9/4y-2=25
9/4y-2+2=27+2
9/4y=27
9/4y*4y=27*4y
9=4y*27,
1/3=4y, (9/27 simpltfies to 1/3, 1/3 divided by 4: 1/3*1/4=1/12)
1/12=y
Answer:y=1/12
Usando proporciones, se encuentra que 400 africanos han participado.
En total, hay x participantes.
de los corredores son europeos, o sea:
Los americanos son la dècime parte de los europeos, o sea:
Los africanos son la quinta parte de los americanos, o sea:
En la carrera han inscritos 24 000 participantes, o sea, 
. Por eso, la cantidad de africanos es:
Para obtener más información sobre las proporciones, puedes visitar a brainly.com/question/24615636
Answer:8^4 + 14^36 is the perimeter because they are for sides in a rectangle so you have to double the amount.
Answer:7h-2
Step-by-step explanation:
take away 2 indicates -2
7 times h indicates 7h
then you have a few ways to write this out either: -2+7h or 7h-2
both are correct!
Answer:
- incorrect
- correct
- incorrect
Step-by-step explanation:
A + B = (-4x^2 +2x -5) +(3x^2 +6) = x^2(-4+3) +x(2) +(-5+6) = -x^2 +2x +1
The given sum is Incorrect.
__
A - C = (-4x^2 +2x -5) -(-5x -4) = -4x^2 +x(2+5) +(-5+4) = -4x^2 +7x -1
The given difference is Correct.
__
B + C = (3x^2 +6) +(-5x -4) = 3x^2 -6x +2
The given sum is Incorrect.
