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
olchik [2.2K]
3 years ago
8

Help would really be appreciated with this one!

Mathematics
1 answer:
Marta_Voda [28]3 years ago
4 0
Point slope is nicer
y-y1=m(x-x1)
goes through the point (x1,y1) and has a slope of m

slope itnercept
y=mx+b
m=slope
b=y intercept




first find slope
slope between 2 points (x1,y1) and (x2,y2) is (y2-y1)/(x2-x1)
given
(7,82) and (4,18)
slope=(18-82)/(4-7)=-64/-3=64/3


point slope
point is (7,82) or you can do (4,18)
I'll do both
y-82=(64/3)(x-7) or
y-18=(64/3)(x-4)
those both work



slope intercept
slope is 64/3
y=64/3x+b
find b
input a point
(4,18)
18=64/3(4)+b
18=256/3+b
minus 256/3 from both sides
note: 18=54/3
-202/3=b
y=64/3x-202/3 is equation in slpe intercept
You might be interested in
Which point-slope equation represents a line that passes through (3,-2) with a slope of -4/5?
Viefleur [7K]

Answer:

y + 2 = -4/5 (x - 3)

Step-by-step explanation:

y - y1 = m (x - x1). Put in your points for y1 and x1, and always remember to flip your signs.

unfortunately, I don't know why that isn't one of your answers, so sticking with the positive 2 I would choose y+2=- (- 3) if I were you. Looks like the -4/5 disappeared somehow?

Hope this helps

8 0
2 years ago
Which expression is equivalent to 4(5j + 7)?
frozen [14]

Answer: 4(5j+7) = 20j+28

Step-by-step explanation:

5 0
3 years ago
Fiona wrote out the description of each step for her multiplication of the binomial and trinomial (2x – 3)(5x2 – 2x + 7).
Arte-miy333 [17]
I just took the test and the answer is step 2.
5 0
3 years ago
Read 2 more answers
A car braked with a constant deceleration of 64 ft/s2, producing skid marks measuring 50 ft before coming to a stop. How fast wa
vitfil [10]

Answer:

The initial speed of the car was 80 ft/s.

Step-by-step explanation:

The deceleration is the rate at which the car speed decreases. In this case the speed of the car goes all the way down to 0 ft/s and in order to do that it travelled 50 ft.  So we will call the initial speed at which the car started to brake "v_0" and use Torricelli's equation to find it. The equation is given by:

v^2 = (v_0)^2 + 2*a*S

Where v is the final speed, v_0 is the initial speed, a is the rate of acceleration and S is the space travelled. Using the values that the problem gave to us we have:

0^2 = (v_0)^2 - 2*64*50

0 = (v_0)^2 - 6400

(v_0)^2 = 6400

v_0 = sqrt(6400) = 80 ft/s

Notice that in this case "a" was negative, since the car was decelerating instead of accelerating.

The initial speed of the car was 80 ft/s.

4 0
3 years ago
Read 2 more answers
Which of the following equations could be used to solve for x in the triangle shown?
erastovalidia [21]
Sin ( theta ) = opposite / hypotenuse
sin ( 37° ) = 13 / x
5 0
3 years ago
Read 2 more answers
Other questions:
  • Graph the linear equation. Find three
    15·1 answer
  • What is the answer for r+11+8r=29
    12·1 answer
  • Equation of the line that passes through (8,-7) (-6,-7)
    15·2 answers
  • -1/3(n + 15) = -2<br><br> Explain how to solve it.
    9·2 answers
  • Explain how to multiply two numbers with different signs.
    13·1 answer
  • Mr. Ornelas needed to travel 400 miles to reach Chicago from his
    5·1 answer
  • Help me answer this please!!!
    9·2 answers
  • A total of 100 students were surveyed
    11·1 answer
  • 4x - 6 = 30 can you solve it
    8·1 answer
  • Use a factor tree to find the GCF of 32 and 80.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!