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
ExtremeBDS [4]
3 years ago
8

Y varies directly with x, and y = 7 when x = 2. What is the value of y when x = 5?

Mathematics
1 answer:
____ [38]3 years ago
3 0
Y varies directly with x"  means y = constant * x  or y = kx  ----- (1)1.  when x = -1/2, y = 2Put it in (1):2 = k * (-1/2)multiply by 2:4 = k * (-1)4 = -kk = -4y = -4x
"find the value of y when x= -0.3"y = -4x = (-4) * (-0.3) = 1.2


So for each problem, start with y = kxThey give you one x and one y value.Put it in y = kx and find k.Then put x = -0.3 and find y.


You might be interested in
Jose takes 120 minutes to weed 6 equal rows of vegetable plants in his garden. What is his unit rate
Zarrin [17]

Answer:

3 rows/hour

Step-by-step explanation:

It is given that, Jose takes 120 minutes to weed 6 equal rows of vegetable plants in his garden.

120 minutes = 2 hours

We need to find the unit rate per hour for weeding these rows of his garden. It can be calculated as follows :

R=\dfrac{6}{2}\\\\R=3\ \text{rows/hour}

So, the rate for weeding these rows of his garden is 3 rows per hour.

6 0
3 years ago
Mikel asked her father how old he is gues the father said I you add the digits that make my age this year you'll get a number th
Alexxx [7]

Answer:

For the sum of the digits of Michelle’s father to drop to 1/3 of its’ former value, the second digit must go from 9 to 0, in one year.

Thus, if he is 39 this year, the sum of the digits of his age will be 12. Next year, when the sum of the digits would be 4+0, or 4, then the digits of his age would be 1/3rd of their former value.

Therefore, he is 39, and will be 40 next year

Step-by-step explanation:

7 0
2 years ago
Warm Up
katrin [286]

Given the slope m and a point (a,b) of a line, its equation is given by

y-b=m(x-a)

In your case, a = -4, b = 7 and m=1/2, so we have

y-7=\dfrac{1}{2}(x+4) \iff y=\dfrac{x}{2}+2+7\iff y=\dfrac{x}{2}+9

6 0
3 years ago
Simplify the expression completely. (5√50-3√200+3√18)
Kaylis [27]

Answer:

4\sqrt{2}

Step-by-step explanation:

5\sqrt{50} - 3\sqrt{200}  + 3\sqrt{18} =

= 25\sqrt{2} - 30\sqrt{2} + 9\sqrt{2} = 4\sqrt{2}

8 0
3 years ago
Read 2 more answers
What is the integer of-2​
Gnom [1K]

Answer:

-2

Step-by-step explanation:

The integer of - 2 is - 2 only as integers can be positive and negative whole numbers

4 0
3 years ago
Other questions:
  • How do I turn 35 into a fraction?
    9·1 answer
  • What is the volume?<br> V=
    10·1 answer
  • The function f has the property that f(x)=f(x+1) for all numbers x. If f(4)=17, what is the value of f(8)?
    9·1 answer
  • Prove the sum of two rational numbers is rational where a, b, c, and d are integers and b and d cannot be zero. Steps Reasons 1.
    14·2 answers
  • 19.75 with a 6 percent tax
    13·1 answer
  • What is 38,496 rounded to the nearest ten thousand
    5·2 answers
  • 1.A pedestrian crosswalk consists of black and white strips each 0.4m wide. The crosswalk begins and ends with a white strip, an
    5·1 answer
  • A recipe for cookie dough calls for three and two third cups of flour. Jane only ha 1 and three fourth cups of flour. How many m
    15·1 answer
  • These spam comments are getting out of hand. They’re everywhere and it’s really annoying having to post another question because
    14·2 answers
  • If two rectangles have the same perimeter, do they have to be congruent? Explain how you know.
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!