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2 years ago

[please answer quickly] it takes 8 hours to paint a room. how long will it take to paint 2/3 of the room?

Mathematics

1 answer:

Lunna [17]2 years ago

7 0

Answer:

5 hours 20 minutes.

Step-by-step explanation:

8 * 2/3

= 16/3

= 5 1/3

= 5 hours 20 minutes.

You might be interested in

Are these two expressions equivalent?<br> 40 divided by 10 and 10 divided by 40

GarryVolchara [31]

Answer:

Step-by-step explanation:

40/10 = 4

10/40 = 0.25

5 0

4 years ago

Let f(x)=x-1,h(x)=-x+4. Find (f o h)(4). (f o h)(4)=

bagirrra123 [75]

Answer:

-1

Step-by-step explanation:

(f⚬h)(4) = f(h(4)) = f(-4+4) = f(0)

f(0) = 0-1 = -1

(f⚬h)(4) = -1

5 0

3 years ago

Your friend calculates the distance between points Q(1,5) and R(3,8), as shown below. What is his error?

borishaifa [10]

The distance between two points is the number of units between them.

The distance between Q and R is 3.61 units

<em>It is impossible to determine your friend's error, because the steps are not given in the question. So, I will calculate the distance between Q and R, instead.</em>

<em />

The distance (d) between two points is:

$d = \sqrt{(x_1 - x_2)^2 + (y_1 - y_2)^2}$

So, the distance QR is:

$QR = \sqrt{(1 - 3)^2 + (5 - 8)^2}$

$QR = \sqrt{(- 2)^2 + (- 3)^2}$

Evaluate exponents

$QR = \sqrt{4 +9}$

$QR = \sqrt{13}$

Take square root of 13

$QR = 3.61$

Hence, the distance between Q and R is 3.61 units

Read more about distance at:

brainly.com/question/16310813

8 0

2 years ago

Sophie Ruth is eating a 505050-gram chocolate bar which contains 30\%30%30, percent cocoa.

likoan [24]

Answer:

60%

Step-by-step explanation:

she probably eats almost 60% of the cocoa contained in the chocolate. which is high and would increase the caffeine levels in her body

8 0

3 years ago

(x+3)(x−2)/(x+7)^2 ≥0

LiRa [457]

Answer:

(x+3)(x−2)/(x+7)^2 ≥0 when x ≤ -3 or x ≥ 2.

Step-by-step explanation:

(x+3)(x−2)/(x+7)^2 ≥0

The critical values are (x + 3)(x - 2) = 0.

That is when x = -3 and x = 2.

Set up a table:

x < - 3 x = -3 -3 < x < 2 x = 2 x > 2

x + 3 -ve 0 +ve 0 +ve

x - 2 -Ve -ve -ve 0 +ve

(x+7)^2 +ve +ve +ve +ve +ve

Whole

function + ve 0 - ve 0 +ve

So the function is ≥ 0 when x ≤ -3 and x ≥ 2.

6 0

3 years ago