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1 year ago

Use a fraction or mixed number to represent the time on a number line. Let 0 represent noon.

Mathematics

1 answer:

tigry1 [53]1 year ago

8 0

The time 8:30AM is 3 and half hours before noon.

The fraction that represents 8:30AM is -3 1/2

<h3>How to represent the time as fraction?</h3>

The time is given as:

Time = 8:30 A.M

Given that Noon is represented by 0.

It means that time before noon would be represented with negative value

8:30AM is 3 and half hours before noon.

So, we have:

8:30AM = -3 1/2

Hence, the fraction that represents 8:30AM is -3 1/2

You might be interested in

Which is a factor of the polynomial f(x) = 6x4 – 21x3 – 4x2 + 24x – 35?

QveST [7]

<span>I note that this problem starts out with "Which is a factor of ... " This implies that you were given several answer choices. If that's the case, it's unfortunate that you haven't shared them.

I thought I'd try finding roots of this function using synthetic division. See below:

f(x) = 6x^4 – 21x^3 – 4x^2 + 24x – 35
Please use " ^ " to denote exponentiation. Thanks.

Possible zeros of this poly are factors of 35: plus or minus 1, plus or minus 5, plus or minus 7. Use synthetic division; determine whether or not there is a non-zero remainder in each case. If none of these work, form rational divisors from 35 and 6 and try them: 5/6, 7/6, 1/6, etc.

Provided that you have copied down the function
</span>f(x) = 6x^4 – 21x^3 – 4x^2 + 24x – 35 properly, this approach will eventually turn up 1 or 2 zeros of this poly. Obviously it'd be much easier if you'd check out the possible answers given you with this problem.

By graphing this function, I found that the graph crosses the x-axis at 7/2. There is another root.

Using synth. div. to check whether or not 7/2 is a root:

___________________________
7/2 / 6 -21 -4 24 -35
21 0 -14 35
----------- ------------------------------
6 0 -4 10 0

Because the remainder is zero, 7/2 (or 3.5) is a root of the polynomial. Thus, (x-3.5), or (x-7/2), is a factor.

7 0

2 years ago

Read 2 more answers

Point m is the midpoint of ab¯¯¯¯¯ . am=3x+3, and ab=8x−6. what is the length of am¯¯¯¯¯¯ ?

LuckyWell [14K]

As given m is a midpoint of ab. So am is half of ab.

So we can write

$am = \frac{ab}{2}$

As given am = 3x+3 , ab = 8x - 6.

So $3x+3 = \frac{8x - 6}{2}$

$3x+3 = \frac{2(4x - 3)}{2}$

$3x+3 = 4x - 3$

$3+3 = 4x - 3x
$

$6 = x$

So x = 6.

So length of am = 3x+3 = 3*6 + 3 = 21

5 0

3 years ago

Find the sum of -75 and 105

GuDViN [60]

Answer:

Step-by-step explanation:

-75 + 105= 30

(Hope this helps can I pls have brainlist (crown) ☺️)

3 0

2 years ago

Read 2 more answers

Solve the inequality 2x - 5 \le -x +12. Give your answer as an interval.

ludmilkaskok [199]

Answer: $\begin{bmatrix}\mathrm{Solution:}\:&\:x\le \frac{17}{3}\:\\ \:\mathrm{Decimal:}&\:x\le \:5.66666\dots \\ \:\mathrm{Interval\:Notation:}&\:(-\infty \:,\:\frac{17}{3}]\end{bmatrix}$

Step-by-step explanation:

$2x-5\le \:-x+12$

$2x\le \:-x+17\\$

$2x+x\le \:-x+17+x$

$3x\le \:17$

$\frac{3x}{3}\le \frac{17}{3}$

$x\le \frac{17}{3}$

6 0

2 years ago

Out of 30 questions, Ahmad answer 12 of them incorrectly. What percent of the questions did he answer correctly?

kati45 [8]

First, you would need to determine how many questions he got correct.
30 - 12 = 18

Next, you would need to create an equation for this problem. Let x represent the unknown percentage.
$\frac{18}{30}$ = $\frac{x}{100}$

Now, you would cross multiply.
30x = 1,800

The last step would be to isolate the x. To do this, you would divide both sides of the equal sign by 30.
x = 60

Ahmad got 60% of the questions correct.

I hope this helps!

7 0

2 years ago