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Natali5045456 [20]
3 years ago
5

Explain how to write 4/80 as a decimal and as a percent.

Mathematics
1 answer:
Mekhanik [1.2K]3 years ago
3 0
All i know is you make it a decimal by dividing the numerator by the denominator
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A hobby store marks up remote-controlled cars 25%. The original
aksik [14]
Answer: $37.50

Explanation:
1. Turn 25% into a decimal by removing the “%” and placing a “0.” in front of it. (0.25)
2. Multiply the decimal (0.25) by the original price of the car (30). (0.25x30=7.5)
3. Add 7.5 to 30 to get the answer. (7.5+30=37.5=$37.50)
7 0
3 years ago
Which is the most reasonable estimate for the sum 61.92+174.8
Anna11 [10]
62+175=237
check:
61.92+174.8=236.72
pretty close so 237 is your estimation
5 0
3 years ago
Un padre para estimular a su hijo para estudiar matemáticas le dice: por cada ejercicio que resuelvas bien te daré 7 € y por cad
Naya [18.7K]

Answer:

8 ejercicios

Step-by-step explanation:

De acuerdo a la información dada, puedes plantear las siguientes ecuaciones:

x+y= 45 (1)

7x-1y= 19 (2)

x= ejercicios que resolvió bien

y= ejercicios que resolvió mal

Primero, puedes despejar x en (1):

x= 45-y (3)

Segundo, debes reemplazar (3) en (2):

7(45-y)-1y=19

315-7y-1y= 19

315-8y= 19

315-19= 8y

296= 8y

y= 296/8

y= 37

Tercero, debes reemplazar el valor de y en (3) para encontrar x:

x= 45-37

x= 8

De acuerdo a esto, la respuesta es que el hijo ha resuelto bien 8 ejercicios.

8 0
3 years ago
What is 75% of the area of a circle with a circumference of 10 units? Round the solution to the nearest square unit.
vredina [299]
C=2pir
area=pir^2

so if c=10units
10=2pir
5=pir
5/pi=r

sub for area
area=pir^2
area=pi(5/pi)^2
area=pi(25/pi^2)
area=25/pi

75% or 3/4 of that is
25/pi times 3/4=75/(4pi)
use calculator
5.9683103659460750913331411264693 square units
or rounded
6 square units
5 0
4 years ago
Read 2 more answers
Find the arc length of the partial circle
schepotkina [342]

Answer:90

Step-by-step explanation:

6 0
3 years ago
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