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Lelu [443]
3 years ago
12

I attached a photo for this question

Mathematics
1 answer:
klasskru [66]3 years ago
4 0

Answer:

In order to prove that these numbers are all rational, you must be able to express then as a fraction, \frac{a}{b}, where b ≠ 0.

Firstly, in order to turn 3 into a fraction, remember that any number divided by 1 is 0. Therefore, 3 as a fraction can be expressed as \frac{3}{1}.

This satisfies the criteria: A fraction in the form \frac{a}{b}, where b ≠ 0.

Next, -2. Same with 3, any number over itself is 1. -2 as a fraction is -\frac{2}{1}. This, again, satisfies the given definition for a rational number.

Now, the more challenging one, -0.75.

It is likely a commonly known fact that 0.75 is equal to three quarters, but I will show the formal way to convert decimals to fraction, just in case in the future there is some other confusing decimal that isn't that commonly seen.

For terminating decimals (ones that do not go on forever), you can simply put it over 1, then multiply it by 100:

-0.75

= -\frac{0.75}{1}

Multiply that by 100:

-\frac{75}{100}

We could simplify this fraction further, but that is enough to show that -0.75 is a rational number: it fits the given definition!

I hope this helps you out! If you still have any questions, you can reply to this answer :)

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Find the value of y in the solution to the system of equations shown.<br> y= 12x+7<br> y=-6x+25
padilas [110]

Answer:  The required value of y is 19.

Step-by-step explanation:  We are given to find the value of y in the solution to the following system of equations :

y=12x+7~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)\\\\y=-6x+25~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(ii)

Comparing equations (i) and (ii), we get

12x+7=-6x+25\\\\\Rightarrow 12x+6x=25-7\\\\\Rightarrow 18x=18\\\\\Rightarrow x=\dfrac{18}{18}\\\\\Rightarrow x=1.

From equation (i), we get

y=12\times1+7=12+7=19.

Thus, the required value of y is 19.

4 0
3 years ago
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18) How many points are on this plane?<br> A.1<br> B.6<br> C.5 <br> D.7
alexgriva [62]
B right? sorry if i’m wrong i’m not the greatest at math english is my subject
8 0
3 years ago
Please help me (with explanation if possible)
nekit [7.7K]

Answer:

French=60,History=120,Music=108

Step-by-step explanation:

I think this is trying to represent the degrees of a pie chart.

To find the degree of the pi chart per person you need to 72/12=6

Than to find the amount of degrees per subject multiply 6*amount of students.

Example:

6 \times amoumt \: of \: students \:taking \: music = 6 \times 18 = 108

7 0
3 years ago
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What is 8×∙(−7)∙3 = Because I need it right now for my HOMEWORK, so if you know the answer please tell me what it is.
Romashka [77]

Answer:

-168

Step-by-step explanation:

8 × -7 × 3

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-168

3 0
3 years ago
Caden exercises daily by walking on a treadmill. He sets the machine so that he will walk at a steady rate of 3.6 miles per hour
babunello [35]

Answer:

a) d = 3.6t

b) 10.8 miles

c) 1.2 hours

Step-by-step explanation:

For part a:

Slope of a line: y = mx + b

In this case, the equation would be: d = mt,

where m represents the speed Caden is walking at.

Note: b = 0 in this case because when Caden starts walking on the treadmill, he hasn't really covered any distance yet.

Therefore, plugging in a speed of 3.6 miles per hour, the equation is:

d = 3.6t

For part b:

This is a simple instance of plugging in 3 hours for our t value.

Therefore, d = 3.6 (3)

d = 10.8 miles

For part c:

In this case, we are given that d = 4.32 miles.

Therefore, 4.32 = 3.6t

Dividing both sides by 3.6, we get

t = 1.2 hours

5 0
3 years ago
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