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katrin2010 [14]
3 years ago
6

X2 – 4x – 5 = 0 answer in quadratic form

Mathematics
1 answer:
juin [17]3 years ago
4 0

(x - 5)(x + 1) = 0 \\ x - 5 = 0 \\ x = 5 \\ x + 1 = 0 \\ x =  - 1
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Given: ⅓ (18x + 27) = 81 Prove: x = 12
sasho [114]

Answer:

Firstly, rewrite the equation:

⅓ (18 + 27) = 81

Substitute x for the given number of it's supposed equivalent.

In this case x = 12.

⅓ (18(12) + 27) = 81

Solve using PEMDAS and simplify what is in the parenthesis first. Then, multiply.

(18 x 12) + 27 = 243

Now, solving using PEMDAS, multiply the total of what you got that was originally in the parenthesis by ⅓ .

⅓ (243) = 81

When you multiple these number they are equivalent to 81.

81 = 81

Since the equation given, when substituted x for 12, is equivalent to 81, this proves that substituting x for 12 makes this equation true.

4 0
3 years ago
Number seven on the page
prohojiy [21]
Multiply 9.75 by 1.5 to get 14.63 fluid ounces.
6 0
3 years ago
3. You are selling hot cocoa at an
Liono4ka [1.6K]

Answer:

you need to sell 60 cups

Step-by-step explanation:

48÷0.80= 60 cups

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5 0
3 years ago
Which is the simplified form of the expression (6^-2x6^5)^-3?
Andreas93 [3]

Answer:


Step-by-step explanation:


6

7 0
4 years ago
Read 2 more answers
Carolina y su mamá compraron tres tortas de sabores diferentes para la reunión con sus amigos del colegio. De la torta de naranj
Karo-lina-s [1.5K]

Answer: 2 1/5 partes  de torta

Step-by-step explanation:

Para contestar esta pregunta debemos sumar cada parte de torta:

0.7+9/12+6/8 =

Convertimos las fracciones en decimales, para tener todos los valores expresados de la misma forma. Dividiendo:

9/12=0.75

6/8=0.75

Sumamos :

0.7+0.75+0.75 = 2.2 partes = 2 1/5 partes

En conclusión, Carolina y sus amigos comieron 2 1/5 partes de torta.

5 0
3 years ago
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