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3 years ago

7

When Aaliyah picks any number between 1 and 20, doubles it, adds 6, divides it by 2 and subtracts 3, she always gets the number

she started with.

1 answer:

velikii [3]3 years ago

7 0

(2x + 6) ÷ 2 - 3
= 2(x+3) ÷ 2 - 3
= x + 3 - 3
= x

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×WILL MARK AS BRAINLIEST×<br>Solve the equation for b, d and x

Lera25 [3.4K]

Solve for d:
(3 (a + x))/b = 2 d - 3 c
(3 (a + x))/b = 2 d - 3 c is equivalent to 2 d - 3 c = (3 (a + x))/b:
2 d - 3 c = (3 (a + x))/b
Add 3 c to both sides:
2 d = 3 c + (3 (a + x))/b
Divide both sides by 2:
Answer: d = (3 c)/2 + (3 (a + x))/(2 b)

-----------------------------

Solve for x:
(3 (a + x))/b = 2 d - 3 c
Multiply both sides by b/3:
a + x = (2 b d)/3 - b c
Subtract a from both sides:
Answer: x = (2 b d)/3 + (-a - b c)

____________________________

Solve for b:
(3 (a + x))/b = 2 d - 3 c
Take the reciprocal of both sides:
b/(3 (a + x)) = 1/(2 d - 3 c)
Multiply both sides by 3 (a + x):
Answer: b = (3 (a + x))/(2 d - 3 c)

5 0

3 years ago

Yeah 82,300,000 scientific notation

IceJOKER [234]

Answer:

Dear user,

Answer to your query is provided below

82300000 in scientific notation = 8.23 × 10^7.

Step-by-step explanation:

Scientific notation is a way of writing very large or very small numbers. A number is written in scientific notation when a number between 1 and 10 is multiplied by a power of 10. For example, 650,000,000 can be written in scientific notation as 6.5 ✕ 10^8.

4 0

3 years ago

Read 2 more answers

35 of the apartments have a balcony and 55 of them don't. An apartment is randomly selected as part of a survey. What is the pro

kobusy [5.1K]

Answer:

39%

Step-by-step explanation:

It is given that 35 apartments have balconies in them.

While 55 apartments do not have balconies in them.

Total number of balconies is the sum of the apartments. i.e. 35 + 55

= 90 apartments

Therefore for the survey when an apartment is randomly selected, the percentage of the probability of the apartment to have a balcony can be found out by dividing 35 by 90 and then multiply by 100.

i.e.

$=\frac{35}{90}$

= 0.38888888

Multiplying by 100, we get

= 0.388888 x 100

= 38.8888 %

= 39 %

3 0

3 years ago

Solve the following quadratic function by using the quadratic formula: x^2 +<br> 2x - 1 = 2 *

elena55 [62]

Answer:

x = 1 or x = -3

Step-by-step explanation:

$ax^{2}$ + bx + c = 0

x = $\frac{-b±\sqrt{b^{2}-4ac } }{2a\\}$

as $x^{2}$ + 2x - 1 = 2 ⇔ $x^{2}$ + 2x - 3 = 0, its solution is

x = $\frac{-2±\sqrt{2^{2}-4 *1*(-3)} }{2*1}$

= $\frac{-2±\sqrt{4+12} }{2}$ = $\frac{-2±\sqrt{16} }{2}$ = $\frac{-2±\ 4 }{2}$

therefore, x = 1 or x = -3

hope this helps! :D

have a miraculous day, and brainliest is immensely appreciated!! <3

4 0

3 years ago

2 + 16 + 48 factorizar <br> alguien que me ayude??

Anettt [7]

Answer:

factorizar:

x2−16x + 48

Utilizando el método AC.

(x−12) (x−4)

<h2>Porfavor Brailiest!</h2>

8 0

3 years ago

Read 2 more answers