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SVETLANKA909090 [29]
2 years ago
12

Kira exercises no less than 40 minutes per day. Use t to represent Kira's amount of exercise (in minutes per day).

Mathematics
1 answer:
VikaD [51]2 years ago
4 0

Kira's time exercising every day can be represented as t  ≥ 40 because she exercises for 40 minutes or more.

<h3>How can this situation be represented?</h3>

This situation can be represented with an inequality. An inequality is an expression that is used to represent variables. This type of expression uses symbols such as >, < or ≥ to represent different variable values.

<h3>What inequality is represented in this situation?</h3>

  • The expression is: t ≥ 40

The inequality represented in this situation implies that Kira exercises is equal or more time than 40 minutes every day.

Learn more about time in: brainly.com/question/26941752

#SPJ1

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how many pounds of coffee worth $10 a pound should be added to 20 pounds of coffee worth $4 a pound to get a mixture worth $5 a
Solnce55 [7]

Answer:

4

Step-by-step explanation:

1. if the mass of coffee worth $10 is 'x', then its worth is 10x, and the worth of the mixture is 5(x+20);

2. using the previous item it is possible to write the next equation:

5(x+20)=4*20+10*x; ⇒ x=4.

3. the required mass is 4 pounds.

5 0
3 years ago
9) 80 is 20% of what number?
sweet-ann [11.9K]
<h3><u>Answer:</u></h3>
  • 400 is the number.
<h3><u>Step-by-step explanation:</u></h3>

<em>There can be many ways to find the number.</em><em> I have found the number with the help of fractions and multiplication. </em><em>Below is the solution to your problem.</em>

  • 80 = 20/100
  • => 5 x 80 = 20 x 5/100
  • => 400
<h3><u>Conclusion:</u></h3>

<em>Hence, 80 is 20% of 400. </em><em>I hope my method helped you.</em>

BrainiacUser1357

8 0
2 years ago
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Step-by-step explanation:

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<span>50x - 32x^3
= 2x (25 - 16x^2)

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Please just help with the first qu ?!!!
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