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lilavasa [31]
3 years ago
6

Please help me asap.Explain by showing please.

Mathematics
1 answer:
quester [9]3 years ago
3 0
I'm sorry I would help but I'm going to have to say b sorry for not being able to show
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Find the difference between the lengths of the longest and shortest sides of a rectangle if its area is 924 square milimetres an
BigorU [14]

Length =l

Height = h

Area function = l * h = 924

Perimeter function = 2i + 2h = 122

Divide by 2

I + h = 61.

Plug in I or h for the other variable

I * (61 - I) = 924

61i - i^2 = 924

Factor the function

(-I + 28)(I - 33) = 0

l = 33 as l cannot be negative

61 - 33 = 28

h = 28

Difference between h and l is 33-28=5

6 0
2 years ago
Jonathan’s class has 30 boys. Of the students in his class, 60% are girls. How many girls are in Jonathan’s class?
raketka [301]

Answer:

45 girls

Step-by-step explanation:

  • Remark
  • There are only 2 choices for gender. So if the class is 60% girls, the there must be 100 - 60 = 40% for the boys.
  • But we are told that the boys are 30 in number.
  • Let x = the total number of students.

Solution

  • 40/100 * x = 30              Change the % to a decimal
  • 0.4 x = 30                       Divide both sides by 0.4
  • 0.4 x / 0.4 = 30 / 0.4      Do the division
  • x = 30/0.4
  • x = 75 students in total

Formula

Total of Boys and Girls = Number of boys + number of girls.

Givens

  • Total = 75
  • Number of boys = 30

Solution II

  • 75 = x + 30                 Subtract 30 from each side
  • 75 - 30 = x +30 - 30
  • 45 = x
  • There are 45 girls in the class.
5 0
3 years ago
9000 dollars is placed in an account with an annual interest rate of 7.75%. How much will be in the account after 18 years, to t
NNADVOKAT [17]

In one year, $ 9,000 with a profit of 7.75%, is $ 697.5

697.5 × 18 = 12555

After 18 years old, it is $ 15,222

7 0
3 years ago
Read 2 more answers
What is mass ? is anyone from india ?​
kaheart [24]

Answer:Mass is a measure of the amount of matter in an object. I'm not from India, I'm from Maldives!

I'm not trying to be rude with u but

what's wrong with u

I clearly said avyaya

U didn't have to answer!

No need to poke your nose into others business

Mind it

7 0
3 years ago
Read 2 more answers
What should you do first in solving the quadratic equation?<br> x² + 18x + 81 = 25
N76 [4]

Answer:

x= -4,-14

Step-by-step explanation:

Try first to solve the equation by factoring. Be sure that your equation is in standard form before you start your factoring attempt.

3 0
3 years ago
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