4 years ago

On the first math test keiko answered

Mathematics

1 answer:

Aneli [31]4 years ago

5 0

Were are the answer chat ?

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Mr. duc asked to set up 450 chairs in a large hall. Perry puts 20 chairs in each row. He has already set up 15 rows of chairs. H

Drupady [299]

Mr. duc asked to set up 450 chairs in a large hall. Perry puts 20 chairs in each row. He has already set up 15 rows of chairs

Each row consists of 20 chairs

He already set up 15 rows

So number of chairs he already set up = chairs in each row * number of rows

20 * 15 = 300

So , he already set up 300 chairs

Total chairs to set up is 450

Remaining chairs to set up = 450 - 300 = 150

So, 150 more chairs to set up

8 0

3 years ago

4x-3= -12x+5 what is x?

yulyashka [42]

-.25 is the answer.

5 0

3 years ago

HELP ME ASAP! Will give BRAINLIEST! Please read the question THEN answer correctly! No guessing. Check ALL that apply.

sdas [7]

Answer:

-2 & 1/3

Step-by-step explanation:

When you set the two equations equal to each other, they form to parallel, vertical lines. They cross the x-axis at -2 and 1/3. Hope this helps.

3 0

4 years ago

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A student solved the equation sin2x/cosx=2, 0<=x<=pi and found the answer of pi/2 describe the students error

finlep [7]

For the given equation ⇒⇒⇒ $\frac{sin \ 2x}{cos \ x} =2$
and the given range 0 ≤ x ≤ π
We should note that the zeros of the denominator will be at
cos x = 0
∴ $x = cos^{-1} 0 = \frac{\pi}{2}$
So, the given equation is undefined at π/2
So, the students error is the division by zero.


See the attached figure which represents the graph of the given equation and we can see it is undefined at π/2

8 0

3 years ago

A rectangle is reduced by a scale factor of 1/4

vampirchik [111]

This is true. IDK if there is a question behind it.

4 0

3 years ago

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