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pickupchik [31]
3 years ago
12

Help me in this question

Mathematics
1 answer:
KATRIN_1 [288]3 years ago
5 0
H = -5t^2 +5t + 10

a) t = 0, h = 10 at time 0 

b) h = (-5t  + 10) ( t  +  1) 

c) put 0 in for the height and set each factor = to 0 and solve each
0 = (-5t + 10) and 0 = (t + 1)
solve each t = 2 and t = -1, so t = 2 sec is your solution

d)  because a parabola is symmetric, the max will be half way between -1 and 2, at t = 1/2

h = -5(1/2)^2 +5(1/2) + 10
h = -5(1/4) + 5/2 +10
h = -5/4 + 5/2 + 10
h = -5/4 + 10/4 + 40/4
h = 45/4

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Solve to find x and y in the diagram.
lesantik [10]

15x = 90

   x = 6


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30 + 12y = 90

12y = 60

  y = 5

Answer: 3rd option

x =6, y = 5

5 0
4 years ago
(y* - 5)(yx + 5)<br> please help
Nina [5.8K]

Answer:

Simplified the expression.

y2x+5y−5yx−25  

I think this is what were were asking, if not please explain better.

Hope this helps :D

plz like & brainly

7 0
3 years ago
What is the height of a cone given it has a volume of 225 cm and a base diameter of<br> 10 cm?
Sphinxa [80]

Answer:

B. 8.6 cm

Step-by-step explanation:

⅓*πr²h = Volume formula of a cone (V)

Volume of cone (V) = 225 cm³

diameter of cone (d) = 10 cm

radius of cone (r) = ½(10) = 5 cm

height (h) = ?

Plug in the values into the equation and solve for h

⅓ × π × 5² × h = 225

⅓ × π × 25 × h = 225

(25π × h)/3 = 225

Multiply both sides by 3

(25π × h)/3 × 3 = 225 × 3

25π × h = 675

Divide both sides by 25π

h = 675/25π

h ≈ 8.6 cm (nearest tenth)

7 0
3 years ago
Find the value of 21 + 4(3/\2 - 5). The two after the three is an exponent.
Yuri [45]
First. distribute and multiply the the 4 to the 3^2 and the -5
so then it becomes 21+ 36 - 20
second. add and subtract that
answer is: 37
8 0
4 years ago
Read 2 more answers
Correct answer will be marked as brainliest
beks73 [17]

Answer:

h=9cm

P=(x+5)cm

b=(x-3)cm

by the Pythagoras theorem,

h^2=p^2+b^2

9^2=(x+5)^2+(x-3)^2

81=x^2+10x+25+x^2-6x+9

81=2x^2+4x+34

8 0
3 years ago
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