3. Five less than twice a number is 7.

Mathematics

2 answers:

Ainat [17]3 years ago

8 0

Answer: 2a -5 = 7 and a = 6

Step-by-step explanation:

If 5 is less than twice a, the the expression will be 2a -5, since 2 a is the same as 2 times a, and 5 less than 2a is the same as subtracting 5 from 2a. "is" is the same as equal to, so the whole expression has to equal 7.

2a - 5 = 7 You can solve for a by adding 5 to both sides.

+5 +5

2a = 12 Now divide both sides by 2.

a = 6.

Vera_Pavlovna [14]3 years ago

7 0

Answer:

2x-5=7 As an expression

x=6

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AlexFokin [52]

Answer:

$258\quad \mathrm{Remainder}\quad \:0$

Step-by-step explanation:

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Long story short ,

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6 0

3 years ago

Which of the following steps can be performed so that the square root property may easily be applied to 2x2 = 16? (1 point)

Ivan

Answer:

$\Large \boxed{\mathrm{Option \ 2}}$

Step-by-step explanation:

$2x^2 =16$

The square root property requires a quantity squared by itself on one side of the equation. The only quantity squared is x, so divide both sides by 2 before applying the square root property.

The x variable should be isolated on one side of the equation. The x variable is squared so before performing the square root property where we take the square root of both sides, we divide both sides by 2, then take the square root of both sides.

Dividing both sides by 2.

$\displaystyle \frac{2x^2 }{2} =\frac{16}{2}$