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bagirrra123 [75]
2 years ago
5

I’ve been stuck on this question for awhile and i can’t answer it

Mathematics
1 answer:
vfiekz [6]2 years ago
8 0

Answer:

PEMDAS.

parenthesis first, then exponents, next would be mutiplication/division, then lastple add/subtract.

Step-by-step explanation:

first would be 15-7, then the 3^2, etc

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Find the variable 5x+8=3x
murzikaleks [220]

Answer:

-4 =x

Step-by-step explanation:

5x+8=3x

Subtract 5x from each side

5x-5x+8=3x-5x

8 = -2x

Divide by -2

8/-2 = -2x/-2

-4 =x

6 0
3 years ago
Read 2 more answers
For each question, each pair of triangles are similar but not drawn to scale. Calculate any lettered lengths.
Karolina [17]

Answer:

a. 20

b. 5

Step-by-step explanation:

The scale factor is 5 because 6×5=30

a. 4×5=20

b. 25÷5=5

8 0
2 years ago
En una hoja de papel cuyo perímetro es de 96 centímetros, se quiere imprimir un volante de manera que el área impresa sea un rec
elixir [45]

Answer:

El perímetro de la región impresa es 72 cm y su área es 288 cm².  

Step-by-step explanation:

1. Tenemos el perímetro de la hoja de papel:

P₁ = 96 cm = 2l₁ + 2a₁  (1)  

Como sabemos el margen superior, inferior, izquierdo y derecho podemos encontrar la relación entre el largo y ancho del rectángulo interno (región impresa) con el largo (l) y ancho (a) del rectángulo externo (hoja de papel):      

l_{2} = l_{1} - (m_{s} + m_{i}) = l_{1} - (3 cm + 2 cm) = l_{1} - 5 cm  (2)            

a_{2} = a_{1} - (m_{d} + m_{iz}) = a_{1} - (2 cm + 5 cm) = a_{1} - 7 cm   (3)    

El perímetro del rectángulo interno es:

P_{2} = 2l_{2} + 2a_{2}    (4)

Introduciendo la ecuación (2) y (3) en (4):

P_{2} = 2l_{2} + 2a_{2} = 2(l_{1} - 5 cm) + 2(a_{1} - 7 cm) = 2l_{1} + 2a_{1} - 10 cm - 14 cm = 96 cm - 24 cm = 72 cm  

Por lo tanto el perímetro del rectángulo interno (región impresa) es 72 cm.

 

2. Ahora para encontrar el área rectángulo interno debemos encontrar el largo y ancho del mismo, sabiendo que:

l_{2} = 2a_{2}     (5)

Introduciendo (5) en (4):

P_{2} = 2l_{2} + 2a_{2} = 2*2a_{2} + 2a_{2} = 6a_{2}

a_{2} = \frac{P_{2}}{6} = \frac{72 cm}{6} = 12 cm

l_{2} = 2a_{2} = 2*12 cm = 24 cm

Entonces el área es:

A_{2} = l_{2}*a_{2} = 12 cm*24 cm = 288 cm^{2}

Por lo tanto el área del rectágulo interno (región impresa) es 288 cm².      

Espero que te sea de utilidad!  

7 0
2 years ago
dvd cases are sold in packages of 9 padded mailing envelopes are sold in packets of 3 what is the least number of cases and enve
Lostsunrise [7]
Im lost at this sorry, hope sum1 helps you out on this tho!
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3 years ago
I need help with all these questions
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6. 13
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