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2 years ago

ILL GIVE BRAINLIEST.

Mathematics

2 answers:

Anton [14]2 years ago

8 0

Answer:

The answer would be 'D': y=6.5x

Step-by-step explanation:

Since y would be the total amount, it'd be weird if it was x=6.5y since the part would be more than the total. Plus, for every roll, it sells for $6.50, and when it multiplies by x (the amount sold) you would get y (the total).

marysya [2.9K]2 years ago

5 0

Answer:

Step-by-step explanation:

There is only one variable in this situation which means you can rule out A and C, B is wrong because it said it wants Y, so D is your answer!

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Find the cost of painting a cubical block of side length 3.2 cm, if painting costs $5 per cm2.

SashulF [63]

<h3><u>Answer</u>:- </h3>

$\longrightarrow \sf \$ \: 307.2$

<h3><u>Solution:-</u></h3>

Since painting is done on outer surface of cubical block we will have to find its surface area which is given by-

$\green{ \underline { \boxed{ \sf{Surface \: area \:of \:Cube = 6a^2}}}}$

<u>where a is side of the cube </u>

$\begin{gathered}\\\quad \sf Surface \: area \:of \:Cube = 6\times(3.2)^2 \\\end{gathered}$

$\begin{gathered}\\\implies \quad \sf 6\times 3.2\times3.2 \\\end{gathered}$

$\begin{gathered}\\\implies \quad \sf 61.44 cm^2 \\\end{gathered}$

Now,

$\maltese \sf Cost \:of \:painting \: 1 \: cm² = \$ 5$

$\sf Cost \: of \: painting \: 61.44 \:cm²=61.44×5$

$\sf\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad=\$ 307.2$

$\leadsto$ Thus it would cost $ 307.2 to paint the entire cubical block.

3 0

2 years ago

K over 1.5 equals 3 what is k

jeyben [28]

Answer:k=4.5

Step-by-step explanation:4.5/1.5=3

7 0

3 years ago

The total revenue R earned (in dollars) from producing a gift box of candles is given by R(p)=-10p^2+800p, where p is the price

kherson [118]

A.) R(20) = -10(20)^2 + 800(20) = -10(400) + 16000 = -4000 + 16000 = $12,000

R(25) = -10(25)^2 + 800(25) = -10(625) + 20000 = -6250 + 20000 = $13,750

R(30) = -10(30)^2 + 800(30) = -10(900) + 24000 = -9000 + 24000 = $15,000

b.) For maximum revenue, dR/dp = 0
dR/dp = -20p + 800 = 0
20p = 800
p = 40

Therefore, the maximum revenue will be recorded when the price is set at $40.

4 0

3 years ago

HELP PLSS WILL GIVE BRAINLIEST!

nydimaria [60]

15 i am pretty sure i’m probably gonna be wrong

3 0

3 years ago

Read 2 more answers

Prove that if xy > 0, then either x > 0 and y > 0 or x < 0 and y < 0

Rufina [12.5K]

The rule of product states that: