Ask question

Ask question

All categories

murzikaleks [220]

3 years ago

5

three postal workers can sort a stack of mail in 30 minutes, 30 minutes, and 60 minutes, respectively. find how long it takes th

em to sort the mail if all three work together.

2 answers:

mote1985 [20]3 years ago

8 0

Answer:

Step-by-step explanation:

t/30+t/30+t/60=1

2t/60+2t/60+t/60=1

5t/60=1

5t=60

t=12 minutes

OverLord2011 [107]3 years ago

5 0

Answer:

it will take about 1/3 of the time (10 minutes)

Step-by-step explanation:

You might be interested in

Solve 1 over 36 = 6x−3.<br><br> x = −5<br> x = negative 3 over 2<br> x = 7 over 2<br> x = 1

vlabodo [156]

6*(-5)-3 = -33
6*(-3/2)-3 = -12
6*(7/2)-3 = 18
6*(1)-3=3

3 0

3 years ago

Read 2 more answers

I don't understand. Please help answer questions!!!!!!

insens350 [35]

16) yes, they are reflections on a summit.
17) no parallelogram shown to answer question <span />

7 0

3 years ago

Find the area of the composite shape:

Stells [14]

Answer:

5×14×14×4=3,920 cm

Step-by-step explanation:

Multiply all numbers to find the area.

5 0

3 years ago

a taste test asks people from Texas and California which pasta they prefer, brand A or brand B. this table shows the results

ELEN [110]

Answer:

D.

Step-by-step explanation:

Two events A and B are independent when

$P(A|B)=P(A),$

where $P(A|B)$ is the probability that event A occurs given that event B has occured.

A = randomly selected person is from California

B = randomly selected person preferred brand A

A|B = being a person from California and preferring brand A.

Hence,

$P(A)=\dfrac{150}{275}=\dfrac{6}{11}\approx 0.55\\ \\P(B)=\dfrac{176}{275}=\dfrac{16}{25}=0.64\\ \\P(A|B)=\dfrac{96}{176}=\dfrac{6}{11}\approx 0.55$

Since $P(A)=P(A|B),$ events are independent.

4 0

3 years ago

Read 2 more answers

Help me please . quick :)

ycow [4]

Answer:

x= 1

QS = 10 cm

QRS = 40cm

Step-by-step explanation:

4x + 1 = 5x

x= 1 cm

QS = 4x + 1 + 5x

= 9x + 1

= 9 + 1

= 10cm

QRS perimeter

QS + RQ + RS but ( RQ = RS)

= 10 + 15 + 15

= 40cm

3 0

3 years ago