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
Vera_Pavlovna [14]
2 years ago
8

Help me with my test

Mathematics
2 answers:
zavuch27 [327]2 years ago
5 0

Answer:

B. -8

Step-by-step explanation:

first find k: plug 3 and -2 into the function

3=2(-2)^2-5(-2)+k\\3=2(4)+10+k\\3=18+k\\k=-15

then plug -1 into 2x^2-5x-15

2(-1)^2-5(-1)-15\\= 2(1)+5-15\\=7-15\\=-8

h(-1) = -8

geniusboy [140]2 years ago
4 0

- 8.

Step-by-step explanation:

h(x) = 2 {x}^{2}  - 5x + k

If h(-2) = 3.

Then, h(-1) =

h( - 1) = 2 {( - 1)}^{2}  - 5( - 1) + k

h( - 1) = 2 + 5 + k

h( - 1) = 7 + k

- 1 - 7 = k

- 8 = k

You might be interested in
For sketching solutions for inequalities should there be a solid line or a dotted line at `x-y=5`?
Tpy6a [65]
Jdjjckdifoffcncjdididid
4 0
3 years ago
Does 2.5, 6, 6.5 form a right triangle
yawa3891 [41]
Yes I think it’s s right triangle
5 0
3 years ago
Read 2 more answers
What would be the least common denominator of 5/6 and 2/9?
AURORKA [14]

Answer:

the least common denominator is 54 although there are some that are higher ones

Step-by-step explanation:

5 0
3 years ago
Can some help me with my homework it’s number 5. 6. 7. 8. And 9.
BaLLatris [955]

Answers:

5. 296

6. 479

7. 801

8. 920

9. $281

Step-by-step explanation:

For 5-8, you add the 2 numbers. Line up the numbers by their place value.

For 9, it says she starts with $233. She worked for 6 hours today. She makes $8 for every hour. First, you have to find how much she made today. 6 hrs times $8 for every hr is $48. In total, she has $281 because we added the amount she starts with, and the amount she earned today.

4 0
3 years ago
Read 2 more answers
Find the axis of symmetry for this parabola: <br><br> y=-5x^2-10x-13
Dmitry [639]

Answer:

x=1

Step-by-step explanation:

1. Complete the square on the right side of the equation.

5 ( x − 1 )2 − 18

2. Use the vertex form,  y = a ( x − h ) 2 + k , to determine the values of  a ,  h , and  k . a= 5 h = 1 k = − 18

3. Since the value of  a  is positive, the parabola opens up.

Opens Up

4. Find the vertex  ( h , k ) . ( 1 , − 18 )

5. Find  p , the distance from the vertex to the focus.

1 /20

6. Find the focus.

7. ( 1 , − 359/ 20 )

8. Find the axis of symmetry by finding the line that passes through the vertex and the focus.

ANSWER: x = 1

6 0
3 years ago
Other questions:
  • Which of the following describes the “p/2” in the expression above?
    7·1 answer
  • Can someone please tell me this answer
    8·2 answers
  • The hypotenuse of a 45°-45°-90° triangle measures 7 StartRoot 2 EndRoot units.
    7·2 answers
  • What is the factor of 40,24,16
    11·1 answer
  • Please help ! Will mark brainliest!
    15·1 answer
  • Given right triangle ABC with altitude BD drawn to hypotenuse AC. If AC =16 and DC=5 what is the length of BC in the simplest ra
    14·1 answer
  • The distance between two cities on a map is 10 in. The actual distance between the cities is 135. What is the scale on the map?
    5·1 answer
  • Pls, help due in 10 mins! Pls, answer both questions!
    13·1 answer
  • Whats a integer ,can someone answer this a short explanation ?
    12·2 answers
  • A square room has an area of 14,400 square
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!