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adoni [48]
2 years ago
13

Which of the following equations are correct !! Choose 2 answers please !! I WILL MARK BRAINLIST

Mathematics
1 answer:
maks197457 [2]2 years ago
3 0

Answer:

B and C are correct

Step-by-step explanation:

17/4 = 4.25

4 and 1/4 = 17/4

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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
If P(A)=0.54 then what value of P(B) the event A and B are complementary event
aleksley [76]

Answer:

<em>P(B) = 0.46</em>

Step-by-step explanation:

<u>Probability</u>

The complementary event of a given event A is defined as "not A" or the event that A does not occur.

For example, if A is defined as 'getting a job', then the complement of A is 'not getting a job'.

Event A and its complementary event (call it B) must satisfy:

P(A) + P(B) = 1

If we know P(A)=0.54, then

P(B) = 1 - P(A)

P(B) = 1 - 0.54

P(B) = 0.46

7 0
2 years ago
Given the function f(x)=9x+7, find its inverse.
bagirrra123 [75]
f(x)=9x+7\\&#10;y=9x+7\\&#10;9x=y-7\\&#10;x=\dfrac{1}{9}y-\dfrac{7}{9}\\&#10;f^{-1}(x)=\dfrac{1}{9}x-\dfrac{7}{9}
3 0
2 years ago
Twelve decreased by 8 times a number is 36. Find the number.
ioda
The number is 6. The equation would be 8x - 12 = 36. You add over the 12 to the 36 to get 48. Then when you do 8x divided by 48, you get x = 6. Therefore, the number the problem is asking for is 6.
4 0
3 years ago
Write 5 pounds for $2.49 as a unit rate. Round to the nearest hundredth
Serhud [2]
I think that the answer is 5 to 2.49 or 5:2.49
7 0
2 years ago
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