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
AlladinOne [14]
3 years ago
6

The display gives the result of performing a quadratic regression on a data set where the inputs are speeds in miles per hour an

d the outputs are the corresponding braking distances in feet. What is the stopping distance for a vehicle traveling at 20 mph?

Mathematics
1 answer:
alina1380 [7]3 years ago
7 0
Y = a x² + b x + c
y = 0.0473809524 · 20² + 2.221428571 · 20 - 0.005952381 = 
= 18.95236 + 44.42875 - 0.05952381 = 63.374978 ≈ 63.4
Answer: C ) 63.4 ft.
You might be interested in
Solve x2 - 8x = 20 by completing the square. Which is the solution set of the equation?
Artyom0805 [142]

Answer:

{-2,10}

Step-by-step explanation:

x^2 - 8x = 20

Take the coefficient of x

-8

Divide by 2

-8/2 =-4

Square it

(-4)^2 =16

Add this to each side

x^2 - 8x+16 = 20+16

x^2 - 8x+16 = 36

The left hand side becomes( x + (-8/2) )^2

(x - 4)^2 = 36

Take the square root of each side

sqrt((x - 4)^2) =±sqrt( 36)

x-4 = ±6

Add 4 to each side

x-4+4 = 4±6

x = 4±6

x = 4+6       x = 4-6

x = 10        x = -2

3 0
3 years ago
If a polynomial function f(x) has roots 6 and square root of 5, what must also be a root of f(x)?
ivolga24 [154]

Answer:

-\sqrt{5}

Step-by-step explanation:

A root with square root or under root is only obtained when we take the square root of both sides. Remember that when we take a square root, there are two possible answers:

  • One answer with positive square root
  • One answer with negative square root

For example, for the equation:

x^{2}=3

If we take the square root of both sides, the answers will be:

x=\sqrt{3} \text{ or } x= -\sqrt{3}

Only getting one solution with square root is not possible. Solutions with square root always occur in pairs.

For given case, the roots are 6 and \sqrt{5}. Therefore, the 3rd root of the polynomial function f(x) had to be -\sqrt{5}

It seems you made error while writing option B, it should be - square root of 5.

4 0
3 years ago
How would you find the volume of this cone?
posledela

Area of cone = 1/3 base × height = 1/3 × 8 × 10 = approximately 26.7 m

Ans= approx. 26.4 m

Happy to help. Please mark as brainliest!

4 0
3 years ago
​What is the slope of a line that passes through the points (5, 6) and (−11, 14)
Mariulka [41]

Answer:

m = -1/2

Step-by-step explanation:

let me know if it helped

(too lazy to write a explanation)

4 0
2 years ago
Simplify, following the order of operations: 5 102 – 3 × (12 – 8)
JulijaS [17]

5 + 10^2 - 3 ( 12 - 8 ) = 93 12 - 8 = 4 then do 3 x 4 which = 12 and then add 5 to 10^2 which = 105 105 - 12 = 93

5 0
3 years ago
Read 2 more answers
Other questions:
  • What are the coordinates of the midpoint of a segment AB , if: A(–3, 4), B( 1, 2)
    13·1 answer
  • Fourth-eight is what percent of 60
    13·2 answers
  • 3 (x-5)?????????????
    5·2 answers
  • A car sells for $5000 and loses 1/10 of its value each year.
    9·1 answer
  • After 85% reduction you purchase a new washing machine for $75. What was the original price of the machine
    6·2 answers
  • Simplify fraction 40/85
    5·1 answer
  • Find the distance travelled in 1 h 40 min at a speed of 90 km/h
    10·1 answer
  • Three different number have a product of 36 and a sum of 11. What are the three numbers
    8·1 answer
  • Pls help me and I’ll give brainliest to u and if u don’t know don’t answer and also don’t waste my points thx
    6·2 answers
  • What is the slope of the line that passes through the points (9, 4)(9,4) and (3, 9)(3,9)? Write your answer in simplest form.
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!