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Ber [7]
3 years ago
7

I need help please and thank you

Mathematics
2 answers:
Andreas93 [3]3 years ago
4 0

Positive times negative is negative, so we get

(31)(-80) = - 31 × 8 × 10 = - (240 + 8) × 10 = -2480

Answer: -2480

ozzi3 years ago
3 0

Answer:

-2480

Step-by-step explanation:

31 * -80 =-2480

Not sure how to explain this more, but I hope this helps!

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Find the solution for x if |5x – 2| = 13.
Licemer1 [7]

Answer:

x=1 if that's 15 x

Step-by-step explanation:

4 0
3 years ago
HELP ME NOW PLEASE................
Akimi4 [234]
The amount of income tax in dollars and cents is $3,895.38
6 0
3 years ago
El jefe de ventas comenta con tu padre que los 9.000 vehículos del mes pasado suponen unos buenos resultados, pero que este mes
Alja [10]

Answer:

900

Step-by-step explanation:

10% de 9000 es 900

Trabajando el 10% de 9000

Escribe 10% como 10100

Dado que, encontrar la fracción de un número es lo mismo que multiplicar la fracción por el número, tenemos

10100 de 9000 = 10100 × 9000

Por tanto, la respuesta es 900

Si está utilizando una calculadora, simplemente ingrese 10 ÷ 100 × 9000, lo que le dará 900 como respuesta.

6 0
2 years ago
Solve the system of equations using the substitution method.
Katena32 [7]
        4x+5y=7
         y=3x+9

1)      4x+5(3x+9)=7                 2)        y=3(-2)+9
                                                             y= -6 +9 
         4x+15x+45=7                               y=3                                                     
         19x+45=7
          19x= -38
             x= -2
x is -2 and y is 3
3 0
3 years ago
Math help.... Please....
garri49 [273]
First, you want to solve for the equation for this problem, would be: 
0.05N + 0.10D = 20.50 
While N = The amount of nickels, and D = The amount of dimes. 

Since N = 164, and D = 123. It would add up to 287 coins. 164 + 123 = 287. 
Now that you have the number for those two variables, solve the equation for when N = 164, and D = 123. 
0.05N + 0.10D = 20.50 
<span>0.05(164) + 0.10(123) = 20.50 
</span><span>8.2 + 12.3 = 20.50 
</span>20.50 = 20.50 
So, there is 164 nickels, and 123 dimes for your answer. 

<em>I hope this helps! </em>

<em>~ Notorious Sovereign</em>
6 0
3 years ago
Read 2 more answers
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