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inessss [21]
2 years ago
10

The formula for distance traveled d is d=rt, where r is the average speed of the object and t is time traveled. If an object tra

vels 75 meters in 30 seconds, what is its speed?
Mathematics
1 answer:
Setler79 [48]2 years ago
5 0

Answer:

22.5

Step-by-step explanation:

d= 75(.30)

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The sum of three numbers is 3. if the second number is subtracted from the sum of the first and third numbers, the result is 9.
Margaret [11]
Let the three numbers be x, y, and z.

If the sum of the three numbers is 3, then x+y+z=3

If subtracting the second number from the sum of the first and third numbers gives 9, then x+z-y=9

If subtracting the third number from the sum of the first and second numbers gives -5, then x+y-z=-5

This forms the system of equations:
[1] x+y+z=3
[2] x-y+z=9
[3] x+y-z=-5

First, to find y, let's take do [1]-[2]:
x+y+z=3
-x+y-z=-9
2y=-6
y=-3

Then, to find z, let's do [1]-[3]:
x+y+z=3
-x+-y+z=5
2z=8
z=4

Now that you have y and z, plug them into [1] to find x:
x+y+z=3
x-3+4=3
x=2

So the three numbers are 2,-3, and 4.


5 0
3 years ago
Explain why 4/10 and 40/100 have unlike denominators but are equivalent fractions
marishachu [46]
4/10 and 4/100 are the same because all you had to do was multiply both the numerator and denominator by 10. It is still the same amount. Hope this helps!
5 0
2 years ago
suppose that the local sales tax rate is 6.25% and youpurchased a used carr for 16,800. what is the car's total cost
Gwar [14]

Total= Car Cost + (Car Cost * Tax %)


Total= $16,800 + ($16,800 * 6.25%)

convert % to decimal form; divide % by 100


Total= $16,800 + ($16,800 * 0.0625)

multiply inside parentheses


Total= $16,800 + $1,050


Total= $17,850



ANSWER: The total cost for the used car with tax is $17,850.


Hope this helps! :)


8 0
3 years ago
Which of the following describes a correct method for solving the equation below?
ladessa [460]
1: multiple both sides by 2
Ex:-7n+10=-32
2: subtract 10 from both sides
Ex: -7n=-42
3:divide both sides by -7 to get n alone
Ex: n=6
Answer is 6 and the process is elimination!
8 0
2 years ago
A partir del 1.° de diciembre, un camión de helados visita la calle de Sara cada 3 días y la calle de Ema cada 5 días. ¿Cuáles s
777dan777 [17]

Answer:

Los primeros 2 días que el camión visita ambas calles el mismo día es el 15 y 30 de diciembre.

Step-by-step explanation:

Los múltiplos de un número son todos los posibles resultados de multiplicar ese número por todos y cada uno de los números naturales.

Es decir, los múltiplos de un número natural son los números naturales que resultan de multiplicar ese número por otros números naturales.

El conjunto de los múltiplos de un número determinado (salvo el cero) es infinito, pues existen infinitos naturales para multiplicar.

Para determinar cuáles son los primeros 2 días que el camión visita ambas calles el mismo día, debes encontrar los múltiplos de 3 y 5:

múltiplos de 3: 3; 6; 9; 12; 15; 18; 21; 24; 27; 30

múltiplos de 5: 5; 10; 15; 20; 25; 30; 35; 40; 45; 50

Podes observar que los 2 primeros números comunes o que coinciden entre los múltiplos de 3 y 5 son 15 y 30. Esto quiere decir que <u><em>los primeros 2 días que el camión visita ambas calles el mismo día es el 15 y 30 de diciembre.</em></u>

7 0
2 years ago
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