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2 years ago

13

Which expression is equivalent to the area of metal sheet required to make this square-shaped traffic sign? I WILL GIVE BRAINLYI

EST!!

1 answer:

Dmitry_Shevchenko [17]2 years ago

6 0

Answer:

4x^2+4x-1

Step-by-step explanation:

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5 hours a week to reach her goal.

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3 years ago

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The height of a flare fired from the deck of a ship in distress can be modeled by h=-16t^2+104t+56, where h is the height of the

grin007 [14]

Answer:

7 seconds.

Step-by-step explanation:

We have been given that the height of a flare fired from the deck of a ship in distress can be modeled by $h=-16t^2+104t+56$ , where h is the height of the flare above water and t is the time in seconds.

The ball will hit the ground, when height will be 0 meters, so we will equate $h=0$ to find the time when ball will hit the ground as:

$-16t^2+104t+56=0$

Using quadratic formula, we will get:

$t=\frac{-104\pm\sqrt{104^2-4(-16)(56)}}{2(-16)}$

$t=\frac{-104\pm\sqrt{10816+3584}}{-32}$

$t=\frac{-104\pm\sqrt{14400}}{-32}$

$t=\frac{-104\pm120}{-32}$

$t=\frac{-104+120}{-32}\text{ or }t=\frac{-104-120}{-32}$

$t=\frac{16}{-32}\text{ or }t=\frac{-224}{-32}$

$t=-\frac{1}{2}\text{ or }t=7$

Since time cannot be negative, therefore, it will take 7 seconds for the flare to hit the ground.

7 0

3 years ago

Darnell’s team scored 40 points at the game. Darnell scored 15% of the team’s points. How many points did Darnell score?

Lina20 [59]

Answer: 6 points

Work:
15/100=0.15
40•0.15=6

7 0

2 years ago

A triangle has angle measures of 18° and 57°. What is the measure of the third angle?

Pachacha [2.7K]

Answer:

105°

Step-by-step explanation:

Measure of the third angle

= 180° - 18° - 57° (angle sum of triangle)

= 105°

5 0

1 year ago