A.240 B.360 C.480 D.720

What are rational numbers? Why is it important to study rational numbers?

xxTIMURxx [149]

Answer:

Any number that can be written as a fraction with integers is called a rational number . For example, 17 and −34 are rational numbers. (Note that there is more than one way to write the same rational number as a ratio of integers. For example, 17 and 214 represent the same rational number.)

3 0

3 years ago

1.) 5(X+7) is equivalent to 5(x+y). Enter the value of y if the two expressions are equivalent.

Alik [6]

Answer:

y = 7.

Step-by-step explanation:

7 is in the same place as y in the 2nd expression.

5(x+7) = 5(x+y).

Therefore, your answer is 7.

5 0

3 years ago

The area under the normal curve between z = 0 and z = 1 is __________ the area under the normal curve between z = 1 and z = 2.

Lena [83]

Answer:

greater than

hope this helps! <3

7 0

2 years ago

9. Krista and Emily wrote an equation of a line that is parallel to the line y = 3x - 1 and passing

Andre45 [30]

Step-by-step explanation:

Hey there!

The equation, of a st. line that passes through point (5,9) is,

$(y - y1) = m1(y - y1)$

Put the values,

$(y - 9) = m1(x - 5)$

It is 1st equation.

Now, another equation is,

y = 3x-1.........(ii)

Comparing the equation with y = mx+c.

Slope (m2)= 3

As per the parallel lines,

m1=m2=3

Putting,

the value of m1 in equation(i)

(y-9)= 3(x-5)

y-9= 3x - 15

y = 3x - 6.

So, Krista equation is correct.

Hope it helps...

6 0

3 years ago

Zhen is an audiobook narrator. The table gives some completed audio lengths and the amount of time Zhen spends researching, reco

mestny [16]

Answer:

c. Zhen spends 6 1/2 hours working per audiobook.

Step-by-step explanation:

The table below gives some completed audio lengths and the amount of time Zhen spends on the audiobook.

$\left|\begin{array}{c|c}$Completed length of audiobook (hours) &$Working time (hours)\\---------&--------\\1&6\frac{1}{2} \\\\3\frac{1}{2}&22\frac{3}{4}\\\\7&45\frac{1}{2}\\\\10&65\end{array}\right|$

We observe that from the table, in 6.5 hours, Zhen completes 1 audiobook.

In fact, across the table:

$\dfrac{6\frac{1}{2}}{1}=\dfrac{22\frac{3}{4}}{3\frac{1}{2}}=\dfrac{65}{10}=6\dfrac{1}{2} $ hour per audiobook$

Therefore, in this situation, 6.5 hours mean that Zhen spends 6.5 hours working per audiobook.

The correct option is C.

5 0

3 years ago

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