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2 years ago

Help me PLZZZZZZZ!!!!!!

Mathematics

1 answer:

eduard2 years ago

7 0

Answer:

25% decrease

Step-by-step explanation:

Take the original amount of books and subtract the new number of books

20 -15 = 5

Divide by the original amount of books

5/20 = .25

Multiply by 100%

25%

It is a decrease since the amount went down

25% decrease

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Tion 15/30

vitfil [10]

The percentage of students that passed the exam is 25.2%

The given parameters;

number of the males, = 85

number of the females, = 30

percentage of the female that passed = 40%

percentage of the male that passed, = 20%

To find:

the percentage of students that passed the exam

The number of the male students that pass the exam;

$= 0.2 \times 85 \\\\= 17$

The number of the female students that pass the exam;

$= 0.4 \times 30 \\\\= 12$

The total number of students in the school;

= 85 + 30

= 115

The total number of the students that passed the exam;

= 17 + 12

= 29

The percentage of students that passed the exam;

$= \frac{total \ number \ that \ passed }{total \ number \ of \ the \ students} \times 100\% \\\\= \frac{29}{115} \times 100\%\\\\= 25.2 \%$

Thus, the percentage of students that passed the exam is 25.2%

Learn more here: brainly.com/question/1163846

6 0

2 years ago

Identify each value that represents the shaded part.

Neko [114]

Answer:

Its 4/10

Step-by-step explanation:

You get 4/10 because there are 10 rows and 10 columns. 10*10 is 100. 40 0f them are shaded so it would be 40/100. You need to simplify by dividing by 10 and you get 4/10.

8 0

2 years ago

Read 2 more answers

23. * MULTIPLE CHOICE Which is the correct factorization of -45x^2 + 20y^2

skad [1K]

Answer:

c)-5(3x+2y)(3x-2y)

Step-by-step explanation:

1) lets find out if -45 and 20 have a GCF

-45 and 20 are both dividable by -5 so

-5(9x^2-4y^2)

1) you can see that 9 and -4 are perfect square so:

-5(3x+2y)(3x-2y)

Recheck:

1) lets use FOIL to see if this is right(if its right we will get back our original equation)

-5(9x^2-6xy+6xy-4y^2)

-5(9x^2-4y^2)

-45x^2+20y^2

hope this helps!

7 0

2 years ago

Please answer this question?

Svetlanka [38]

Answer:

Answer: (a). 290°

${ \tt{a + 40 \degree + 30\degree = 360\degree}} \\ \\ { \tt{a + 70\degree = 360\degree}} \\ \\ { \tt{a = 360\degree - 70\degree }} \\ \\ { \boxed{ \tt{ \: \: a = 290\degree}}}$

7 0

2 years ago

Read 2 more answers

Need help with school please

adoni [48]

Answer:

47+16+ x =180

x =180- 63

x= 117

4 0

2 years ago