upper class limit.

Then according to given statement that class mark is 25

$\frac{l+u}{2} = 25\\l+u = 50\ \ \ Eqn\ 1$

And

Class size is 10

So, the second equation will be:

$u-l = 10\ \ \ \ Eqn\ 2$

Adding equation 1 and 2

$l+u+u-l = 50+10\\2u = 60\\\frac{2u}{2} = \frac{60}{2}\\u = 30$

Now putting u =30 in equation 1

$l+u = 50\\l+30 = 50\\l = 50-30\\l = 20$

A class interval is written in the form that lower limit comes first and upper limit comes second.

So,

20-30

Hence,

The class interval is: 20-30

7 0

3 years ago

Item 9 Forty-five basketball players participate in a tournament. Write and solve an equation to find the number x of 3-person t

postnew [5]

Answer: See explanation

Step-by-step explanation:

Since forty-five basketball players participated in the tournament and a 3-person team wants to be formed, the equation to find the number x of 3-person teams that they can form will be:

3x = 45

x = 45/3

x = 15

Therefore, 15 3-person team can be formed.

6 0

3 years ago