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Amiraneli [1.4K]
3 years ago
5

Can someone please answer these 4 questions they don’t look hard- but I just need to understand please!! (If you can provide the

answer please!!!!!) -50 points please answer truthfully I’ll give brainliest!

Mathematics
2 answers:
romanna [79]3 years ago
8 0

Answer:

the ans are

Step-by-step explanation:

1.= 1.25m/s

2.=30cm/s

3.=1260m

4.=50sec

not sure of 3 no

maw [93]3 years ago
8 0

Answer:

(1) His speed would be 1.25 seconds when you divide 40(speed) by 50 (distance).

(2) His average speed would be 30 seconds when I would divide the total distance, by the elapsed time.

(3) 1,260, when i multiplied 420 by 3.

(4) It will take him 50 seconds, and I got this by dividing 300 with 6.

Note:

Pls don't forget to brainliest :) Thank you!

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What is the equation of the parabola with a directrix at y = 4 and focus (0, -4).
Svet_ta [14]
Given that the directrix is at y = 4 and the focus is at (0, -4), then the vertex is at (h, k) = (0, 0).
p is the distance between the vertex and the focus and between the vertex and the directrix = 4 and since the focus is below the directrix, p is negative, i.e. p = -4
Equation of a parabola is given by (x - h)^2 = 4p(y - k)
Therefore, the required equation is (x - 0)^2 = 4(-4)(y - 0)
x^2 = -16y
y = -1/16 x^2
3 0
3 years ago
Within 11 years, the age of Peter will be half the square of the age he was 13 years ago. Calculate the current age of Peter. Re
OLga [1]

Answer:

21

ctto JBarnum

Step-by-step explanation:

P+11=(1/2)(P-13)^2

P+11=(1/2)(P^2-26p+169)

2(P+11)=(1/2)(2)(P^2-26p+169)

2P+22=P^2-26p+169

0=P^2-28p+147      ( -7 and -21)

(P-7)(P-21)=0

P=7,21                     (cant be 7 as 13 years from 7 is negative so peter is 21)

checking:

21+11=32

32=(1/2)(21-13)^2

32=(1/2)(8)^2

32=(1/2)64

32=32

correct

4 0
3 years ago
A person is purchasing a new golf club bag. The compartment for the golf balls is approximately the shape of a rectangular prism
Lerok [7]

Answer:

The answer to your question is: ≈ 178 balls

Step-by-step explanation:

Data

rectangular prism = 8 in x 11 in x 5 in

golf balls = 1.68 in diameter

Formula

Volume rectangular prism = l x w x h = 8 x 11 x 5 = 440 in³

Volume of ball = (4/3) πr³ = (4/3) (3.1416) (0.84)³ = 2.48 in³

# of balls inside the compartment = volume rectangular prism / volume ball

# of balls = 440 / 2.48

               = 177.4 ≈ 178 balls

8 0
3 years ago
Boxes that are 12 inches tall are being stacked next toboxes that are 18 inches tall. What is the shortest height in which the t
ycow [4]
36 inches because 12,24,36 and 18,36, 36=36
6 0
3 years ago
How long should an escalator be if it is to make an angle 30 with the floor and
Charra [1.4K]

Answer:

it should be 23 feet long

Step-by-step explanation:

7 0
2 years ago
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