If if x+y=10, find the value of y when x=3

Answers

Answer 1

Answer: Let me help you,

for this question, you know what is x and you wanna find the y.
So the only thing you should do is to put 3 for x and solve the equation:
3 + y = 10
y = 10 -3
y = 7

Hava great one!

Answer 2

Answer: Hey, Hardq!
The problem already gave us x. So we plug it in.
3+y=10
We now want to make the variable by itself, so we subtract 3 to the other side.
y=10-3
Simple Math
y=7
I hope this helps;)

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Plz help quick i will mark u brainiest its about transishons

Answers

Answer:

(x,y) --> (x+4, y-5)

Step-by-step explanation:

A is correct. B can be represented as x+4, y - 5 because the x values shifted 4 to the right (a positive shift so x+4) and the y values shifted 5 down (a negative shift so y-5)

At the end of May, Janet told Sam that she has read 10 books this year and reads 2 books each month. Sam wants to catch up to Janet. He tracks his book reading with a table on his door. Using his table below, what month will Sam have read the same amount of books as Janet?A. November
B. December
C. Janurary
D. March

Answers

Answer:

Step-by-step explanation:

march

Answer:

D- March

Step-by-step explanation:

I took the quiz

Determine the remainder when (5x3 + 49x2 + 74x + 6) is divided by (x + 8).

Answers

Determine the remainder when (5x3 + 49x2 + 74x + 6) is divided by (x + 8)

-103?

The tangents of of the problem, I don't know how to solve.

Answers

hmmm anyhow.. how are you meant to get it? by means of a trigonometric identity? or by something else?

notice the picture

the point of tangency for the diameter and a tangent to a circle, is always at right angle

How do u work out 11x=24+8x

Answers

Answer:

x = 8

Step-by-step explanation:

First: Subtract 8x from both sides

You will be left with 3x = 24

then divide 3 from both sodes

you will be left with x=8

Suppose that a when a cell phone store charges 16$ for a car charger, it sells 92 units. When it drops the price to 15$ it sells 96 units. Assume that demand is a linear function of price. If each phone charger costs 1$ to make, what price should the store charge to maximize its profit?
If x is the number of times the price is reduced by one dollar.

Find a function for total profit with respect to x. A negative value for x will mean the price is increased.

Answers

D(x) = mx + c ; where x is selling price , c is constant, m is slope
given D = 21 when x = $16
21 = 16m + c ------------1) and also we know D = 24 unit, when x = $15,
24 = 15m + c ------------2)
subtract eqn 2) from eqn 1) we get
-3 = m , and plug this value of m in eqn 1) we get
21 = 16*(-3) + c => c = 69
hence demand function
D(x) = -3x + 69
Cost price is C = $1
Profit = Revenue - Cost price
P(x) = Demand*Selling price - Cost per unit* Demand
P(x) = (69 - 3x)*x - 1*(69 - 3x)
P(x) = 69x - 3x² - 69 + 3x ; or
P(x) = - 3x² + 72x - 69 -------------Answer
Differentiate profit function with respect to x (selling price)
dP/dx = -3*2x + 72 - 0
0 = 72 - 6x ; plug dP/dx = 0 for maxima minima
6x = 72
x = $12 per unit --------Answer
(Since d²P/dx² = -6 < 0 , hence profit will be maximum at x = $12 per unit
and Demand would be D(@12) = 33 unit
Revenue = 33*$12 = $396
Cost = $1*33 = $33
Max Profit = #396 - $33 = $363

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