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Nina [5.8K]
3 years ago
7

Write an expression that is equivalent to 5(x + 2) - 7(x + 2)?

Mathematics
2 answers:
sergey [27]3 years ago
6 0
5x +10-7x-14
-2+10-14
-2x-4
bekas [8.4K]3 years ago
3 0

Answer:

-2x-4

Step-by-step explanation:

Just simplify

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The number 48 can be written in the form 2n x 3. find the value of n!
kolezko [41]

Answer: n =8

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Reverse the two digits of my age, divide by three, add 20, and the result is my age. How many years old am I
lapo4ka [179]

Answer:

  • 48 years old.

Step-by-step explanation:

Let the age be xy or 10x + y.

Reverse the two digits of my age, divide by three, add 20, and the result is my age, convert this to equation:

  • (10y + x)/3 + 20 = 10x + y
  • (10y + x)/3 = 10x + y - 20
  • 10y + x = 3(10x + y - 20)
  • 10y + x = 30x + 3y - 60
  • 30x - x + 3y - 10y = 60
  • 29x - 7y = 60

We should consider both x and y are between 1 and 9 since both the age and its reverse are 2-digit numbers.

Possible options for x are:

  • 29x ≥ 7*1 + 60 = 67 ⇒ x > 2, at minimum value of y,

and

  • 29x ≤ 7*9 + 60 = 123 ⇒ x < 5, at maximum value of y.

So x can be 3 or 4.

<h3>If x = 3</h3>

  • 29*3 - 7y = 60
  • 87 - 7y = 60
  • 7y = 27
  • y = 27/7, discarded as fraction.

<h3>If x = 4</h3>

  • 29*4 - 7y = 60
  • 116 - 7y = 60
  • 7y = 56
  • y = 8

So the age is 48.

6 0
1 year ago
HELPPP PLZ I WILL GIVE 15囧rz and brainliest
kati45 [8]

Answer:

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Step-by-step explanation:

6 0
3 years ago
Can someone pls help me
Kipish [7]

Answer:

C

Step-by-step explanation:

9x² - 4y^{6}

can be factored as a difference of squares , that is

(U + V)(U - V)

9x² - 4y^{6} = (3x)² - (2y³)²

with U = 2x and V = 2y³

8 0
2 years ago
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Find the first three terms of f(n + 1) = f(n) + 8, if f(1) = 27.
dezoksy [38]
I hope this helps you



f (1+1)= f (1)+8


f (2)= 27+8


f (2)=35



f (2+1)= f (2)+8



f (3)= 35+8


f (3)=43



3 0
3 years ago
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