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4 years ago

Please help asap! thank you

Mathematics

1 answer:

Cerrena [4.2K]4 years ago

4 0

Answer:

Step-by-step explanation:

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Need simplified please

Tcecarenko [31]

Answer:

-4

Step-by-step explanation:

$\dfrac{(-8)(-5)-(4)(5)}{5[8\div(5-13)]}= \\\\\\\dfrac{40-20}{5[-1]}= \\\\\\\dfrac{20}{-5}= \\\\\\-4$

Hope this helps!

6 0

4 years ago

Read 2 more answers

Tim goes on a car journey.

Lesechka [4]

Answer:

1. Attached

2. 25 mph

Step-by-step explanation:

1. Tim travels first 15 minutes $=\frac{1}{4}$ hour at average speed of 40 mph and passed

$40\times \dfrac{1}{4}=10\ miles$

2. Time stops for 25 minutes (distance traveled = 0 miles).

3. He then completes the journey at an average speed of 45 mph. The total journey time is 1 hour, then he was travelling at 45 mph for

$60-15-25=20\ minutes=\dfrac{1}{3}\ hour$

and covered

$45\times \dfrac{1}{3}=15\ miles.$

The distance-time graph for his journey is attached.

Find the average speed for the whole journey:

$\text{Average speed}=\dfrac{\text{Total distance}}{\text{Total time}}=\dfrac{10+15}{1}=25\ mph$

7 0

4 years ago

2. R(1, 1), 5(1,7), Т(5,7), U(5, 1); k =<br> 45<br> у<br> о<br> Help

Gekata [30.6K]

(5,7) because when you divide that’s the answer you get

8 0

3 years ago

What is the solution to the differential equation dydx=5y2 with the initial condition y(0) = 3?

IceJOKER [234]

Answer:

Step-by-step explanation:

$dydx = 5y^{2} \\\frac{dy}{5y^{2}} = dx\\$

Integrating both sides yields:

$-\frac{1}{5y} = x + c\\ y = -\frac{1}{5x + 5c} \\y(0) = 3 => 3 = -\frac{1}{0 + 5c} => c = -\frac{1}{15}$

Our solution is:

$y = -\frac{1}{5x - \frac{1}{3} }$

3 0

3 years ago

Please solve with explanation

WINSTONCH [101]

Answer:

56+8√2=8(7+√2)

Step-by-step explanation:

1. P= AB+BC+CD+DE+EF+FG+GA

2. AB=DC=12

BC=16

AG=ED=4

AG+ED+GE=16

4+4+GE=16

GE=16-8

GE=8

GF²= EF²+GE²

GF²=64+64

GF²=128

GF=8√2

3.P= 12+16+12+4+8+8√2+4= 56+8√2

5 0

3 years ago

Read 2 more answers