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Korvikt [17]
3 years ago
10

14) The height, h metres, of a ball projected directly upwards from the ground can be modelled by h = 56t - 71, where t is the t

ime in seconds after it leaves the ground. a) Find the height of the ball 3.5 seconds after it leaves the ground. b) At what time will the ball strike the ground again? c) When will the ball be 49 m above the ground? Briefly explain why there are two possible answers.​
Mathematics
1 answer:
Agata [3.3K]3 years ago
6 0
Okay the height would be nice if it would have to come
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(-4x-2)+1/2(12x-22) simplify
Ierofanga [76]

Answer:

2x - 13

Step-by-step explanation:

Step  1  :

           1

Simplify   —

           2

Equation at the end of step  1  :

               1

 (-4x - 2) +  (— • (12x - 22))

               2

Step  2  : Pulling out like terms :

3.1     Pull out like factors :

  12x - 22  =   2 • (6x - 11)  

Step  3  :

Pulling out like terms :

3.1     Pull out like factors :

  12x - 22  =   2 • (6x - 11)  

Equation at the end of step  3  :

 (-4x - 2) +  (6x - 11)

6 0
3 years ago
A gas grill originally priced at 399 is on sale for 30% off
DanielleElmas [232]

Answer:

Step-by-step explanation:

a = -32

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7 0
3 years ago
Ebony earned scores of 72 70, 81, 99, and 88 on five math tests. Determine her
Minchanka [31]

Let it be x

\boxed{\sf Average=\dfrac{Sum\:of\:terms}{No\:of\:terms}}

\\ \sf\longmapsto \dfrac{72+70+81+99+88+x}{6}=83

\\ \sf\longmapsto \dfrac{410+x}{6}=83

\\ \sf\longmapsto 410+x=498

\\ \sf\longmapsto x=498-410

\\ \sf\longmapsto x=88

6 0
3 years ago
A circle has a radius of 7 cm. Workout the area of the circle. Give your answer correct to three significant figures.
anastassius [24]

Answer:

πr²=22/7×49

=22×7

=154

hope it helps

Mark me brainliest

5 0
3 years ago
What is x^2 + y^2 - 4x + 12y -20= 0 factored
andrew11 [14]
<span>Simplifying
4x2 + 8xy + 4y2

Reorder the terms:
8xy + 4x2 + 4y2

Factor out the Greatest Common Factor (GCF), '4'.
4(2xy + x2 + y2)
 
Factor a trinomial.
4((x + y)(x + y))

Final result:
4(x + y)(x + y)</span>
4 0
3 years ago
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