3 years ago

Guys can u help me im cunfused

Mathematics

1 answer:

andrey2020 [161]3 years ago

5 0

Answer:

Step-by-step explanation:

-k + 3k = 2k

You might be interested in

The Magic Carpet charges $90 for installation and $9 per square yard of carpeting. If the total cost to carpet an office is $810

dimaraw [331]

Answer:

<h2>11.11 square yard </h2>

Step-by-step explanation:

Step one:

given data

charges=$90

installation=$9 per square yard

total cost of installation= $810

let x represents the number of square feet

Step two:

The expression for the installation cost is given as

810=9x+90------------1

solve for x, collect like terms

810-90=9x

720=9x

divide both sides by 9 we have

x=720/9

x=11.11 square yard

4 0

3 years ago

A tanker truck has overturned and is spilling oil onto the highway. Amazingly, the region covered by the oil spill maintains a p

Sav [38]

Answer:

The radius of the oil spill growing at 2 feet per minute

Step-by-step explanation:

Area of a circle is

$A=\pi r^2$

Differentiating A with respect to r,

$\dfrac{dA}{dr} = 2\pi r$

When $A=100\pi$ ,

$100\pi = \pi r^2$

$r = 10$

The rate of growth of the spill is

$\dfrac{dA}{dt} = 40\pi$

This is equivalent to

$\dfrac{dA}{dt} = \dfrac{dA}{dr} \times \dfrac{dr}{dt}$

$\dfrac{dr}{dt} = \dfrac{dA}{dt}/\dfrac{dA}{dr} = \dfrac{40\pi}{2\pi r} = \dfrac{20}{r}$

$\dfrac{dr}{dt} = \dfrac{20}{10} = 2$

7 0

3 years ago

Read 2 more answers

How much shorter of a kiloliter is 498 Litre?

Dmitriy789 [7]

Answer:

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Write L if it is Likely to happen and Write U if it is unlikely to happen. Topic is probability

erica [24]

Answer:

1h b+h boi gate

Step-by-step explanation:

4 0

3 years ago

4.2 x -2.6 <br> A) 10.96 <br> B) -10.96<br> C) -109.6<br> D) -1.096

torisob [31]

Answer:

Step-by-step explanation:

Hope this helps! Good Luck

5 0

4 years ago