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2 years ago

Can somebody please tell me this ???

Mathematics

1 answer:

nadya68 [22]2 years ago

8 0

Answer:

(-5,3)(-1,-3)

Step-by-step explanation:

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Devin has $30 on his bus card. Every time he rides a bus, $1.20 is deducted from the value on his card. The amount if money he h

vaieri [72.5K]

Answer:

y = -1.2x + 30

x = 22

x = 15

Step-by-step explanation:

Initially, Devin has $30. Then every time he rides the bus, $1.20 is taken away: y = 30 - 1.2x

Therefore, in slope-intercept form: y = -1.2x + 30

If he has $3.60 on his card, then y = 3.60, so substitute this into the above equation and solve for x:

3.60 = -1.2x + 30

subtract 30 from both sides: -26.4 = -1.2x

divide both sides by -1.2: 22 = x

Therefore Devin has ridden the bus 22 times if he has $3.60 on his card.

Rebecca: y = -1.4x + 33

To determine how many rides on the bus Devin and Rebecca would need to take to have the same amount of value of their bus card, simply equate the equations and solve for x:

Rebecca = Devin

y = y

-1.4x + 33 = 30 - 1.2x

subtract 33 from both sides: -1.4x = -3 - 1.2x

Add 1.2x to both sides: -0.2x = -3

Divide both sides by -0.2: x = 15

Therefore, Devin and Rebecca would both have to take 15 rides on the bus to have the same amount of value of their bus card.

6 0

2 years ago

A conical container can hold 120π cubic centimeters of water. The diameter of the base of the container is 12 centimeters.

nignag [31]

Answer:

A. 10cm

B. 8 times

Step-by-step explanation:

The question is on volume of a conical container

Volume of a cone= $\pi r^{2} h/3$

where r is the radius of base and h is the height of the cone

Given diameter= 12 cm, thus radius r=12/2 =6 cm

$v=\pi r^2h/3 \\120\pi =\pi *6*6*h/3\\120\pi =12\pi h\\10=h$

h=10 cm

If height and diameter were doubled

New height = 2×10 =20 cm

New diameter = 2×12 = 24, r=12 cm

volume = $v=\pi r^2h/3\\v=\pi *12*12*20/3\\v=960\pi$

To find the number of times we divide new volume with the old volume

$N= 960\pi /120\pi \\\\N= 8$

8 0

3 years ago

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10 question please you don't have to do all I need help

andre [41]

Answer

I'm sorry for not being able to help you but this kind of contents are not allowed ߷߷

8 0

3 years ago

Brainlest for answered

Helen [10]

Answer:

Hello! answer: 4/5

Step-by-step explanation:

20 ÷ 5 = 4 25 ÷ 5 = 5 that is 4/5 therefore 4/5 is the answer because we cannot reduce any further HOPE THAT HELPS!

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3 years ago

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In selling an antique vase for 80 a dealer made a profit of 60%of the cost price what was the cost price

pishuonlain [190]

Answer:

Step-by-step explanation:

cost price x .60 = 80

80/.60 = 133.33 was the cost price

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3 years ago