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2 years ago

Leila runs 4 miles in 30 minutes. At the same rate, how many minutes would she take to run 10 miles?

2 answers:

6 0

$\bf \begin{array}{ccllll}
miles&minutes\\
\textendash\textendash\textendash\textendash\textendash\textendash&\textendash\textendash\textendash\textendash\textendash\textendash\\
4&30\\
10&x
\end{array}\implies \cfrac{4}{10}=\cfrac{30}{x}$

solve for "x"

Marizza181 [45]2 years ago

3 0

30/4=7.5. 7.5 minutes every mile... That means that she ran 75 minutes

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The question is in the picture, please help!! a. (16/7 , 6/7) b.(4 , 6/7) c.( 2 , 6/7)

lianna [129]

Answer:

b.(4,6/7)

Step-by-step explanation:

i hope i was able to help with the question

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2 years ago

A fair six sided die is rolled 1800 times, what is the theoretical probability that a 5 is rolled?

d1i1m1o1n [39]

Answer:

360 percent. 360 percent probability i think

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3 years ago

Two sides of a triangle have the same length. The third side measures 7m less that twice the common length. The perimeter of the

Firdavs [7]

As of 7 being one side, subtract it with the whole...
When you subtract you get 10
Divide by 2 (or subtract 5)

So the two other sides of the triangle is 5m

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3 years ago

Read 2 more answers

Write the polynomial in standard form. Then name the polynomial based on its degree and number of terms.

Inessa05 [86]

Hey there.

When writing a polynomial in standard form, you always want to start from the highest degree (exponent), so let's simplify our expression before doing so.

-2 $x^{3}$ + 6 $x^{3}$ = 4 $x^{3}$ ;
This number will go first as it has the highest degree.
Up next will be '-3x', as it has a degree of 1.
After this, we have 6, having a degree of 0.

Let's set up our new polynomial with this information;
4 $x^{3}$ - 3x + 6.

This is known as a cubic trinomial since it has three terms and has a degree of 3.

Your correct answer is "D.)"

I hope this helps!

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3 years ago

Read 2 more answers

If the triangles are similar, what is the value of x?

Yuri [45]

9514 1404 393

Answer:

5/9
17/90
12/45
19/66

Step-by-step explanation:

You can do these conversions the way shown in your attachment:

2) x = 0.18_8

10x = 1.88_8

9x = 1.88_8 -0.18_1 = 1.7

x = 1.7/9 = 17/90

Or, you can recognize that 0.88_8 is 8/9, but 0.088_8 is that value divided by 10: 8/90. Then 0.18_8 is 0.1 + 0.088_8 = 1/10 + 8/90 = (9+8)/90 = 17/90

Here are the others:

1) 0.5_5 = 5/9

3) 0.26_6 = 1/5 + 6/90 = (18 +6)/90 = 24/90 = 12/45

4) 0.287_87 = 1/5 + 87/990 = (198+87)/990 = 19/66

_____

Further development

You have probably figured out that a 1-digit repeat that starts at the decimal point is expressed as a fraction with that digit divided by 9.

x = 0.dd_d

10x d.dd_d

9x = d

x = d/9 . . . . . . for any single-digit repeat

Now doubt, you're used to seeing 1/3 = 0.33_3 = 3/9, and 2/3 = 0.66_6 = 6/9.

Similarly, a 2-digit repeat is the fraction with those two digits divided by 99 (an equal number of 9s). This holds for all n-digit repeats. The "raw" divisor is 10^n -1. In many cases, the fraction can be reduced, as in ...

0.142857_142857 = 142857/999999 = 1/7

When the repeating part of the decimal does not start at the decimal point, then the divisor (some number of 9s) must be adjusted by an appropriate power of 10. The non-repeating part can be expressed as a fraction in the usual way, then added to the value of the repeating part. Or, you can do the several-step process you show. Both work just fine.

_____

About notation

Overbars are difficult to show in plain text. Not all methods of creating overbars are rendered properly in documents that show plain text. In typeset text, they are used to show the repeating digits. So, other methods are sometimes used in plain text to show the repeating digits. Here are a few:

0.166_6 . . . . shows the 6 repeats

0.16(6) . . . . . shows the 6 repeats [this notation is also used to indicate error limits for the number, so can be ambiguous]

0.16... (repeating 6) . . . . . shows the 6 repeats

6 0

2 years ago