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Contact [7]
3 years ago
6

Is .21 (with only the one repeating) a rational number? please explain why! thanks!

Mathematics
1 answer:
Nostrana [21]3 years ago
8 0

21 is a rational number because it is an integer, which can be converted into a fraction.

<u>Step-by-step explanation:</u>

When a denominater and numerator are integers and gives a quotient then it is a rational number.

21/1, where 21 is denominator and 1 is numerator the quotient is 21. Therefore 21 is a rational number which can also be considered as a ratio.

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What is an equation of the line that passes through the point (- 7, 0) and is parallel to the line x + y = 1
sweet [91]

Answer:

y = -x - 7

Step-by-step explanation:

If two lines are parallel to each other, they have the same slope.

The first line is x + y = 1.

First, let's put this into standard form.

x + y = 1

y = -x + 1

Now we have an equation in standard form. Its slope is -1. A line parallel to this one will also have a slope of -1.

Plug this value (-1) into your standard point-slope equation of y = mx + b.

y = -x + b

To find b, we want to plug in a value that we know is on this line: in this case, it is (-7, 0). Plug in the x and y values into the x and y of the standard equation.

0 = -1(-7) + b

To find b, multiply the slope and the input of x (-7)

0 = 7 + b

Now, subtract 7 from both sides to isolate b.

-7 = b

Plug this into your standard equation.

y = -x - 7

This equation is parallel to your given equation (y = -x + 1) and contains point (-7, 0)

Hope this helps!

7 0
3 years ago
Find the difference of 2 3/8 - 5/8
vodka [1.7K]

Answer:1/8

Step-by-step explanation:

3 0
3 years ago
Tickets to a school play cost $2 if bought in advance and $3 at the door. By selling all 400 tickets, $1030 was collected. First
Marrrta [24]

Answer:

170 tickets.

Step-by-step explanation:

Write formulas for the question.

N_2+N_3=400

2N_2+3N_3=1030

Then use substitution.

N_2=-N_3+400

2(-N_3+400)+3N_3=1030

-2N_3+800+3N_3=1030

N_3=230

So number of $3 tickets sold is 230. But they ask for the tickets bought in advance (i.e. the tickets sold for $2). Use substitution again.

N_2+230=400\\N_2=400-230\\N_2=170

6 0
3 years ago
Drag each tile to the correct box.
ad-work [718]

Answer:

the first one first the second second and the last last

Step-by-step explanation:

2 1/5 + 22/5 = 4 2/5

9 2/5 + (-5 3/5)= 4 1/5

-8 2/5+9 1/5=1/15

8 0
3 years ago
Read 2 more answers
24 pennies 62 nickels 55 dimes 16 quarters and 19 fifty cent pieces how much money do i have
777dan777 [17]
24 = 24 cents. 62 nickels= multiply that by 5. 55 dimes= multiply that by 10. 16 quarters= multiply that by 25. 19 x 50 add together all solutions.
8 0
4 years ago
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