All categories

2 years ago

Heather spent a total of 70 minutes working out at the gym.

Mathematics

1 answer:

Jobisdone [24]2 years ago

6 0

Answer:

choice 4

Step-by-step explanation:

t = treadmill time

w = wt lift time

70 is total time

so t+w = 70

next t is 20 more than w

t = w+20

You might be interested in

A plant grows 3 centimeters in 10 days. How much does it grow per day? Write your answer as a fraction in simplest form

ASHA 777 [7]

It grew 3/10, which equals 0.3 centimeters every day, and as a fraction, 3/10 would be the answer.

3/10 is the answer.

Hope this helps, and have a nice day!

5 0

2 years ago

Read 2 more answers

Evaluate the diagram below

tigry1 [53]

Answer:

Only option (A) is incorrect.

So , true statements are (B), (C) &(D).

#$# THANK YOU #$#

4 0

2 years ago

Read 2 more answers

On a certain game show, contestants pick 5 number balls from a bag containing 20 numbered balls (0-19). After each draw, the bal

Gnoma [55]

Answer:

5/20 or 25% probability of winning $1,000,000

Step-by-step explanation:

How many numbered balls do they need to win?

How many balls are there?

Therefor your answer is (balls need to win/number of balls).

4 0

1 year ago

A tank contains 1000 L of pure water. Brine that contains 0.05 kg of salt per liter of water enters the tank at a rate of 5 L/mi

Margaret [11]

Answer:

a) $y(t)=0.65\frac{Kg}{min}(tmin)$

b) $y(40)=26Kg$

Step-by-step explanation:

Data

Brine a (Ba)

$V_{Ba}=5\frac{Lt}{min}\\ Concentration(Bca)=0.05\frac{Kg}{Lt}$

Brine b (Bb)

$V_{Bb}=10\frac{Lt}{min}\\ Concentration(Bcb)=0.04\frac{Kg}{Lt}$

we have that per every minute the amount of solution that enters the tank is the same as the one that leaves the tank (15 Lt / min)

, then the amount of salt (y) left in the tank after (t) minutes: $y=V_{Ba}*B_{ca}+V_{Bb}*B_{cb}=5\frac{Lt}{min}*0.05\frac{Kg}{Lt}+10\frac{Lt}{min}*0.04\frac{Kg}{Lt}=\\0.25\frac{Kg}{min}+0.4\frac{Kg}{min}=0.65\frac{Kg}{min}$