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
sergij07 [2.7K]
2 years ago
13

If y is directly proportional to x^2 and y=18 and x=3,

Mathematics
1 answer:
Svetach [21]2 years ago
7 0

Answer:

Step-by-step explanation:

(i)

y=k*x^2\\\\if\ x=3, y=18 ==> 18=k*9\ ==> k=2\\\\Equation\ is:\ y=2x^2\\

(ii)

x=5 ==> y=2*5²=50

(iii)

32=2*x^2\\x^2=16\\x^2-4^2=0\\(x-4)(x+4)=0\\\\x=4\ or\ x=-4\\

You might be interested in
Can someone plz help me with this one problem!!
NNADVOKAT [17]

Answer:

No

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
What is the answer to a,b, and c? Thanks!
Katarina [22]

The area of a triangle can be calculated as half the product of base length and height. We want the area to be no greater than 10 in².

a) (1/2)(4)(2x-3) ≤ 10

b) 4x -6 ≤ 10 . . . . . simplify

... 4x ≤ 16 . . . . . . . .add 6

... x ≤ 4 . . . . . . . . . divide by the coefficient of x

c) The maximum value of (2x -3) in is (2·4 -3) in = 5 in.

The triangle should be no more than 5 in high to have an area less than 10 in².

6 0
3 years ago
The Sweet Treat sells 40 lbs of gummy bears and 30 caramel apples every day. At this rate, how many lbs of gummy bears will be s
Sliva [168]

Answer:

8 pounds of gummy bears.

Step-by-step explanation:

To find this answer I did:

40/30 = 4/3

Then,

4/3 x 6 = 24/3

This simplified is 8.

To check:

8/6 x 5 = 40/30

3 0
3 years ago
50 points for whoever answers the right answer
Olin [163]

Answer:

128

Step-by-step explanation:

Supplementary means they sum to 180, and it's also a straight line. 180-49 = 131. 131-3 = 128, or x.

6 0
2 years ago
Read 2 more answers
Write real world problem that involves a positive and a negative value.then graph the values used in the problem on a number lin
Reil [10]
I got a $5000 scholarship. I spent $300 on a Nintendo Switch. How much money do I have now?
8 0
3 years ago
Other questions:
  • Lucy bought 9 yards of ribbon on a spool. She cut the ribbon into 1/2 yard pieces, which equation represents the number of piece
    6·1 answer
  • In the mall, 1/15 of the stores sell shoes. there are 180 stores in the mall. how many of the stores sell shoes
    5·1 answer
  • Bobs bill at a dinner restaurant is 40.90 if he wants to leave a 15% tip
    7·1 answer
  • Determine if the solution set for the system of equations shown is the empty set, contains one point or is infinite.
    9·1 answer
  • Determine how many, what type, and find the roots for f(x) = x3 - 4x2 – 16x + 64. <br> SHOW WORK!
    12·1 answer
  • Marvin collects trading cards.He stores them in boxes that hold 235 cards each.If Marvin has 4 boxes full of cards, how many car
    9·2 answers
  • Andrea earns $32.25 a day. After 9 days, about how much will she have earned?
    13·2 answers
  • A beach ball has a radius of 12 in.. How much air will the beach ball hold? (leave your answer in terms of 7)
    7·1 answer
  • There are 8 footballs.
    12·2 answers
  • BRAINLIEST <br> Please answer these
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!