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zaharov [31]
3 years ago
9

PLEASE HELP! I REALLY NEED AN ANSWER, I CAN'T FIGURE IT OUT!

Mathematics
1 answer:
uranmaximum [27]3 years ago
8 0

Answer:

2 \frac{1}{4}  - 1 \frac{3}{4}  \\  \frac{(2 \times 4) + 1}{4}  -  \frac{(1 \times 4) + 3}{4}  \\  \frac{8 + 1}{4}  -  \frac{4 + 3}{4}  \\  \frac{9}{4}  -  \frac{7}{4}  \\  \frac{9 - 7}{4}  \\  \frac{2}{4}   \\  \frac{1}{2}

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A hovercraft takes off from a platform.
lubasha [3.4K]

Answer:

81 meters.

Step-by-step explanation:

The height (in meters), h(x) of a hovercraft x seconds after takeoff, is modeled by:

h(x)=-3(x-3)^2+108

We are to determine its height at the time of takeoff.

Now, at the time of takeoff, x=0.

We substitute x=0 to solve for h.

h(0)=-3(0-3)^2+108\\=-3(-3)^2+108\\=-3(9)+108\\=-27+108\\=81$ meters

The height of the hovercraft at takeoff is 81 meters.

7 0
3 years ago
Read 2 more answers
14. Molly puts two shapes together to make a new shape. The new shape has 6 sides and 6 vertices. Which two shapes did she use?
olganol [36]

She used two trapezoids.

She put one trapezoid on top and one on the bottom.

The shape she ends up making is a hexagon.

3 0
3 years ago
Helpppp PLEASEEE AHHHHHH
Allisa [31]

Answer:

24

Step-by-step explanation:

18+12-6

6 0
2 years ago
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Find the missing number ____:7 = 12:21 <br><br><br> A) 3<br><br> B) 14 <br><br> C) 4 <br><br> D) 12
LUCKY_DIMON [66]
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6 0
3 years ago
Read 2 more answers
What is the solution to the system of equations?
yarga [219]

Answer:

(2, - 4 )

Step-by-step explanation:

Given the 2 equations

x + 2y = - 6 → (1)

3x + y = 2 → (2)

Multiplying (2) by - 2 and adding to (1) will eliminate the term in y

- 6x - 2y = - 4 → (3)

Add (1) and (3) term by term to eliminate y

- 5x = - 10 ( divide both sides by - 5 )

x = 2

Substitute x = 2 into either of the 2 equations and solve for y

Substituting into (1)

2 + 2y = - 6 ( subtract 2 from both sides )

2y = - 8 ( divide both sides by 2 )

y = - 4

Solution is (2, - 4 )

8 0
4 years ago
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