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Llana [10]
3 years ago
9

I need help with 20 and 21

Mathematics
1 answer:
7nadin3 [17]3 years ago
6 0
Https://us-static.z-dn.net/files/d63/6f064638901e33bea26f4fc25a74aa69.jpg

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-0.312 as a fraction in simplest form
Black_prince [1.1K]

Answer:

It's -39/125

Step-by-step explanation:

Rewrite the decimal number as a fraction with 1 in the denominator

Multiply to remove 3 decimal places. Here, you multiply top and bottom by 103 = 1000

Find the Greatest Common Factor (GCF) of 312 and 1000, if it exists, and reduce the fraction by dividing both numerator and denominator by GCF = 8

Therefore

X=39/125

In conclusion,

−0.312=−39/125

4 0
3 years ago
Read 2 more answers
Diego inicia un viaje por carretera de 12 horas con la batería de su teléfono al 75%. Dado su uso normal, ¿su teléfono durará to
faltersainse [42]

Based on Diego's normal usage of his phone, if the battery is at 75%, the phone will not last the whole trip.

<h3>How long will the phone battery last?</h3>

First find out how long each percentage of battery life lasts:

= 15 / 100

= 0.15 hours

If Diego is going on a 12 hour trip with 75%, the length of time it would last is:

= 0.15 x 75

= 11.25 hours

This is less than the 12 hours required so the phone will not last the whole trip.

Rest of question:

At 100%, the battery can go for 15 hours.

Find out more on rate of use at brainly.com/question/16140581.

#SPJ1

3 0
2 years ago
The coordinates of the vertices of ΔPQR are (–2, –2), (–6, –2), and (–6, –5).
melamori03 [73]
<h3>Answer:</h3>

Yes, ΔPʹQʹRʹ is a reflection of ΔPQR over the x-axis

<h3>Explanation:</h3>

The problem statement tells you the transformation is ...

... (x, y) → (x, -y)

Consider the two points (0, 1) and (0, -1). These points are chosen for your consideration because their y-coordinates have opposite signs—just like the points of the transformation above. They are equidistant from the x-axis, one above, and one below. Each is a <em>reflection</em> of the other across the x-axis.

Along with translation and rotation, <em>reflection</em> is a transformation that <em>does not change any distance or angle measures</em>. (That is why these transformations are all called "rigid" transformations: the size and shape of the transformed object do not change.)

An object that has the same length and angle measures before and after transformation <em>is congruent</em> to its transformed self.

So, ... ∆P'Q'R' is a reflection of ∆PQR over the x-axis, and is congruent to ∆PQR.

6 0
3 years ago
The function f(a) 260 - 55x represents the distance, in miles, remaining on a trip x hours
belka [17]

Answer:

260 - 55(3)

55(3)

260 - 165

= 95

Step-by-step explanation:

8 0
3 years ago
25% of what number equals 9?
astraxan [27]

Answer:

36

Step-by-step explanation:

25% × ? = 9

? =

9 ÷ 25% =

9 ÷ (25 ÷ 100) =

(100 × 9) ÷ 25 =

900 ÷ 25 =

36

5 0
3 years ago
Read 2 more answers
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