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
Maslowich
3 years ago
9

If x varies directly as y, find x when y=8. x=11 when y=-3

Mathematics
1 answer:
andriy [413]3 years ago
8 0

Answer:

x=-\frac{88}{3}

Step-by-step explanation:

When a quantity "A" varies DIRECTLY with another quantity "B", we can write the proportionality equation as:

A = kB

Where k is the proportionality constant (to be found)

In this problem, it is given x varies DIRECTLY with y, so we can write:

x = ky

Also, given, x = 11, y = -3, so we plug these into the equation and first find k:

x = ky

11 = k(-3)

k = -11/3

Now, we need to find x when y = 8, so we substitute and find x:

x=ky\\x=(-\frac{11}{3})(8)\\x=-\frac{88}{3}

You might be interested in
Which descriptions can describe more than one triangle? check all that apply
babunello [35]

Answer:

Angle measurements of 35°, 35°, and 110°

Angle measurements of 40°, 60°, and 80°

Step-by-step explanation:

If you specify only the three angles, you can have an infinite number of similar triangles of different sizes.

A is wrong. There can be only one triangle in which all three side lengths are specified.

C is wrong. The angles do not add up to 180°.

5 0
3 years ago
Read 2 more answers
Every day a factory produces 5000 light bulbs, of which 2500 are type 1 and 2500 are type 2. if a sample of 40 light bulbs is se
alisha [4.7K]
<span>The solution: = 40, p = q = 0.5 P[x] = nCx *p^x *q^(n-x) when p = q = 0.5, the formula simplifies to P[x] = nCx/2^n = 40Cx/2^40 at least 18 of each type means 18 to 22 of (say) type I P(18 <= X <= 22) = 0.5704095 <------- qb mean = 40*0.5 = 20 SD = sqrt(npq) = sqrt(40*0.5*0.5) = 3.1623 z1= (18-20)/3.1623 = -0.63 , z2 = (22-20)/3.1623 = 0.63 P(-0.63 < z < 0.63) = 0.4713 <-------</span>
5 0
3 years ago
Irene can snap 48 times in 8 minutes at a constant rate. How many
vitfil [10]
6 snaps a minute if you multiply 9 x 6 is 54
8 0
3 years ago
Read 2 more answers
How do I write the sum of 6x and 2x is at least 39 ?
tatiyna
<h2>Put x = \dfrac{39}{8} I write the sum of 6x and 2x is at least 39 .</h2>

Step-by-step explanation:

We have,,

6x and 2x

To find, the value of x = ?

According to question,

The sum of 6x and 2x is at least 39

∴ 6x + 2x = 39

⇒ 8x = 39

⇒  x = \dfrac{39}{8}

∴ The value of x = \dfrac{39}{8}

Thus, put x = \dfrac{39}{8} I write the sum of 6x and 2x is at least 39 .

5 0
3 years ago
What is 1 + 1 i need help.
Anastasy [175]

Answer:

2

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • What is 2/3 x 4/5 x 3/4
    12·1 answer
  • What measurement do you need to find volume of cylinder, cone, and sphere
    12·1 answer
  • ??math question?? graph
    12·2 answers
  • Find the interquartile range of the data. <br><br> A.5<br><br> B.8<br><br> C.13<br><br> D.17
    15·2 answers
  • Exercise 3.9.101: Find a particular solution to x 0 = 5x + 4y+ t, y 0 = x + 8y−t, a) using integrating factor method, b) using e
    5·1 answer
  • From 76 to 95 what is the percent increase
    15·2 answers
  • Solve for x.<br> Use the completing the square method.<br> x2 + 10x = 6
    7·1 answer
  • * This is the correct answer, I have taken the test and am posting the answers in hopes of helping other people :] *
    8·1 answer
  • What is the solution to the equation? √x+3=12
    7·2 answers
  • PLZ help with answer! See attachment:
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!