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
VLD [36.1K]
3 years ago
5

Jessica is asked to write a quadratic equation to represent a function that goes through the point (8, –11) and has a vertex at

(6, –3). Her work is shown below. –11 = a(8 – 6)2 – 3 –11 = a(2)2 – 3 –11 = 4a – 3 –8 = 4a a = –2 After Jessica gets stuck, she asks Sally to help her finish the problem. Sally states that Jessica needs to write the quadratic equation using the value she found for a, –2, and the point (8, –11). Evaluate Jessica’s work and Sally’s review to determine which statement is true.
1. Jessica did not solve for the correct value of a, but Sally’s review is correct.
2. Jessica did not solve for the correct value of a, and Sally’s review is incorrect.
3. Jessica solved for the correct value of a, but Sally’s review was incorrect.
4. Both Jessica’s work and Sally’s review are correct. The equation is f(x) = –2(x – 8)2 – 11.
Mathematics
2 answers:
Lostsunrise [7]3 years ago
8 0

Answer:

Jessica’s work is correct and Sally’s review is incorrect

Step-by-step explanation:

I'm just assume it's a vertical parabola we know that The equation of a vertical parabola in vertex for is equal to where (h,k) is the vertex In this problem we have point substitute To find the equation using the value of a and the vertex point so therefore

Jessica’s work is correct and Sally’s review is incorrect

vesna_86 [32]3 years ago
5 0

the answer is c. I just did the review

You might be interested in
Joshua has a bag of marbles. In the bag are 5 white marbles, 3 blue marbles, and 7 green marbles. Peter randomly draws one marbl
Step2247 [10]

Answer:

1 / 5

Step-by-step explanation:

Given that:

Number of white marbles = 5

Number of blue marbles = 3

Number of green marbles = 7

Required is the approximate probability of drawing 2 green marbles, Note that drawing is done without replacement :

Probability = required outcome / Total possible outcomes

Total possible outcomes = sum of all marbles = (5 + 3 + 7) = 15 marbles

First draw:

P(Green) = 7 / 15

Second draw:

Required outcome = 7 - 1 = 6

Possible outcomes = 15 - 1 = 14

P(green) = 6 / 14

Probability of drawing out two green marbles :

(7/15 * 6/14) = 42 / 210 = 1 / 5

6 0
3 years ago
Which inequalities are true?
valentina_108 [34]
B is correct as -4 is smaller than 7
d is correct as -30 is smaller than -18
e is correct as -3 is bigger than -8
6 0
3 years ago
"Rebecca walks 100 feet in a straight line. She then turns 20 degrees to her left and walks another 100 feet, and then turns 20
iragen [17]

Answer:

1,800 ft

Step-by-step explanation:

Rebecca will walk in the pattern of a regular polygon with 'n' sides and internal angles of 160 degrees (180 at a straight line - 20 degrees from each turn).

The equation that describes the internal angle of a regular polygon is:

A = \frac{(n-2)*180}{n}

For A = 160 degrees:

160n=(n-2)*180\\(180-160)n=360\\n=18\ sides

If each side is 100 ft long, the total distance that Rebecca has walked is:

d = 18*100\\d=1,800\ ft

She walked 1,800 ft.

5 0
3 years ago
Please help on my hw, I'm not feeling good, and can't concentrate
sergiy2304 [10]

Answer:

Solution given:

f(x)=x²

g(x)=x+5

h(x)=4x-6

now

23:

(fog)(x)=f(g(x))=f(x+5)=(x+5)²=x²+10x+25

24:

(gof)(x)=g(f(x))=g(x²)=x²+5

25:

(foh)(x)=f(h(x))=f(4x-6)=(4x-6)²=16x²-48x+36

26:

(hof)(x)=h(f(x))=h(x²)=4x²-6

27;

(goh)(x)=g(h(x))=g(4x-6)=4x-6+5=4x-1

28:

(hog)(x)=h(g(x))=h(x+5)=4(x+5)-6=4x+20-6=4x-14

5 0
3 years ago
PLEASE HELP WILL MARK BRAINILIEST!!!
muminat

Answer:

y=-50x-20

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • Blank as 8 hundreds is 8 thousands?
    7·2 answers
  • The scatter plot shows the relationship between the number of car accidents in a month and the number of drivers attending a pro
    13·1 answer
  • What is 80,000,000 +4,000,000+100+8 in standard form
    9·2 answers
  • Questions and answers are below aswell enjoy your day :)
    15·1 answer
  • I need some help on these two questions.
    13·1 answer
  • What is y= -3x + 4 what does y equal
    14·1 answer
  • Is (3) (-3)(-3)(-3)(-3) a negative or a positive? please helpp
    13·2 answers
  • Which expression is equivalent ​
    6·1 answer
  • Will be marked the brainliest if correct
    12·1 answer
  • Graph the image of this figure after a dilation with a scale factor of 12centered at the point (−3, 0)
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!