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3 years ago

7. Select all the properties that can be

Mathematics

1 answer:

mixer [17]3 years ago

8 0

Answer:

$7y-15=-29$

The steps to solve this is as follows:

Adding 15 to both sides;

$7y-15+15=-29+15$ (Addition Property of Equality)

=> $7y =-14$

Diving by 7 on both sides we get;

$\frac{7y}{7} =\frac{-14}{7}$ (Inverse Property of Multiplication)

Finally we get;

$y= -2$

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1. After quarantine is over, you and your family are planning to rent a van for a 1-day trip to Knott’s Berry Farm in Buena Park

kupik [55]

9514 1404 393

Answer:

A) Enterprise: E(x) = 50 +0.25x; Hertz: H(x) = 30 +0.45x

B) see attached graph

Step-by-step explanation:

A) We choose to compare Hertz (lowest daily charge) and Enterprise (lowest mileage charge). In each case, the total charge will be the sum of the daily charge and the product of the mileage charge and number of miles (x).

Enterprise: E(x) = 50 +0.25x

Hertz: H(x) = 30 +0.45x

3 0

3 years ago

It takes a train 60 seconds to completely drive through a bridge of 1260 m, and 90 seconds to completely drive through a tunnel

Olegator [25]

The length of train is 120 meters

The speed of train is 25 meter per second

Solution:

The speed is given by formula:

$speed = \frac{distance}{time}$

Given that,

It takes a train 60 seconds to completely drive through a bridge of 1260 m

And 90 seconds to completely drive through a tunnel of 2010 m

Let the length of the train be "x"

The total distance travelled by the train across the bridge is given by:

total distance = x + 1260 + x = 2x + 1260

[ here we use x + x to represent that train completely drives through bridge ]

The time taken is given as 60 seconds

Therefore, the speed is given as:

$speed = \frac{2x+ 1260}{60}$

The total distance travelled by the train through the tunnel is given by:

total distance = x + 2010 + x = 2x + 2010

The time taken is given as 90 seconds

Therefore, the speed is given as:

$speed = \frac{2x+ 2010}{90}$

The speed of the train was the same in both cases.

Equate both speeds

$\frac{2x+ 1260}{60} = \frac{2x+ 2010}{90}$

$\frac{x+630}{30} = \frac{x+1005}{45}$

$45(x+630) = 30(x+1005)\\\\45x + 28350 = 30x + 30150\\\\45x - 30x = 30150 - 28350\\\\15x = 1800\\\\x = 120$

Thus length of train is 120 meters

Find the speed of train:

$speed = \frac{2x+ 1260}{60}\\\\speed = \frac{2(120) + 1260)}{60}\\\\speed = 25$

Thus speed of train is 25 meter per second

5 0

3 years ago

My hw is do tmrw plz help (answer 4 and 5)

Serggg [28]

Answer:

4 is 1

5 is 2

Step-by-step explanation:

hope this helps:P

4 0

3 years ago

Choose the more precise measurement. A) 32.5 lb B) 28.35 lb *

s2008m [1.1K]

Answer:

B is the answer

Step-by-step explanation:

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3 years ago

Describe what solving a trigonometric equation is.

AleksAgata [21]

That's an awfully broad question. Could you not be more specific?

A basic example: Suppose you are told that sin theta = 1/2. Solving this equation would require finding the measure of the angle theta. In this case the answer would be "30 degrees," or "pi/6 radians."

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3 years ago