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pickupchik [31]
3 years ago
7

Hey if ur good at algebra... plz help meh ty

Mathematics
2 answers:
galben [10]3 years ago
8 0

Im not for sure.. but I think it would be something like 3,9

Ad libitum [116K]3 years ago
6 0

Answer:

We rearrange the first equation into y = 8x - 42 and we substitute it in to get

-4x - 6 = 8x - 42 so 12x = 36 so

x = 3 and y = -18

hope this helps and brainliest please

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How many gallons each of 20​% alcohol and 10​% alcohol should be mixed to obtain 10gal of 11​% ​alcohol?
Scilla [17]

Answer:

20​% alcohol = 1 gal

10​% alcohol = 9 gal

Step-by-step explanation:

Let

x = 20​% alcohol

y = 10​% alcohol

x + y = 10 (1)

0.20x + 0.10y = 10*0.11

0.20x + 0.10y = 1.1 (2)

From (1)

x = 10 - y

Substitute x = 10 - y into (2)

0.20x + 0.10y = 1.1

0.20(10 - y) + 0.10y = 1.1

2 - 0.20y + 0.10y = 1.1

- 0.20y + 0.10y = 1.1 - 2

-0.10y = -0.9

y = -0.9/-0.10

y = 9 gal

substitute y = 9 into (1)

x + y = 10

x + 9 = 10

x = 10 - 9

x = 1 gal

20​% alcohol = 1 gal

10​% alcohol = 9 gal

6 0
3 years ago
The midpoint of AB is M(0, 3) If the coordinates of A are (4, - 1) , what are the coordinates of B?
Harlamova29_29 [7]

-4;4

XB=0*2-4

YB=3*2-(-1)

3 0
3 years ago
Si mi hermano gana 589 pesos diarios si ha trabajado 15 días de este mes ¿cuánto dinero ha ganado?
weeeeeb [17]

Mi hermano ha ganado un dinero <em>devengado</em> de 8835 pesos en 15 días.

En esta pregunta debemos determinar el dinero <em>devengado</em> por un período de 15 días a partir de una tasa diaria <em>constante</em>. Esa cantidad es igual al producto de la tasa diaria <em>constante</em>, en pesos por día, y el número de días <em>trabajados</em>, en días:

x = 589\,\frac{\$}{dia}\times 15\,dias

x = 8835\,\$

Mi hermano ha ganado un dinero <em>devengado</em> de 8835 pesos en 15 días.

Para aprender más sobre álgebra y aritmética, invitamos cordialmente a ver esta pregunta: brainly.com/question/953809

6 0
2 years ago
A cell phone company tests 75 cell phones and finds that 3 of them have defects. Out of 450 cell phones, how many would you expe
Hoochie [10]

Answer:

18 cellphones

Step-by-step explanation:

75 x 6= 450

3 x 6= 18

3 0
3 years ago
GEOMETRY PLEASE HELP! THANK TOU SO MUCH :)
Anna71 [15]

Answer:

11. X=76

Step-by-step explanation:

3 0
3 years ago
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