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kicyunya [14]
3 years ago
13

A total of 25 LJHS students and adults attended the state playoffs. It was $8 for an adult and $5 for a student. If the total wa

s $155, how many students and adults attended?
Mathematics
1 answer:
FrozenT [24]3 years ago
6 0

Answer:

15 students and 10 adults

Step-by-step explanation:

x + y = 25       Total number of attendants

5x + 8y = 155     Total amount earned

5(15) + 8(10) = 155     Pick numbers to sub in for x and y until you find ones that work

15 students (x) and 10 adults (y) attended the game.

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3 years ago
Which is an equation of the line through (-1, -4) and parallel to the line 3x + 7 = 5
ehidna [41]
Your original equation has no y-variable. It results in x = -2/3 when you solve for x which is a vertical line. Thus, if you want a line parallel to this that goes through point (- 1, - 4), you just set x equal to the x-value in that ordered pair.

Your parallel line is x = - 1. 
3 0
3 years ago
A rocket carrying fireworks is launched from a hill 60 feet above a lake. The rocket will fall into the lake after exploding at
castortr0y [4]

Answer:

<h3>A) 204m</h3><h3>B) 188m</h3>

Step-by-step explanation:

Given the rocket's height above the surface of the lake given by the function h(t) = -16t^2 + 96t + 60

The velocity of the rocket at its maximum height is zero

v = dh/dt = -32t + 96t

At the maximum height, v  = 0

0 = -32t + 96t

32t = 96

t = 96/32

t = 3secs

Substitute t = 3 into the modeled function to get the maximum height

h(3) = -16(3)^2 + 96(3) + 60

h(3) = -16(9)+ 288 + 60

h(3) = -144+ 288 + 60

h(3) = 144 + 60

h(3) = 204

Hence the maximum height reached by the rocket is 204m

Get the height after 2 secs

h(t) = -16t^2 + 96t + 60

when t = 2

h(2) = -16(2)^2 + 96(2) + 60

h(2) = -64+ 192+ 60

h(2) = -4 + 192

h(2) = 188m

Hence the height of the rocket after 2 secs is 188m

3 0
3 years ago
Jana finished 1/4 of her homework at school and 2/3 of it before dinner how much of her homework has she finished so far
seropon [69]

Answer:

11/12

Step-by-step explanation:

1/4+2/3

1/4×3/3+2/3×4/4

3/12+8/12

8 0
3 years ago
- A phone call costs $0,58 for the first 3 minutes and $0.15
Goshia [24]
.58 + .15x = 4.78
28 minutes
8 0
4 years ago
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