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nlexa [21]
3 years ago
5

The table shows a proportional relationship between x

Mathematics
1 answer:
lakkis [162]3 years ago
7 0
What’s the question it’s not showing up for me or you just didn’t type it
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PLEASE HELP! <br> What percent of the circle is shaded? <br><br> Can you also explain to me please?
PolarNik [594]

Answer:

75%

Step-by-step explanation:

Look at it this way since there is 8 what u could do is 1/4 so 2 of them are 25% 4 of them are 50% 6 of them are 75% and all 8 are 100%

5 0
3 years ago
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What fraction of the student voted for Hanna and number of vote for Hanna is 260
natta225 [31]
What is the total number of students? you need to divide 260/total number
7 0
2 years ago
HEEEEEELLLLLLPPPPPPP MEEEEEEEEEE
N76 [4]

Answer:

y=6

Step-by-step explanation:

-4 + 3y =14

3y= 18

y=6

8 0
3 years ago
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Melvin Marshall bought 20 Mothers Day Muffins for Mama-Melanie, Auntie-Marlene, Grandma-Melissa, Cousin Carmela and Sister-Shami
amid [387]

Answer:

The number of  Carmel muffins is 8 and the number of lemon muffins is 12.  

Step-by-step explanation:

Melvin Marshall bought a total of 20 Muffins . Some were camel-glazed muffins and some were lemon. The Carmel muffins cost $3 each while the lemons cost $2.5 . The number of carmel muffins and lemon muffins can be calculated as follows

total number of muffin =  20

Let

a  = number of carmel - glazed muffins

b = number of lemon muffins

a + b = 20.............(i)

The total cost

3a + 2.50b = 54................(ii)

Combine the equations

a + b = 20.............(i)

3a + 2.50b = 54................(ii)

a = 20 - b

insert the value of a in equation (ii)

3(20 - b) + 2.50b = 54

60 - 3b + 2.50b = 54

60 - 54 = 0.5b

0.5b = 6

divide both sides by 0.5

b = 6/0.5

b = 12

Insert the value of b in equation (i)

a + b = 20.............(i)

a + 12 = 20

a = 20 - 12

a = 8

The number of  Carmel muffins is 8 and the number of lemon muffins is 12.  

7 0
2 years ago
Jennifer serves the volleyball to Marsha with an upward velocity of 10.5 ft/s. The ball is 5 feet above the ground when she stri
Katarina [22]

Answer:

  0.98 seconds

Step-by-step explanation:

We assume the height of the volleyball is described by the equation for ballistic motion. We want to find the time it takes for the height to become zero.

__

<h3>motion equation</h3>

The general form of the equation of height for ballistic motion is ...

  h(t)=-16t^2+v_0t+h_0\qquad\text{$v_0$ and $h_0$ are the initial velocity and height}

The coefficient 16 in the equation is an approximation of 1/2g, where g is the acceleration due to gravity in ft/s². This means the units of time and distance are expected to be seconds and feet.

For the problem at hand, the initial velocity and height are 10.5 ft/s and 5 ft. Then the height equation is ...

  h(t) = -16t² +10.5t +5

__

<h3>reaction time</h3>

Marsha has until the ball hits the ground to react to the serve. To find out how long that is, we need to solve the height equation for t when h=0. This is most easily done using the quadratic formula with ...

  • a = -16
  • b = 10.5
  • c = 5

The solution is ...

  t=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}= \dfrac{-10.5\pm\sqrt{10.5^2-4(-16)(5)}}{2(-16)}\\\\=\dfrac{10.5\pm\sqrt{430.25}}{32}=\dfrac{21\pm\sqrt{1721}}{64}

The positive solution is ...

  t ≈ 0.976327 ≈ 0.98

Marsha has about 0.98 seconds to react before the volleyball hits the ground.

_____

<em>Additional comment</em>

After about 0.33 seconds, Marsha knows she doesn't need to react at all. The serve will not clear the net. Its maximum height is about 6' 8 5/8". A women's volleyball net is 7' 4 1/8" high. Jennifer's serve velocity must be at least 12.3 ft/s for the ball to go over the net. With that upward velocity, Marsha has about 1.06 seconds to react.

4 0
1 year ago
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