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3 years ago

Please help ASAP. Need it for homework

Mathematics

1 answer:

kondaur [170]3 years ago

6 0

Answer:

Speedy Taxis

Step-by-step explanation:

I solved this by using a graphing calculator. Speedy Taxis shows the least cost for x=30.

You can figure the cost of each for x=30

1.5(30) = 45

1.1(30)+11.5 = 33+11.5 = 44.5 . . . . . lowest cost

1.25(30)+8 = 37.5+8 = 45.5

Speedy Taxis is the cheapest for a trip of 30 miles.

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2 years ago

Solve the following 3 × 3 system. Enter the coordinates of the solution below.

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9514 1404 393

Answer:

(x, y, z) = (-1, 0, -3)

Step-by-step explanation:

We notice that the coefficients of z are such that elimination of the z term from the equations is made easy.

Adding equations 1 and 2:

(2x -3y -2z) +(x +3y +2z) = (4) +(-7)

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Adding equations 2 and 3:

(x +3y +2z) +(-4x -4y -2z) = (-7) +(10)

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3 years ago

PLS HELP ME W THIS QUESTION

QveST [7]

Answer:

Step-by-step explanation:

The formula of a volume of a cone:

$V=\dfrac{1}{3}\pi r^2H$

r - radius

H - height

We have r = 1.9 in and H = 15 in. Substitute:

$V=\dfrac{1}{3}\pi(1.9)^2(15)=\pi(3.61)(5)=18.05\pi\ in^3$

$\pi\approx3\to V\approx18.05\cdot3=54.15\ in^3$

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3 years ago