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pshichka [43]
3 years ago
7

Over the summer, Jackie played video games 3 hours per day. When school began in the fall, she was only allowed to play video ga

mes for half an hour per day What is the percent decrease? Round to the nearest percent.
Mathematics
1 answer:
Sliva [168]3 years ago
5 0
The first thing you need to calculate is how much less time she plays per day. 3 hours - X = 30 minutesx = 2.5 hours Now that you know how much time has decreased, you need to figure out what percent of the original time the decreased time is. In other words, decreased time = x * 3 hours Plug in the decreased time to get:2.5 hours = x * 3 hoursx = 2.5/3x = 0.83333333333333 = 83.333333% rounds to 83%. Therefore, 30 minutes is a 83% decrease in playing time from the original time of 3 hours.
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5/6=x-10/3x+6 solution?
Ivan

Answer:

\boxed{ \bold{ \huge{ \boxed{ \sf{x =  - 10}}}}}

Step-by-step explanation:

\sf{ \frac{5}{6}  =  \frac{x - 10}{3x + 6} }

Apply cross product property

⇒\sf{5(3x + 6) = 6( x - 10)}

Distribute 5 through the parentheses

⇒\sf{15x + 30 = 6( x - 10)}

Distribute 6 through the parentheses

⇒\sf{15x + 30 = 6x - 60}

Move 6x to left hand side and change it's sign

⇒\sf{15x - 6x  + 30 =  - 60}

Collect like terms

⇒\sf{9x + 30 =  - 60}

Move 30 to right hand side and change it's sign

⇒\sf{9x =  - 60 - 30}

Calculate

⇒\sf{9x =  - 90}

Divide both sides of the equation by 9

⇒\sf{ \frac{9x}{9}  =   \frac{ - 90}{9} }

Calculate

⇒\sf{x =  - 10}

Hope I helped!

Best regards!!

3 0
2 years ago
Directions: Write an integer to model each situation.
Leni [432]

Step-by-step explanation:

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8 0
2 years ago
Of the people who fished at Clearwater Park today, 48 had a fishing license, 32and did not. Of the people who fished at Mountain
horrorfan [7]

Answer:

The probability that the fisher chosen from Clearwater did not have a license and the fisher chosen from Mountain View had a license is 0.32.

Step-by-step explanation:

Denote the events as follows:

<em>X</em> = a fisher at Clearwater Park had a fishing license

<em>Y</em> = a fisher at Mountain View Park had a fishing license

The two events are independent.

The information provided is:

n (X) = 48

n (X') = 32

n (Y) = 72

n (Y') = 18

Then,

N (X) = n (X) + n (X')

        = 48 + 32

        = 80

N (Y) = n (Y) + n (Y')

        = 72 + 18

        = 90

Compute the probability that the fisher chosen from Clearwater did not have a license and the fisher chosen from Mountain View had a license as follows:

P(X'\cap Y)=P(X')\times P(Y)

                 =\frac{n(X')}{N(X)}\times \frac{n(Y)}{N(Y)} \\\\=\frac{32}{80}\times\frac{72}{90}\\\\=0.32

Thus, the probability that the fisher chosen from Clearwater did not have a license and the fisher chosen from Mountain View had a license is 0.32.

7 0
3 years ago
If xy- 3y²= 15 ,find the value of x when y=2
rjkz [21]

Answer:

X=13.5

Step-by-step explanation:

Y=2 so

2x-3*2^2=15

2x-12=15

2x=27

X=13.5

5 0
3 years ago
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Help please !! i will give brainliest
grin007 [14]

Answer:

k = \frac{5}{6}

Step-by-step explanation:

The scale factor is calculated as the ratio of corresponding sides, figure on right to figure on left, that is

k = \frac{30}{36} = \frac{5}{6} ← in simplest form

6 0
2 years ago
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