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Pie
3 years ago
5

Simplify the expression -3x+5y-2+7x-8y+5

Mathematics
1 answer:
Natasha2012 [34]3 years ago
8 0
To simplify this expression we need, at first, to find like terms.

<span>-3x+5y-2+7x-8y</span><span>-3x+5 = (</span>-3x+7x)+ (5y-8y)  -2+5 = 4x + 3y +3

4x + 3y +3 is the answer.
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Mr. Wilson opened a bakery and a juice bar in his neighborhood. The functions below represent the profit, in dollars, earned fro
zavuch27 [327]

Answer:

The answer is given below

Step-by-step explanation:

The question is not complete, because the function for the profit is not given but I can show you how to calculate this.

Since Mr. Wilson has a bakery and a juice bar, his total profit earned in t months would be the sum of profit from the bakery with the profit from the juice bar within t months.

Let us assume that the profit from the bakery in t months is given by:

B(t) = 2t³

while the profit from the juice bar in t months is given by:

J(t) = 2.3^t-2

Therefore the total profit is given by:

P(t) = B(t) - J(t) = 2t^3+2.3^t-2

4 0
3 years ago
En un examen de admisión de 120 preguntas, cada respuesta correcta vale 2 puntos y por cada incorrecta se quita medio punto. Un
padilas [110]

Answer:

Respondió mal 64 preguntas.

Step-by-step explanation:

De acuerdo a la información proporcionada puedes plantear las siguientes ecuaciones:

x+y=120 (1)

2x-0,5y=80 (2)

x es el número de preguntas correctas

y es el numero de preguntas incorrectas

Primero debes despejar "x" en (1):

x=120-y (3)

Después, debes reemplazar (3) en (2):

2(120-y)-0,5y=80

240-2y-0,5y=80

240-80=2,5y

160=2,5y

y=160/2,5

y=64

Ahora puedes reemplazar el valor de "y" en (3) para encontrar el valor de "x":

x=120-y

x=120-64

x=56

De acuerdo a esto, la respuesta es que el postulante respondió mal 64 preguntas.

6 0
3 years ago
2/5 - 1/15 show your work
anyanavicka [17]

Answer:

1/5

Step-by-step explanation:

2/5 - 1/5

2-1 = 1

5 Stays the same so your answer is 1/5

6 0
3 years ago
Read 2 more answers
Please help me understand
Svetach [21]

Answer/Step-by-step explanation:

The problem replaces the x with the appropriate input. It is asking for you to find the correct output (y). Looking at the graph, when the point hits -1 on the x value, the value for y is 3. So, the correct output is 3.

3 0
2 years ago
(X-3)2 -0 <br> Ajuda, alguém ajuda?
yanalaym [24]

Answer:

(X- 3)² - 0

(X - 3 )( X - 3 )

x² + 9 - 6x

x² - 6x + 9

a = 1

b = -6

c = 9

8 0
2 years ago
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