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AleksandrR [38]
3 years ago
9

there are 12 boys and 10 girls in the gym class. If 6 more boys joined , how many more girls are needed to stay at the same rati

o.
Mathematics
1 answer:
Aleonysh [2.5K]3 years ago
8 0
\frac{12}{10}= \frac{18}{x}  

cross multiply
12x=180
divide both sides by 12
x=15
if their is 10 girls, then you need 5 more to keep the ratio. 

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You volunteer to go to the store to buy breakfast for the family reunion. A dozen eggs cost $2.40.
skelet666 [1.2K]
There’s 12 eggs in a dozen. To find the unit price, just divide $2.40 by 12. This gives you a final answer of 20¢ per egg.
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4 years ago
I WILL GIVE BRAINLIEST I NEED HELP ASAP PLEASE!!!
Anit [1.1K]

Answer:

20 ft

Step-by-step explanation:

If you count how many unit’s there is on the picture then multiply by 2, you get 20

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3 years ago
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kaheart [24]

Answer:

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Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
If f(x) = x^2-1 which of the following ordered pairs would be on the graph of f(x)
Alex Ar [27]

These following ordered pairs are on the graph:

  • (0,1)
  • (5, 24)
  • (-2,3)

-------------------------------

An ordered pair (x, f(x)) will be on the graph if replacing them into the equation, we get an equivalence.

-------------------------------

The equation is:

f(x) = x^2 - 1

-------------------------------

(0,1)

Here, we test x = 0, f(x) = 1

Replacing into the equation:

1 = 0^2 - 1

1 = -1

False, so not on the graph.

-------------------------------

(0,1)

Here, we test x = 1, f(x) = 0

Replacing into the equation:

0 = 1^2 - 1

0 = 0

True, so on the graph.

-------------------------------

(3,5)

Here, we test x = 3, f(x) = 5

Replacing into the equation:

5 = 3^2 - 1

5 = 8

False, so not on the graph.

-------------------------------

(5,24)

Here, we test x = 5, f(x) = 24

Replacing into the equation:

24 = 5^2 - 1

24 = 24

True, so on the graph.

-------------------------------

(-2,3)

Here, we test x = -2, f(x) = 3

Replacing into the equation:

3 = (-2)^2 - 1

3 = 3

True, so on the graph.

-------------------------------

(-4,-17)

Here, we test x = -4, f(x) = -17

Replacing into the equation:

-17 = (-4)^2 - 1

-17 = 15

False, so not on the graph.

A similar question is given at brainly.com/question/2102317

6 0
3 years ago
Please help.
AleksAgata [21]
(4x^2+8x-2)-(2x^2-4x+3)\\\\=4x^2+8x-2-2x^2+4x-3\\\\=(4x^2-2x^2)+(8x+4x)+(-2-3)\\\\=\boxed{2x^2+12x-5}
5 0
3 years ago
Read 2 more answers
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