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
Square of a binomial x^2+2x+1
garik1379 [7]
To put an equation into (x+c)^2, we need to see if the trinomial is a perfect square. 
General form of a trinomial: ax^2+bx+c
If c is a perfect square, for example (1)^2=1, 2^2=4, that's a good indicator that it's a perfect square trinomial. 
Here, it is, because 1 is a perfect square.
To ensure that it's a perfect square trinomial, let's look at b, which in this case is 2. 
It has to be double what c is.
2 is the double of 1, therefore this is a perfect square trinomial. 
Knowing this, we can easily put it into the form (x+c)^2.
And the answer is: (x+1)^2.
To do it the long way:
x^2+2x+1
Find 2 numbers that add to 2 and multiply to 1. 
They are both 1.
x^2+x+x+1
x(x+1)+1(x+1)
Gather like terms
(x+1)(x+1)
or (x+1)^2.
3 0
3 years ago
CAN SOMEONE HELP ME PLEASE!
IRISSAK [1]
The screens to blurry, you can’t understand the words
5 0
3 years ago
I don’t know the answer and I’m not good at math at all
ch4aika [34]

Answer: Tia payed .15 more

Step-by-step explanation:

Divide the Money amount by the number of juice boxs and then subtract

3 0
3 years ago
Read 2 more answers
Write two numbers that multiply to the value on top and add to the<br> value on bottom.
Airida [17]
I think the answer is 2 and -15. Because 2 times - 15 is -30 and 2 and -15 can be added to -1.
4 0
3 years ago
The maximum amount of money offered by the Direct Stafford Loan for an undergraduate student is _____.
lora16 [44]

Answer:

31,000 on apex

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • The volume of a rectangular prism is 16.328 cm³. The height is 3.14 cm.
    9·1 answer
  • If a paper manufacturer produces 1,250,000 sheets of paper a day, and 5.80×10^6 sheets are used to make 1.45×10^4 school noteboo
    10·1 answer
  • Use substitution to write an equivalent quadratic equation.<br> (3x + 2)2 + 7(3x + 2) – 8 = 0
    5·2 answers
  • Clayton used a combination of brown and white tiles on a kitchen floor. For every 2 dozen brown tiles, he uses 8 white tiles. Wh
    7·1 answer
  • Please help.....………………
    6·2 answers
  • Help help help help help 20 points
    8·1 answer
  • Write an expression for the calculation subtract 10 divided into fifths from 20 divided in half.​
    8·2 answers
  • Which of the following values of z will result in a true statement when substituted into the given equation?
    8·2 answers
  • Find f(3) for f(x)=1/2(4)^x.<br> O A. 32<br> O B. 64<br> O c. 6<br> 6<br> O D. 8
    13·1 answer
  • A body moves s metres in a time t seconds so that s = t3 – 3t2 + 8. Find:
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!