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SashulF [63]
3 years ago
7

I need to know how to do this fast

Mathematics
2 answers:
Brut [27]3 years ago
7 0
Photo math works, but just saying two step equations are pretty fun! The goal is to get the variable (x) by itself; alone on one side of the equal sign. I’m going to explain #1. 7x has to be by itself, so you will move the +9 over to the other side of the equal sign. When you move a number/thing over the equal sign, it turns negative (negative turns to positive, positive turns to negative). So, it will become 7x = 58 -9. You will do simple subtraction to get 7x = 49. Divide each side by 7 to get x by itself, and you have x = 7!
Serhud [2]3 years ago
4 0
Download photo math it works good on those kinds of problems
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Enter the ratio as a fraction in lowest terms<br><br> 30 minutes to 27 minutes
vampirchik [111]

Step-by-step explanation:

ratio will be

30/27

= 10/9

=10:9

7 0
3 years ago
Read 2 more answers
An article in USA Today stated that Internal surveys paid for by directory assistance providers show that even the most accurate
MariettaO [177]

Answer:

a. 11.26 % b. 6.76 %. It appears so since 6.76 % ≠ 15 %

Step-by-step explanation:

a. This is a binomial probability.

Let q = probability of giving out wrong number = 15 % = 0.15

p = probability of not giving out wrong number = 1 - q = 1 - 0.15 = 0.75

For a binomial probability, P(x) = ⁿCₓqˣpⁿ⁻ˣ. With n = 10 and x = 1, the probability of getting a number wrong P(x = 1) = ¹⁰C₁q¹p¹⁰⁻¹

= 10(0.15)(0.75)⁹

= 1.5(0.0751)

= 0.1126

= 11.26 %

b. At most one wrong is P(x ≤ 1) = P(0) + P(1)

= ¹⁰C₀q⁰p¹⁰⁻⁰ + ¹⁰C₁q¹p¹⁰⁻¹

= 1 × 1 × (0.75)¹⁰ + 10(0.15)(0.75)⁹

= 0.0563 + 0.01126

= 0.06756

= 6.756 %

≅ 6.76 %

Since the probability of at most one wrong number i got P(x ≤ 1) = 6.76 % ≠ 15 % the original probability of at most one are not equal, it thus appears that the original probability of 15 % is wrong.

3 0
3 years ago
Is it impossible to raise the number to the power of to and get a number less than the original number
finlep [7]
No (unless you're talking about a whole number), for example...
0.2^2 = 0.04
8 0
3 years ago
-9h - 15 =30<br> plz answer lol
Lemur [1.5K]

[Add] 1.

-9h = 30 + 15

[Simplify] 2.

-9h = 45

[Divide] 3.

h = -  45/9   ( A negative Divide)

[Answer] 4.

h = -5

4 0
3 years ago
Read 2 more answers
Please help!! I really need it.
Andrews [41]
It’s a I think but I’m not sure
7 0
3 years ago
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