Answer:
4.95 and 2.25
Step-by-step explanation:
x+y=7.2
x-y=2.7
Add equations
x+y + x-y= (2x-y+y)=2x
7.2+2.7=9.9
Therefore 2x=9.9 x=9.9/2=4.95
x=4.95
x+y=7.2
4.95+y=7.2
y=7.2-4.95=2.25
y=2.25
The system of linear equations that relates x and y:
x= 15 + y
5 x = 2 y+ 525
We will solve this system using substitution method:
5(15 + y)=2 y + 525
75 + 5 y = 2 y + 525
5 y - 2 y = 525 - 75
3 y = 450, y = 450 : 3 y = 150
x = 15 + y x = 15 + 150 x = 165
Answer: Aaron´s height is 165 cm and Peter´s height is 150 cm.
Substitute the values of the size of the 5 batches to the
model.
For example
@x = 20
f(20) = 2*20 – 23 = 17
f(25) = 2*25 – 23 = 27
f(26) =29
f(27) = 31
f(34) = 45
Therefore the answer is the first choice (17, 27, 29, 31,
42)
The studio Cost per day as a function of the number of hours used by the sound technician and the inequality which models the data is :
- T(n) = 225 + 80n
- $205 ≤ (225 + 80n) ≤ $545
<u>Total studio cost</u> :
(studio fee per day + sound technician fee per hour)
If the Number of hours spent in studio = n
Total studio cost, T(n) = 225 + 80n
Amount at hand = $205
Additional earning from pre-orders = $340
This means that minimum amount Jenna can afford = amount at hand = $205
The maximum amount Jenna can afford = (Amount at hand + additional earning) = ($205 + $340 = $545)
Therefore in other to afford studio cost :
Minimum ≤ Studio cost ≤ maximum amount
$205 ≤ (225 + 80n) ≤ $545
Learn more :brainly.com/question/15748955
