3 years ago

What’s the number for 2+1=

Mathematics

1 answer:

Cerrena [4.2K]3 years ago

8 0

2+2 is 4 minus one that's 3 quick maths but 2+1 is equal to 3

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X puᴉɟ oʇ ǝʌɐɥ noʎ<br><br><img src="https://tex.z-dn.net/?f=%20%5Cfrac%7Bx%20%7B%7D%5E%7B2%7D%20%7D%7B5%20%7B%7D%5E%7B2%7D%20%7D

Law Incorporation [45]

Hello there! The value of x is 20 or -20

"20 or - 20" is one answer so you are supposed to answer 20 or -20, not choose only one.

Step-by-step explanation:

$\large{ \frac{ {x}^{2} }{ {5}^{2} } = {4}^{2} }$

First, we simplify 5² and 4²

$\large{ \frac{ {x}^{2} }{25} = 16}$

Multiply the whole equation by 25 to get rid of the denominator.

$\large{ \frac{ {x}^{2} }{25} (25) = 16(25)} \\ \large{ {x}^{2} = 400}$

Square both sides and solve the equation.

$\large{ \sqrt{ {x}^{2} } = \pm{ \sqrt{400} }}$

Also don't forget to write "plus or minus" symbol when we are solving a quadratic equation by squaring both sides.

$\large{x = \pm{20}}$

4 0

2 years ago

Let A = { all odd numbers) and B = {1,3,5,7). Is B a subset of A?

Alchen [17]

Answer:

Step-by-step explanation:

Yes

{1,3,5,7} contains the first 4 odd numbers.

{1,2,3,5,7} would not be a subset.

4 0

3 years ago

Read 2 more answers

Fifteen percent of the cars in a parking lot are green. If there are 45 green cars, how many cars are there in the parking lot?

Olegator [25]

45/x =15/100
Cross multiply
15x=4500
Divide both sides by 15
X=300
300 total cars on parking lot

7 0

2 years ago

13) (3 + 7v2)(3 – 7v2)

Dovator [93]

Answer:

the answer to this problem is

9 - 21v^2 + 21v^2 - 49v^4

9 - 49v^4

Step-by-step explanation:

8 0

3 years ago

Jada walks to school. The function D givers her distance from school, in meters, t minutes since she left home. Which equation t

kolbaska11 [484]

Answer:

t(5)=600.................

6 0

3 years ago