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Naily [24]
3 years ago
6

Please solve problem # 42

Mathematics
1 answer:
sattari [20]3 years ago
7 0
Your mom(her thang+my thang)=you
0(0+1)=you
Thank me later (;
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Can someone please help with these 2 word problems ASAP.
PolarNik [594]

Answer:

4.     4.66hours

5.  time_trip = 2.777 h

Step-by-step explanation:

4. A jet plane travels 2 times the speed of a commercial airplane. The distance between Vancouver and Regina is 1730 km. If the flight from Vancouver to Regina on a commercial airplane takes 140 minutes longer than a jet plane, what is the time of a commercial plane ride of this route?

We know that

Speed_commercial = distance/ time_comm

Speed_commercial = 1730 km/ time_comm

Then,

Speed_jet = distance/ time_jet = 2*Speed_commercial

Speed_jet =   1730 km/ time_jet = 2*Speed_commercial

time_comm = 2.333 h + time_jet

1730 km/ time_jet = 2*1730 km/ time_comm

time_comm = 2*time_jet

time_comm = 2*(time_comm  - 2.333h)

time_comm = (2*time_comm  - 4.666h)

time_comm  = 4.666 h

5. A man goes fishing in a river and wants to know how long it will take him to get 10km upstream to his favourite fishing location. The speed of the current is 3 km/hr and it takes his boat twice as long to go 3km upstream as is does to go 4km downstream. How long will it take his boat to get to his fishing spot?

Distance = 10 km upstream

Speed_current = 3 km/h

Upstream

(Speed_boat - Speed_current)  = 3 km / (2*time_downstream)

Downstream

(Speed_boat + Speed_current)  = 4 km / (time_downstream)

We subtract both equations

(Speed_boat + Speed_current) - (Speed_boat - Speed_current) = 4 km / (time_downstream) - 3 km / (2*time_downstream)

2*Speed_current = (5/2 km)/ time_downstream

2*(3 km/h)= (5/2 km)/ time_downstream

time_downstream = 0.416 h

(Speed_boat + 3km/h)  = 4 km / (0.416 h)

Speed_boat  = 6.6 km/h

Trip upstream

(Speed_boat - Speed_current)  = 10 km / (time_trip)

time_trip = 10 km/(3.6 km/h) = 2.777 h

time_trip = 2.777 h

3 0
3 years ago
To make cherry turnovers, a cook cuts the dough into triangles with a base of 6 inches and a height of 3 inches. How many turnov
Inessa [10]

Answer:

<u>24 turnovers</u> can be cut from the rectangular piece of dough.

Step-by-step explanation:

Given:

A rectangular piece of dough is 12 inches wide and 18 inches long.

To make cherry turnovers, a cook cuts the dough into triangles with a base of 6 inches and a height of 3 inches.

Now, to find the number of turnovers can be cut from the dough.

So, we find the area of the triangle the cook cuts from the dough by putting formula:

<em>Base (b) = 6 inches.</em>

<em>Height (h) = 3 inches.</em>

Area=\frac{hb}{2} \\\\Area=\frac{h\times b}{2} \\\\Area=\frac{3\times 6}{2} \\\\Area=\frac{18}{2} \\\\Area=9\ inches^2.

<u><em>Thus, the area of the triangle cut from the dough is 9 inches².</em></u>

Now, to get the area of rectangular piece of dough by putting formula:

<em>Length = 18 inches.</em>

<em>Width = 12 inches.</em>

Area=length\times width\\\\Area=18\times 12\\\\Area=216\ inches^2.

<u><em>Hence, the area of the rectangular dough is 216 inches².</em></u>

Now, to get the number of turnovers can be cut from the rectangular piece of dough we divide the area of the rectangular dough by the area of the triangle cut from the dough:

\frac{216}{9} \\\\=24\ turnovers.

Therefore, 24 turnovers can be cut from the rectangular piece of dough.

8 0
4 years ago
5/8 minus negative 2/8<br> 5/8 - (-2/8)
blsea [12.9K]
I hope this helps you

7 0
3 years ago
What is a answer for <br> 4(8n-1)=19+32n
lord [1]

Answer:

No solution

Step-by-step explanation:

4(8n-1)=19+32n

Distribute the 4 to 8n-1

32n-4=19+32n

Add 4 on both sides

32n=23+32n

Subtract 32n on both sides.

Both 32n's cancel out so you are left with 0=23 which is false.

There is no solution

3 0
3 years ago
A shipping box, in the
lidiya [134]

Answer:

13 inches

Step-by-step explanation:

length of side of cube: x

volume of cube = x³ = 2300

x = ∛2300 = 13.2

5 0
3 years ago
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