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Lubov Fominskaja [6]
2 years ago
6

Find the sum of (x-4)+(2x−7)

Mathematics
2 answers:
Vinvika [58]2 years ago
4 0
It is: 3x-11
we have to remove the unnecessary parentheses then we have to expand: x-4+2x-7
Finally we collect the like terms and calculate
that’s why the answer is 3x-11
____ [38]2 years ago
3 0

Answer:

3x - 11

Step-by-step explanation:

( x - 4 ) + ( 2x − 7 )

*it's better to take away the parenthesis

x - 4 + 2x - 7

Combine like terms

( x with 2x, and -4 with -7)

3x - 11

And you cannot simplify it anymore

Hope this helped!

Have a supercalifragilisticexpialidocious day!

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Fraction as a decimal , use bar notation id necessary
Charra [1.4K]
So it should be to the nearest tenth or hundredth ?
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3 years ago
If you were to invest only $1, how much simple interest would you have if the rate was 4.6%? Use the following years for each sc
tiny-mole [99]

Answer:

30 years: 1.38

45 years: 2.07

65 years:2.99

Step-by-step explanation:

$1x0.046=0.046

0.046x30=1.38

0.046x45=2.07

0.046x65=2.99

this is assuming that it gets interest yearly and that they don't want the original amount included.

5 0
3 years ago
Read 2 more answers
Which of the following equations is equivalent to s=πr^2h
suter [353]

Answer:

h = s / π.r²

Step-by-step explanation:

the given equation is s = π.r².h

Now if we have to calculate the value of h from the given formula then we will solve it so that h remains alone on one side of the equation.

This only possible when we divide term on both the sides by π.r²

s/π.r² = π.r².h/π.r²

h = s / π.r²

Therefore h = s / π.r² is the right option.

5 0
3 years ago
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PLEASE HELP DUE IN 15 MINUTES WILL GIVE BRAINLIEST!
AVprozaik [17]

4m = 12x + 40

8x + 8x + 12x + 40 + 4m = 360

28x + 40 + 12x + 40 = 360

x = 7

m = 12(7) + 40 = 124

7 0
3 years ago
Una persona asegura que su casa tiene forma rectangular y que el perímetro de la misma es de 18 m y que además, su área es de 21
leva [86]

Considerando las fórmulas para el perímetro y el área de un rectángulo, hay que se chega en una <u>eccuación cuadrática sin solución</u>, o sea, las medidas no son posibles y la persona estaba mintiendo.

<h3>¿Cuál es la fórmula para el perímetro y el área de un rectángulo?</h3>

Considerando que las dimensiones son l y w, hay que:

  • El perímetro es: P = 2(l + w).
  • El área es: A = lw.

El <u>perímetro es de 18 m</u>, o sea:

2(l + w) = 18

l + w = 9

l = 9- w.

El <u>área es de 21 m²</u>, o sea:

lw = 21

(9- w)w = 21

-w² + 9 - 21 = 0

w² - 9w + 21 = 0

El discriminante es dado por:

D = 9² - 4 x 1 x 21 = -3.

El discriminante negativo implica que la <u>eccuación cuadrática no tiene solución</u>, o sea, las medidas no son posibles y la persona estaba mintiendo.

Puede-se aprender más a cerca de el perímetro y el área de un rectángulo en brainly.com/question/26475963

#SPJ1

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2 years ago
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