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Sever21 [200]
3 years ago
13

Amy can mop the store in 30 minutes. James can mop the store in 45 minutes. How long would it take them if they worked together?

Mathematics
1 answer:
zavuch27 [327]3 years ago
5 0
Solve the equation 1/30 + 1/45 = 1/x  

where x is the required time

multiply thru by 90x:-

3x + 2x  = 90

x = 90 / 5 = 18

answer 18 minutes
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What is the value of the expression 1.6(x−y)2 when x = 10 and y = 5?
Luba_88 [7]

Answer:

1.6(10-5)2= 1.6(5)2= (8)(2)=16

Step-by-step explanation:

7 0
1 year ago
Read 2 more answers
–5(–11)=?????????? please help me and answer it
Alja [10]

Answer:

55

Step-by-step explanation:

-5 (- 11)

= 55

5 0
3 years ago
Read 2 more answers
Evaluate -5x^2 − 8x + 1 when x = -3.
Yakvenalex [24]

Hello.

Answer: 70

New equation: −5(−3^2)−(8)(−3)+1


How to get the answer:

(−5)(−9)−(8)(−3)+1

=45−(8)(−3)+1

=45−(−24)+1

=69+1

=70


Have  a nice day

7 0
3 years ago
Spends a total of $38.75 on 5 drinks and 2 bags of popcorn. Noah spends a total of $37.25 on 3 drinks and 4 bags of popcorn. Wri
Ira Lisetskai [31]

Answer:

3d + 4p = $37.25

5d + 2p = $38.75

Actual Answer:

Bag of popcorn is $5

A drink is $5.75

Step-by-step explanation:

Let drinks = d

Let popcorn = p

Noah: 3d + 4p = $37.25

Other: 5d + 2p = $38.75

Choose a variable to eliminate (We'll choose p)

3d + 4p = $37.25

(5d + 2p = $38.75) -2

Distribute

-10d - 4p = -77.5

The -4p cancels out the 4p, then we combine

-7d = -40.25

Divide both sides by -7

-7d/-7 = -40.25/-7

d = 5.75

Back to 3d + 4p = $37.25

Substitute d with 5.75

3(5.75) + 4p = $37.25

17.25 + 4p = 37.25

Move the constant to the other side

17.25 + 4p = 37.25

-17.25           -17.25

4p = 20

Divide both sides by 4

4p/4 = 20/4

p = 5

5 0
3 years ago
A total of 135 seats, 118 front handlebars (that steer the bike) and 269 wheels how many bicycles, tandem bicycles, and tricycle
lesya692 [45]

Answer: There are 35 bicycles, 33 tricycles and 50 tandem bicycles.

Step-by-step explanation:

Since we have given that

Number of seats = 135

Number of front handle bars = 118

Number of wheels = 269

Since there are 118 front handle bars.

And we know that each bicycle has 1 front handle bars.

So, total number of bicycles = 118

Now, each bicycle has 2 wheels

So, Number of wheels should be

118\times 2\\\\=236\ wheels

But here we have 269 wheels , it means it has tricycle which has 3 wheels.

So, Remaining wheels would be

269-236\\\\=33\ wheels

It means 33 bicycles has 3 wheels .

So, Number of tricycles = 33

So, Number of bicycles should be now

118-33=85

Each bicycle has 1 seat

So, number of seats should be 85

But we have 135 seats,

So, remaining seats should be of tandem bicycle.

135-85=50

So, Number of bicycles now becomes

85-50 = 35

Hence, there are 35 bicycles, 33 tricycles and 50 tandem bicycles.

3 0
3 years ago
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