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2 years ago

How do you write and solve equation with an unknown number?

1 answer:

8 0

You have to isolate the variable using inverse operations in order to get it alone. Example: x+3=5
Subtract 3 on both sides since you are adding 3, and subtraction is the opposite of addition.
x=2 is your answer. If you check and plug it in, you will see that it is a correct equation.

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Help me out here with this another equation the the sign on the left is the checking

omeli [17]

Put the same variable on the same side first than solve

5 0

2 years ago

Calls from a call box are charged per minute at one rate for the five minutes, then a different rate for each additional minute.

nirvana33 [79]

Answer:

c. $0.75 per minute at one rate for the first 5 minutes and $0.25 per minute thereafter

Step-by-step explanation:

The last 5 minutes of the 12-minute call cost ...

$5.50 -4.25 = $1.25

so the per-minute rate at that time is ...

$1.25/(5 min) = $0.25/min . . . . . . . . matches choice C only

You know the answer at this point, but if you want to check the rate for the first 5 minutes, you can subtract 2 minutes from the 7-minute call to find that ...

The first 5 minutes cost $4.25 - 2·0.25 = $3.75, so are charged at ...

$3.75/(5 min) = $0.75/min . . . . . . . matches choice C

5 0

3 years ago

Find the value of p for which the given pair of linear equations have infinitely many solutions for 4X + 3 Y - 4 is equals to ze

tino4ka555 [31]

Answer:

x=8/3

y= -20/9

Step-by-step explanation:

4X + 3Y -4 =0

Linear egquations must in

$x + y = 0$

so 4X + 3Y =4

THEN

3X + 9Y = - 12

next use calculator to solve it or you can use traditional way

4 0

3 years ago

What is the mean, mode, median, and range of the numbers 24, 31, 12, 38, 12, and 15

tatyana61 [14]

Answer:

mean: 19.66667

mode: 12

median: 18

range: 37

8 0

3 years ago

Margie needs to know the square footage for the first floor of the condo her client wants to make an offer on. The kitchen is 10

irga5000 [103]

Answer:

D. 850 square foot

Step-by-step explanation:

Area of a space is the length

multiply by the width

The area for the kitchen, dining, office and sunroom will be calculated independently and added together.

Note the word "and the office and sunroom are each 10 feet by 10 feet"

Kitchen area = 10 ft x 15ft= 150sqft

Living/Dining area = 20ftx25ft= 500sqft

Sunroom = 10ftx10ft= 100sqft

Office= 10ftx10ft=100sqft

Therefore total surface area is the cumulative of the 4 areas

150sqft+500sqft+100sqft+100sqft= 850sqft

8 0

3 years ago

Read 2 more answers