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3 years ago

Let m (x)=2x^2+6x-7 determine m (3)

1 answer:

4 0

M(x) = 2x^2 + 6x - 7.......find m(3) by subbing in 3 for every x
m(3) = 2(3^2) + 6(3) - 7
m(3) = 2(9) + 18 - 7
m(3) = 18 + 18 - 7
m(3) = 29 <==

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A dessert shop bought 20.6 gallons of ice cream. There are approximately 3.8 liters in 1 gallon. Which measurement is the closes

blagie [28]

Answer:

78 Liters

Step-by-step explanation:

20.6 x 3.8 = 78.28 liters Rounds up to 78 liters

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2 years ago

Simone raced 280 km from Perry to Medford and then idled back. If the round trip took 7 hours, what was Simone's average speed i

Gwar [14]

Answer:

80 KPH

Step-by-step explanation:

The total trip was 280*2 (the trip to perry and then to come back home)

divide this by the 7 hours it took him, and you get your answer. Enjoy!

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2 years ago

Hey who ever can help me, I give 25 points

Nadusha1986 [10]

4x+2y=18

-2(2x+3y=15)=-4x-6y=-30

4x+2y=18

-4x-6y=-30

-4y=-12

y=3

2x+3(3)=15

2x+9=15

2x=6

x=3

(3,3)

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2 years ago

The ubiquitous 12oz aluminum cans used to distribute drinks in this country have a diameter of approximately 2.75 inches and a h

gayaneshka [121]

Answer:

3.5%

Step-by-step explanation:

The volume of a cylinder = $\pi r^2h$

r = radius of cylinder,

h = height of cylinder

For the non-optimal can,

r = 2.75/2 = 1.375

h = 5.0

$V = \pi(1.375^2)\times 5.0 = 9.453125\pi$

For the optimal can,

d/h = 1,

d = h

2r = h

r = h/2

$V = \pi\left(\dfrac{h}{2}\right)^2\times h = \pi\left(\dfrac{h^3}{4}\right)$

They have the same volume.

$\pi\dfrac{h^3}{4} = 9.453125\pi$

$h^3 = 37.8125$

$h=3.36$ (This is the height of the optimal can)

$r = \dfrac{3.36}{2} = 1.68$ (This is the radius of the optimal can)

The area of a cylinder is

$A = 2\pi r(r+h)$

For the non-optimal can,

$A = 2\pi\times\dfrac{2.75}{2}\left(\dfrac{2.75}{2}+5.0\right) = 17.53125\pi$

For the optimal can,

$A = 2\pi\times1.68\left(1.68+3.36\right) = 16.9344\pi$

Amount of aluminum saved, as a percentage of the amount used to make the optimal cans = $\dfrac{17.53125\pi - 16.9344\pi}{16.9344\pi}\times 100\% = 3.5\%$

5 0

3 years ago

HELP!

creativ13 [48]

AAS Theorem is what should be used I believe. The Sides are congruent and so are the 90 degree angles, the angles that are next to eachother on the left are evenly split by the transverse theorem. So AAS states that two angles and a side being equivelant on both triangles makes them congruent.

7 0

2 years ago