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
IgorC [24]
3 years ago
12

If the value of y varies directly with x and y= -1 when x=3, find y if x=9

Mathematics
1 answer:
Zolol [24]3 years ago
4 0

y = - 3

Since y varies directly as x then

y = kx ← ( k is the constant of variation )

to find k use y = - 1 when x = 3

k = \frac{y}{x} = \frac{-1}{3} = - \frac{1}{3}

hence y = - \frac{1}{3} x

when x = 9, then

y = - \frac{1}{3} × 9 = - 3


You might be interested in
A recipe calls for 125 cups of sugar. If jasmine wants to make 13 of the recipe, how many cups of sugar will she need?
iragen [17]

Answer: 1625

Step-by-step explanation: So if you want to make 13 of one recipe it said that in 1 recipe there's 125 cups of sugar so you need to multiply 123 by 13 so do this 125 x 13 = 1625 and then there, you have your answer 1,625 cups of sugar for 13 things of the recipe.

7 0
3 years ago
11. Which is a set of similar fractions?
Juliette [100K]

Answer:

D. 2/10, 3/10, 4/10

Step-by-step explanation:

D. is the correct answer because the fractions have a common denominator of 10, whereas the other answer choices do no.

D. has similar fractions

Good luck to you!

7 0
3 years ago
Y is directly proportional to the square root of (x+2). when x =7 y=2. find y when x =98
denis23 [38]

Answer:

98/7=14

14*2=28

y=28

Step-by-step explanation:

8 0
3 years ago
Which correctly lists the three processes that are affected by freeze and thaw cycles? creep, landslide, and deposition depositi
svetlana [45]

Answer:

slump, weathering, and creep

Step-by-step explanation:

edge2020

Freezing and thawing cycle in geology is the process in which water gets in between soil space or rock cracks, freeze in a cold season, and then melt in a warmer season, exerting a force on the soil or rock around it. This force is due to the expansion and contraction of water when it changes from ice to liquid water.

The three geological processes slump, weathering and creep all depend on thawing and freezing cycle among other factors.

<u>Slump</u>: Slump is a type of geological process that occurs when coherent mass of loosely consolidated materials or a rock layer moves a short distance down a slope. The movement of a slump is characterized by sliding along a concave-upward or planar surface. <em>Causes includes earthquake shocks, thorough wetting, freezing and thawing, undercutting, and loading of a slope. </em>

<u>Weathering</u>: This is a geological process that results in the gradual disintegration of rocks into smaller sizes. It is one of the most important soil formation process, and is different from erosion by the degree of movement of the soil formed. Weathering does not move the soil from its origin. <em>Thawing and freezing cycle plays a major role in weathering by helping crack up the rocks and by also tearing the rock apart. plays a major role. </em>

<u>Creep</u>: This is the slow, often imperceptible downslope movement of soil or other debris. The effects of creep is often seen in the presence of physical characteristics like bent trees, tilted fences, and cracked walls.  Creep is caused by multiple factors, of which heaving is likely the most important process. <em>Heaving involves the expansion and contraction of rock fragments, and occurs during cycles of wetting and drying, as well as freezing and thawing.</em>

4 0
3 years ago
Read 2 more answers
I don’t know if this is right or not
riadik2000 [5.3K]
It's right
The equation
7 0
3 years ago
Other questions:
  • The sum of 7 and y is less than 18.
    6·1 answer
  • 17 points! Please help!
    12·2 answers
  • 1+4=5 2+5=12 3+6=21 what is 8+11=
    9·1 answer
  • A mountain's peak is 1,224 feet above sea level while the valley is 339 feet below sea level. What is the elevation drop between
    15·2 answers
  • line 1 passes through points (4, -4) and (8,-3) while line 2 passes through points (1,-6) and (-1,2). determine whether the line
    6·1 answer
  • I need loads of help!! If you know how to do this please help me!!!<br><br> It’s 6 and 7
    13·1 answer
  • The last week of a month a car dealership sold 12 cars. A new sales promotion came out the first week of the next month and the
    14·1 answer
  • How much must you add to -12 to get a number greater than 5?
    10·1 answer
  • Twenty more than half a number is 70. What is the number
    9·2 answers
  • A student pushes a box across the floor using 8w of power in 7 seconds how much work does the student do
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!