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qwelly [4]
3 years ago
8

In an elementary school classroom, two students are given the task of cleaning the chalkboard. The first student can clean it by

himself in one minute, while the other student takes 20 seconds longer. Which of the following equations can be used to determine how many seconds it would take for both students to clean the chalkboard if they work together?
Mathematics
2 answers:
aniked [119]3 years ago
7 0

Answer:

I think it's 1/60 + 1/20 = 1/x Thats what I put. Let me know if it works :)

lutik1710 [3]3 years ago
4 0

Answer:

a minute twenty seconds

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Why might you need to use the addition or subtraction property of equality more than once after you have used the distributive p
Blizzard [7]

Answer:

If there is a variable term and a constant on each side of the equation, then you will need to use the addition or subtraction property of equality once to isolate the variable term and once to isolate the constant.

5 0
3 years ago
There are 100 centimeters in 1 meter. How many centimeters are 118 meters?​
SpyIntel [72]

Answer:

11800

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
I just need an explanation on why I was wrong and why the correct answer is correct
Alja [10]

Answer:

B 1

Step-by-step explanation:

Since the divisor is in the form of <em>x - c</em>, use what is called Synthetic Division. Remember, in this formula, -c gives you the OPPOSITE terms of what they really are, so do not forget it. Anyway, here is how it is done:

2| -2 1 5 0 4 1

↓ -4 -6 -2 -4 0

_________________

-2 -3 -1 -2 0 1→ -2x⁴ - 3x³ - x² -2x + [x - 2]⁻¹

You start by placing the <em>c</em> in the top left corner, then list all the coefficients of your dividend [-2x⁵ + x⁴ + 5x³ + 4x + 1]. You bring down the original term closest to <em>c</em> then begin your multiplication. Now depending on what symbol your result is, tells you whether the next step is to <em>subtract</em> or <em>add</em>, then you continue this process starting with multiplication all the way up until you reach the end. Now, when the last term is 0, that means you have no remainder. Finally, your quotient is one degree less than your dividend, so that -2 in your quotient can be a -2x⁴, and the -3 [x³] follows right behind it, then 1 [-x²], -2[x], and finally, [1\x - 2] (remainder is 1, so set it over your denominator, which is the divisor), giving you the other factor of -2x⁴ - 3x³ - x² -2x + [x - 2]⁻¹.

I am joyous to assist you anytime.

**(x - 2)^{-1} =  \frac{1}{x - 2}

5 0
3 years ago
a practice field is 250 ft long the game is 40% longer than the practice field of how long is the game ​
Diano4ka-milaya [45]

Answer:

350

Step-by-step explanation:

40% of 250 is 100 (10% of 250 is 25 and 25 times 4 is 100)

250+100 is 350

8 0
3 years ago
scott is riding a bike course that is 50 miles long. So far, he has ridden 6 miles of the course. What percentage of the course
ad-work [718]

Scott has ridden 12% of the course.

Step-by-step explanation:

Length of bike course = 50 miles

Distance covered = 6 miles

Distance covered in percentage = \frac{Distance\ covered}{length\ of\ bike\ course}*100

Distance covered in percentage = \frac{6}{50}*100\\

Distance covered in percentage = \frac{600}{50}

Distance covered in percentage = 12%

Scott has ridden 12% of the course.

Keywords: percentage, distance

Learn more about percentages at:

  • brainly.com/question/4105480
  • brainly.com/question/4109519

#LearnwithBrainly

4 0
3 years ago
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