Ask question

Ask question

All categories

2 years ago

13

mark can cleaN the house in 7 hours. when he cleans the same house with wend, it takes them 3 hours to clean the house. how long

would it rake wendy to clean the house by herself

2 answers:

nevsk [136]2 years ago

8 0

Answer:

4

Step-by-step explanation:

blondinia [14]2 years ago

7 0

Answer:5.25

Step-by-step explanation:

3(1/7 + 1/x) = 1

3([x + 7]/7x) = 1

3x + 21 = 7x

4x = 21

x = 21/4 OR 5.25

You might be interested in

Two 6-sided dice are tossed simultaneously. what is the probability of the total being equal to 9?

prohojiy [21]

Total number of outcomes = 36

Number of outcomes with total being 9 = 4
(6, 3) (5,4), (4, 5) (3, 6)

P(equal to 9) = 4/36 = 1/9

Answer: 1/9 (Answer A)

3 0

3 years ago

The polynomial 6x2 x − 15 has a factor of 2x − 3. what is the other factor? 3x − 5 3x 5 4x − 5 4x 5

Andrew [12]

6x^2 + x - 15 = 6x^2 - 9x + 10x - 15 = 3x(2x - 3) + 5(2x - 3) = (3x + 5)(2x - 3)
Therefore, the other factor is 3x + 5.

8 0

3 years ago

Read 2 more answers

What is the value of 5k2−6 when k = 9?

Anarel [89]

Answer:

84

Step-by-step explanation:

Plug in 9 for k.

5(9)(2) - 6

first: (9)(2) = 9 x 2 = 18

5(18) - 6

second: 5(18) = 5 x 18 = 90

last: 90 - 6 = ?

84

hope this helps

5 0

2 years ago

The planet Mercury measures 4,879 kilometers from one side to the other. Earth

nikklg [1K]

(12,756 kilometers) - (4,879 kilometers) = 7,877 kilometers

4 0

3 years ago

Read 2 more answers

Need help with 35 thank you so much!!

Yakvenalex [24]

If a pentagon is regular, then all of the sides are the same length. This means that

$5x-4=2x+11 \iff 5x-2x = 11+4 \iff 3x=15 \iff x = 5$

So, if $x=5$ , the lengths of the sides evaluate to

$5x-4 = 25-4=21,\quad 2x+11=10+11=21$

So, all the sides of the pentagon are 21 units long, and AB is 21 units long as well, because all sides are the same length.

3 0

3 years ago