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nekit [7.7K]
3 years ago
7

If x=3, calculate the value of: X squared + 2x

Mathematics
2 answers:
vlada-n [284]3 years ago
5 0

x^2+2x\\\\\text{If x = 3,}\\\\3^2 + 2(3) = 9 + 6  = 15

docker41 [41]3 years ago
5 0

Answer:

As we are told that the value of x is equal to 3, we are able to substitute this into our equation, so it becomes 2(3)^2. We then use the rules of BIDMAS, so we must square the number 3 first (meaning we multiply the number by itself), and then multiply it by two. 3^2 is 9, and 9 times 2 = 18. Therefore, the answer is 18.

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The equation of a straight line is y+10=5x
MariettaO [177]

Answer:

y=5x-10

Step-by-step explanation:

y+10=5x

y=5x-10

4 0
4 years ago
Which expression is equivalent to 12(2+3x−6) ?
matrenka [14]
Simplify: 12(2 + 3x - 6)
= (12)(2 + 3x + - 6) = (12)(2) + (12)(3x) + (12)( - 6)
= 24 + 36x - 72
Answer = 36x - 48



2: Factor: 

36x - 48 
= 12(3x -4)

Answer 
= 12(3x -4)



3: <span>12(2+3x−6)

= 12(3x + 2 - 6)

= 12(3x - 4)


Your Answer  would be (A).

3x - 4</span>
7 0
3 years ago
Read 2 more answers
con 16 barras de mantequilla se prepararon 20 postres ?que fraccion del total de mantequilla corresponde a cada postre
MatroZZZ [7]

De ahí que la fracción de la mantequilla total que corresponde a cada postre sea 1/4

Si con 16 barras de mantequilla se prepararon 20 postres, esto se puede expresar como:

16 pegatinas = 20 postres

Para obtener la fracción del total de mantequilla que corresponde a cada postre, podemos escribir;

x = 1 postre

Divide ambas expresiones

16 / x = 20/1

20 veces = 16 * 1

20x = 16

x = 16/20

x = 4/5

De ahí que la fracción de la mantequilla total que corresponde a cada postre sea 1/4

Obtenga más información aquí: brainly.com/question/1878884

5 0
2 years ago
the perez family has a rectangle fish tank. How much water will the tank hold if its length is 3 feet, its width is 2 feet, and
myrzilka [38]

V = 3 x 2 x 3 = 18

answer

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7 0
3 years ago
Lim (x+1) (3x^2-9)<br> X2
mafiozo [28]

Answer:

\lim_{x \to 2} (x+1)(3x^2-9) = 9

Step-by-step explanation:

Step 1: Write out limit

\lim_{x \to 2} (x+1)(3x^2-9)

Step 2: Evaluate

(2 + 1)(3(2)² - 9)

3(3(4) - 9)

3(12 - 9)

3(3)

9

5 0
3 years ago
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