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
Leya [2.2K]
3 years ago
12

Y varies directly with x, and y=24 when x=-15. what is x when y=16? a) 10 b) -22.5 c) -10 d) -25.6

Mathematics
1 answer:
mestny [16]3 years ago
4 0

Answer:

c

Step-by-step explanation:

Given that y varies directly with x then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition y = 24 when x = - 15, then

24 = - 15k ( divide both sides by - 15 )

k = \frac{24}{-15} = - \frac{8}{5} = - 1.6 , thus

y = - 1.6x ← equation of variation

When y = 16, then

16 = - 1.6x ( divide both sides by - 1.6 )

x = - 10 → c

You might be interested in
Are the following triangles similar? Justify your answer.
alukav5142 [94]
Yes. The triangles are both right triangles, which means they both have a single right angle.
3 0
3 years ago
Please welp me I need help
Thepotemich [5.8K]
It would be 18 have a great day
6 0
3 years ago
Read 2 more answers
Select the correct answer.
Burka [1]

The equation in which b varies directly as the <em>square</em> root of c is b = 50 · √c. (Correct choice: B)

<h3>What is the equation of the direct variation between two variables?</h3>

In this problem we have a case of <em>direct</em> variation between two variables, which is mathematically described by a <em>direct proportionality</em> model, whose form and characteristics are shown below:

b ∝ √c

b = k · √c      (1)

Where k is the <em>proportionality</em> constant.

First, we determine the value of the constant of proportionality by substituting on b and c and clearing the variable: (b = 100, c = 4)

k = b / √c

k = 100 / √4

k = 100 / 2

k = 50

Then, the equation in which b varies directly as the <em>square</em> root of c is b = 50 · √c. (Correct choice: B)

To learn more on direct variation: brainly.com/question/14254277

#SPJ1

7 0
2 years ago
Plz help quickly only I need the answer
Nastasia [14]

Answer:

the second one

Step-by-step explanation:

4 0
2 years ago
Which is largest 4.12 or 4.21
Mademuasel [1]
The largest number is 4.21
6 0
3 years ago
Read 2 more answers
Other questions:
  • 4x = 24 + 6x <br> 19 <br> 96<br> 64<br> 82
    11·1 answer
  • How do you write 0.326 in word form?
    10·1 answer
  • 220/100=22 tenths=2 ones 2=tenths=
    9·1 answer
  • When using the quadratic formula if there is no b value then do you say b is 1 or 0
    6·2 answers
  • 5^x + 5^x+1= 150<br> Find x<br> Help me pls i need soon<br> Tksss
    11·1 answer
  • -2x+8_&lt; -4 <br> What’s the solution I need help please
    6·1 answer
  • 783/32 as a mixed number
    15·2 answers
  • Jordan is kayaking upstream. The following equation model his speed: f(x) = 2x2 − 4x − 9, where x is Jordan's speed relative to
    10·2 answers
  • What is the LCD of the following rational expressions?
    11·2 answers
  • FIRST ACTUAL ANSWER WILL GET BRAINLY 25 POINTS
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!