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navik [9.2K]
3 years ago
10

On a math test, 30 students earned a B. This number is exactly 40% of the total number of students in the class. How many studen

ts are in the class
Mathematics
1 answer:
Tju [1.3M]3 years ago
4 0
There are 75 students in the class. 30*100/40=75
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Simplify the rational expression:<br> 5y+5/2 ÷ 25y-20/40y²-32y
NNADVOKAT [17]

Step-by-step explanation:

Your problem → 5y+5/2 / 25y-20/40y^2-32y

5y+5/2÷25y-20/40y^2-32y

=5⋅y+5/2÷25×y-20/40×y^2-32×y

=5y+5/2÷25×y-20/40×y^2-32y

=5y+5/2×1/25×y-20/40×y^2-32y

=5y+y/10-20/40×y^2-32y

=5y+y/10-y^2/2-32y

=5y×10+y-y^2×5-32y×10 ÷ 10

=50y+y-5y2-320y ÷ 10

= -269y-5y^2 / 10

4 0
3 years ago
Classify the following into monomials, binomial and trinomials.
Degger [83]
  • A monomial is an expression containing a single term.
  • A binomial is an expression having two terms.
  • A trinomial is an expression having three terms.

  1. Here -6 is a monomial having a single term -6.
  2. -5 + x is a binomial containing two terms -5 and x.
  3. 32x - y is a binomial having two terms 32x and -y.
  4. 6x² + 5x - 3 is a trinomial having three terms 6x², 5x and -3.
  5. z² +2 is a binomial having two terms z² and 2.

<u>Answers</u>

  1. <u>monomial</u>
  2. <u>binomial</u>
  3. <u>binomial</u>
  4. <u>trinomial</u>
  5. <u>binomial</u>

Hope you could understand.

If you have any query, feel free to ask.

5 0
2 years ago
4.Which is the best buy in the following cases. a) 4pens for Rs 56 or 6pens for Rs 90 give full step of answer​
Greeley [361]

Answer:

4 pens

Step-by-step explanation:

better value

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3 years ago
Maya used a total of 2 1/6 gallons of gas while driving her car. Each hour she was driving, she used 7/8 gallons of gas. What wa
kvv77 [185]

Ans

2:47 mins

Step-by-step explanation:

2 1/6 ÷7/8 = 2 10/21

2 10/12 to decimal 2.47

4 0
2 years ago
A box has the following measurements:
GalinKa [24]

Answer:

Question one answer.

length 8cm. with 4.2cm. height 3.1cm

V= L×W×H

= 8cm × 4.2cm × 3.1cm

= 104.16cm³)

Question 2 answer

there will be 2 decimal after decimal point because in with and height, at total there is two decimal, so it will be 2decimal for ever.

if my answer helps you,

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3 years ago
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