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Juliette [100K]
3 years ago
7

Find a rational number that is between 7.7 and 7.9. Explain why it is rational.

Mathematics
2 answers:
Cerrena [4.2K]3 years ago
6 0
7.8 is rational because it can be written as a fraction with integer numerator and denominator (39/5) and it is also a terminating decimal :))
QveST [7]3 years ago
3 0

Answer:

One rational number can be 7.8

It is rational because it has terminating decimal expamsion

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Plzzzzzzzzzzzzzzzzzzzzzzzz
lesantik [10]

Answer:

10x^2-11x-6

Step-by-step explanation:

To expand, we use the FOIL method. You do this by multiplying each number inside the parenthesis by the other numbers in the other set of the parenthesis. For example, on this problem, you would multiply 5x by 2x, and then 5x by -3.

Step by step, you would:

5x * 2x = 10x^2

5x * -3 = -15x

2 * 2x = 4x

2 * -3 = -6

In an equation, it would expand to 10x^2-15x+4x-6

To simplify, you add like terms (constants and those with the same variable). In this case, you would add together all the terms ending in x.

-15x+4x=-11x

Now, you have added like terms together, so your simplified answer is 10x^2-11x-6.

6 0
2 years ago
If the coordinates of point a are -3 and 2 and the coordinates of point B are 7 and 6 the x-intercept of CD is what
AveGali [126]

Answer:

The x-intercept of CD is -19/5

Step-by-step explanation:

If the coordinates of the first point is (-3, 2) and the coordinates of the point B are (7, 6) then we need first to find the equation of the line CD:

We know that the general equation of the line is:

y-y0 = m(x-x0) where (x0, y0) represents a point that belongs to the line and m, is the slope which can be calculated by using the following formula:

m = (x1 - x0) / (y1 - y0)

In this case:

(x1, y1) = (7, 6)

(x0, y0) = (-3, 2)

Then:

m = (7 - (-3))/(6-2) = 10/4 = 5/2.

Then, the equation of the line is:

y-y0 = m(x-x0)

y - 2 = 5/2 (x -(-3))

y = 5/2(x+3) + 2

To find the x intercept we make y=0.

Then y = 5/2(x+3) + 2 = 0

Then:

x = -4/5 - 3 = -19/5

3 0
3 years ago
Find the height of a paralleogram, if its area is 84square inches, its base is 12 inches, and its height is respresented by x +
Ghella [55]
Hope you are having clear concept on this.

4 0
3 years ago
Read 2 more answers
Which expression is 8y - 5x + 13y equivalent to after being simplified?
Thepotemich [5.8K]
You combine like terms like 8y+13y which gives you 21y and don't forget the -5x so your simplified equation would end up being A. 21 - 5x
7 0
3 years ago
Simplify: (14y+x) +22y=??
PtichkaEL [24]

Answer:

x+36y

Step-by-step explanation:

i did it and got a 100%

5 0
2 years ago
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