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2 years ago

A letter used to represent a number in equations or expressions

1 answer:

6 0

The answer is “x”. “x” represents the missing number in the problem.

Example:
16+x=20
The missing number, 4, would be represented as x. Hope this helps!

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1) 5x-2y=4. 2) 3x-5y=13 x-2y=5 3x+y=9

Natali [406]

$\left\{\begin{array}{ccc}5x-2y=4\\3x+y=9&/\cdot2\end{array}\right\\+\left\{\begin{array}{ccc}5x-2y=4\\6x+2y=18\end{array}\right\\----------\\.\ \ \ \ \ 11x=22\ \ \ \ /:11\\.\ \ \ \ \ \ \ x=2\\\\3\cdot2+y=9\\6+y=9\\y=9-6\\y=3\\\\Answer:x=2;\ y=3$

$\left\{\begin{array}{ccc}3x-5y=13\\x-2y=5\end{array}\right\\\left\{\begin{array}{ccc}3x-5y=13\\x=2y+5\end{array}\right\\\\substitute:\\\\3(2y+5)-5y=13\\6y+15-5y=13\\y=13-15\\y=-2\\\\x=2\cdot(-2)+5=-4+5=1\\\\Answer:x=1;\ y=-2.$

5 0

2 years ago

Tamara owns 595 shares of stock in a home appliance company. The value of the stocks is $12.75 per share. The company offers a 5

emmainna [20.7K]

Answer:

she would get 12.75 per eache 63.75 that the company gets hope this helps

Step-by-step explanation:

7 0

3 years ago

Evaluate tan^-1(1) Easy points!!

STatiana [176]

Answer:

its 45

Step-by-step explanation:

lol thanks man

7 0

2 years ago

Read 2 more answers

Please answer this correctly

Crank

Answer:

Its absolutely cone , it has one triangle face seen from front , and a circular base

8 0

3 years ago

Read 2 more answers

You travel 10.7 miles (1 way) for work 5 days a week. On weekends you travel 5.8 miles. The last time you filled your tank you p

Kamila [148]

Answer:

1. 0.0731 miles per gallon

2. $967.46

Step-by-step explanation:

The I way travel for 5 days to work will cover: 10.7 miles.

A two travel to work and back home will be : 10.7* 2 =21.4 miles

On weekends miles covered = 5.8 miles

Last time the tank was filled with = 17.2 gallons of gas

The Trip A meter read = 389.30 ----this is the average fuel mileage

This means the trip consumed : 389.30 - 17.2 = 372.1 gallons of gas

Total miles covered are : 21.4 + 5.8 = 27.2 miles

1. Miles per gallon for the car will be;

372.1 gallons of gas = 27.2 miles

1 gallon of gas = ?

{27.2 *1} / 372.1 = 0.0731 miles per gallon

2. Cost of gas per week will be ;

In the United States :

1 gallon of gasoline = $2.60

372.1 gallons of gas = ? $2.60 * 372.1 = $967.46

3 0

2 years ago