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3 years ago

The 12-inch diameter pizza for $12.50 or the 20-inch diameter pizza for $17.50.

Mathematics

1 answer:

Firdavs [7]3 years ago

5 0

Answer:

20 inch

Step-by-step explanation:

the 12" pizza for $12.50 works out to 11 cents per square inch and the 20" for $17.50 works out to 5.5 cents per square inch. So, basically, you're getting twice as much pizza for only $5 more if you go the route of the 20

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A bag contains 42 red marbles, 6 white marbles, and 8 gray marbles. You randomly pick out a marble, record its color, and put it

Elanso [62]

For any single draw,

$\mathbb P(\text{white})=\dfrac6{42+6+8}=\dfrac6{56}$
$\mathbb P(\text{gray})=\dfrac8{42+6+8}=\dfrac8{56}$

Drawing a white marble or a gray marble are disjoint events; only one of them can happen. So

$\mathbb P(\text{white or gray})=\mathbb P(\text{white})+\mathbb P(\text{gray})-\underbrace{\mathbb P(\text{white and gray})}_0$
$\mathbb P(\text{white or gray})=\dfrac6{56}+\dfrac8{56}=\dfrac{14}{56}$

Out of 224 draws, you should expect $\dfrac{14}{56}\times224=56$ of the marbles to be either white or gray.

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3 years ago

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irga5000 [103]

Answer:

x= 2 and y = -4

Step-by-step explanation:

8x + 3y = 4 ---------------------------------(1)

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-21x + 15y =-102----------------------------(4)

Subtract equation (4) from equation (3)

61x = 122

Divide both-side of the equation by 61

61x/61 = 122/61

(At the left-hand side of the equation 61 will cancel-out 61 leaving us with just x, while at the left-hand side of the equation 122 will be divided by 61)

x = 122/61

x=2

Substitute x= 2 into equation (1)

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8(2) + 3y = 4

16 + 3y = 4

Subtract 16 from both-side of the equation

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3y = -12

Divide both-side of the equation by 3

3y/3 = -12/3

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3 years ago

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kaheart [24]

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π≈3.14

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2 years ago

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kiruha [24]

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3 years ago

Write an equation or system of equations to solve the problem below.

VashaNatasha [74]

Equations:

2x+105=-3x+130

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Subtract 130 from both sides

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x=5 

Plug back in

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