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Alecsey [184]
3 years ago
10

Can you guys please help me

Mathematics
1 answer:
m_a_m_a [10]3 years ago
4 0
The answer is B. First turn all the results from the spelling competition into fractions (or ratios).
Megan: 45/50 = 9/10
Justin: 27/30 = 9/10
Fernando: 84/120 = 7/10
Then, use this information to find which answer is correct.
Have a nice day! :)
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On a local sports​ team, 30 ​% of 50 players are ​-handed. How many left ​-handed players are​ there?
goldfiish [28.3K]

Answer:

35 players are left-handed

Step-by-step explanation:

50% of 50 is 25

40% of 50 is 20

30% of 50 is 15

50 - 15 = 35

7 0
3 years ago
ILL GIVE YOU BRAINLYIST
Vladimir79 [104]

Explanation:

If it's the top numbers, it's 55 degrees.

Bottom is 125 degree angle.

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What is the value of x in the equation ? 2.5(6x-4)=10+4(1.5+.05x)
natima [27]

Answer:

x=2

Step-by-step explanation:

Distribute

15x-10=10+6+2x

simplify

15x-10=16+2x

subtract 2x to get x on one side

13x-10=16

add 10

13x=26

divide

x=2

8 0
3 years ago
A radioactive substance decays exponentially. A scientist begins with 190 milligrams of a radioactive substance. After 19 hours,
Lelu [443]

Answer:

  51 milligrams

Step-by-step explanation:

Exponential growth or decay can be modeled by the equation ...

  y = a·b^(x/c)

where 'a' is the initial value, 'b' is the "growth factor", and 'c' is the time period over which that growth factor applies. The time period units for 'c' and x need to be the same.

In this problem, we're told the initial value is a = 190 mg, and the value decays to 95 mg in 19 hours. This tells us the "growth factor" is ...

  b = 95/190 = 1/2

  c = 19 hours

Then, for x in hours the remaining amount can be modeled by ...

  y = 190·(1/2)^(x/19)

__

After 36 hours, we have x=36, so the remaining amount is ...

  y = 190·(1/2)^(36/19) ≈ 51.095 . . . . milligrams

About 51 mg will remain after 36 hours.

8 0
2 years ago
Round this number to the nearest 1000th place.
GarryVolchara [31]

The 1000th place is the 3rd number to the right of the decimal point.

You need to look at the fourth number, if it is a 5 or higher, you round the 3rd number up, if it is lower than 5 the 3rd number stays what it is.

3,333.8485

The fourth number is a 5, so you would round the third number, which is an 8 up to 9.

The number becomes E. 3,333.849

Rain total would be adding all the days together:

3 + 2.58 + 1.2 + 1.3 + 0.68 + 0.5 + 2.15 = 11.41

The answer is D. 11.41

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9.68 x 0.05 = 0.484 = 0.48

9.68 + 0.48 = 10.16

$10.16 is greater than $10, so you don't have enough money.

The answer is B. No

3 0
3 years ago
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