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
cestrela7 [59]
3 years ago
12

If y varies directly with x and y=30 when x=-10, find the value of x when y=4

Mathematics
1 answer:
mel-nik [20]3 years ago
4 0
If y∞x  then y=kx where k is constant to find k 
 k=y/x then   substitute the values
k=30/-10=-3 to find x when y is 4
x=y/k=4/-3=-4/3   option A
You might be interested in
What is the scale factor of the dilation?
Anvisha [2.4K]

Answer:

divide by 2

Step-by-step explanation:

to go to 12 to 6 , you will have to divide by 2

12/2 = 6

12 and 6 are on the same side in both triangles , that is why I used those two numbers to figure out the scale factor

7 0
3 years ago
PLEASE HELP<br> ILL GIVE BRAINLIEST
Nadusha1986 [10]

Answer:

f(7x−1)=63x−16

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Whats 9 + 10 fr fr ong fr on fr fr
Fed [463]

Answer:

19.

21 sometimes though.

5 0
2 years ago
Read 2 more answers
A cuboid has side lengths 3cm, 4cm and 7cm. A cylinder with a height double that of the longest side of the cuboid has the same
mart [117]

Step-by-step explanation:

Longest side of cuboid: 7cm

Height of cylinder:

2 × 7 = 14 cm

Volume of cuboid:

7x3x4=84cm^3

Volume of cylinder:

84=14\pi r^2 \\r=\sqrt{\frac{6}{\pi} }  \ \ \  cm\\r=1.38 \ cm\\

Surface area of the cylinder:

\pi r^2 + 2 \pi r h

6+2\pi (\sqrt{\frac{6}{\pi} } ) (14)

=128 cm^2

4 0
3 years ago
alex wants to buy the same number of stamps and envelopes dancer sold in packs of 14 and envelopes are sold and packs of 10 what
lianna [129]
5 packs of stamps and 7 packs of envelopes. There will be a total of 70 envelopes and stamps.
6 0
3 years ago
Other questions:
  • What is the answer to <br> (p-q)(2)=
    12·1 answer
  • Rita and Tina each make $11 an hour working as cashiers at a supermarket. Last week, Rita worked r hours while Tina worked t hou
    15·1 answer
  • WILL MARK BRAINIEST
    11·2 answers
  • 30 points for anyone who can help me with the correct answer!
    12·1 answer
  • PQRS is a rectangle with a length of 10 inches and a width of 4 inches. What is the measurement of angle A, the angle formed by
    6·2 answers
  • What is the next number in the pattern <br> 2,4,8,16,32....
    8·2 answers
  • Use the distributive property to rewrite the expression in factored form. <br> 15g−40
    9·2 answers
  • Triangle ACB with coordinates A(0,0), C(2,0), and B(2,4) is similar to triangle BED. If vertex D has coordinates (6,12), what ar
    8·2 answers
  • PLEASE HELP SUPER EASYYYY
    9·1 answer
  • Please answer, fifteen pts!<br><br> 8x -4 &lt; -36.<br><br> Please explain/show work!
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!