Right an Algebraic expression for 3 times X squared minus 4 times X

Mathematics

1 answer:

slava [35]3 years ago

8 0

3 times X squared minus 4 times X =

$3x^2-4x$

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A thermometer falls from a weather

Nesterboy [21]

Answer:

It will take 22 seconds for the thermometer to hit the ground.

Step-by-step explanation:

A thermometer falls from a weather balloon at a height of 7,744 ft.

This means that the initial height is of 7744ft.

h(t) = -16t2 + initial height

$h(t) = -16t^2 + 7744$

How many seconds will it take for the thermometer to hit the ground?

This is t for which $h(t) = 0$ . So

$0 = -16t^2 + 7744$

$16t^2 = 0 + 7744$

$t^2 = \frac{7744}{16}$

$t = \sqrt{\frac{7744}{16}}$

$t = 22$

It will take 22 seconds for the thermometer to hit the ground.

6 0

3 years ago

The diagonals of a rhombus are 21 m and 32 m. What is the area of the rhombus?<br> 30 POINTS

Wittaler [7]

I have included attachment below

so since a rhombus is 2 pairs of paralell sides, we can cut it into 4 triangles
we can see that we can take the bottom 2 triangles and put them on top to get a rectangle that is width 21 and height 32/2 (16=height
area of rectangle=legnth times width=16 times 21=336 m^2

answer is 336 m^2