1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lilavasa [31]
3 years ago
13

Someone please help, 100 points.

Mathematics
1 answer:
Over [174]3 years ago
5 0
Part 1
Let:
y be the total cost
x be the number of tickets
a be fair admission

Since the fair charges $1.25 per ticket, the equation of the line would look like:

y = 1.25x + a

Since Johnny spent $43.75 and bought 25 tickets, we find a by replacing y with 43.75 and x with 25:

43.75 = 1.25×25 + a

Now solve for a

43.75 = 31.25 + a
43.75 - 31.25 = a
a = 12.50

Going back to the first equation:

y = 1.25x + 12.50


Part 2:
a) Let (9,8) be (x1,y1) and (4,-12) be (x2,y2)
The formula for slope is:
m =  \frac{y2 - y1}{x2 - x1}  \\ m =  \frac{ - 12 - 8}{4 - 9}  \\ m =  \frac{ - 20}{ - 5}  \\ m = 4
b) For the point-slope equation, I'll use (9,8)
Using the formula:
y - y1 = m(x - x1) \\ y - 8 = 4(x - 9)
c) For the slope-intercept form, we solve for y in the point-slope formula:
y - 8 = 4(x - 9) \\ y = 4x - 36 + 8 \\ y = 4x - 28
You might be interested in
The perimeter of a rectangular concrete patio is 100 meters. it is 30 meters long. how wide is it?
34kurt
Perimeter is 2l+2w
100 =2(30) + 2w
100 =60 + 2w
-60 -60
40 = 2w

w=20 meters.
6 0
3 years ago
Alan just got a Fall job. The equation P = 12.50h represents the salary P (in dollars) he will earn when he works h hours. How m
balandron [24]

Given:

Alan salary P (in dollars) when he works h hours is represented by the equation

P=12.50h

To find:

The earning per hour.

Solution:

We have,

P=12.50h

Here, P is total salary and h is number of hours he works.

\text{Earning per hour}= \dfrac{\text{Total salary}}{\text{Number of hours}}

\text{Earning per hour}= \dfrac{12.50h}{h}

\text{Earning per hour}=12.50

Therefore, the earning per hour is $12.50.

8 0
3 years ago
NEEEED help with 2 and 4?!
muminat

Answer:

ex 2

is d 66 and ex 4 don't know

8 0
2 years ago
Can anybody help me on this<br> 16<br> 16π<br> 16π - 16<br> 16 - 16π<br> are the answer choices
kvasek [131]
The answer is 16 pi - 16. The area of each triangle is 8, so both triangles are 16. The area of the circle is pi times the radius squared, 16 pi.
3 0
3 years ago
Read 2 more answers
78.75 is what percent of 225?
viva [34]

Answer:

35%

Step-by-step explanation:

1. Multiply 78.75 by 100

78.75* 100 = 7875

2. Divide this by 225

7875/225 = 35

3. Make this number a precent 35%

5 0
3 years ago
Other questions:
  • The tree in your friend's yard casts a shadow that is 27 feet long. Your friend is 5 feet tall and casts a shadow that is 4.5 fe
    5·2 answers
  • Jillian is selling products to customers.If she wants to make 950$ with 50 bucks a day,how much money should she charge each cus
    11·2 answers
  • A trail runner gets a new map of her favorite mountain.
    10·1 answer
  • Which juice container is larger 2 liters or 1 gallon
    12·2 answers
  • 1. 9 <br> 2. 6 <br> 3. 3<br> 4. 81<br> Help plz giving out brianlest and god bless you
    10·2 answers
  • Lamar is considering two loans.
    13·2 answers
  • Question from my math test.
    14·1 answer
  • Giving brainlist! It’s an homework It’s due is today aaa
    13·1 answer
  • 3x−4y=21 <br> what does the x and y mean?
    7·1 answer
  • In the table, pattern A uses the rule add five pattern B uses the rule at 10 which statement is true every term in pattern b is
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!