All categories

3 years ago

Help plz, this is due in like 4 mins

Mathematics

1 answer:

Paha777 [63]3 years ago

8 0

Answer:

I believe C is incorrect

Step-by-step explanation:

Im almost positive A and B are correct, and fairly sure about D. C is the only one that doesnt make sense, hope this helped.

You might be interested in

the tens digit of a two digit number is 5 greater the units digit. If you subtract double the reversed number from it, the resul

likoan [24]

Given:

The tens digit of a two digit number is 5 greater the units digit.

If you subtract double the reversed number from it, the result is a fourth of the original number.

To find:

The original number.

Solution:

Let n be the two digit number and x be the unit digit. Then tens digit is (x+5) and the original number is:

$n=(x+5)\times 10+x\times 1$

$n=10x+50+x$

$n=11x+50$

Reversed number is:

$x\times 10+(x+5)\times 1=10x+x+5$

$x\times 10+(x+5)\times 1=11x+5$

If you subtract double the reversed number from it, the result is a fourth of the original number.

$11x+50-2(11x+5)=\dfrac{1}{4}(11x+50)$

$11x+50-22x-10=\dfrac{1}{4}(11x+50)$

$40-11x=\dfrac{1}{4}(11x+50)$

Multiply both sides by 4.

$160-44x=11x+50$

$160-50=11x+44x$

$110=55x$

Divide both sides by 55.

$\dfrac{110}{55}=x$

$2=x$

The unit digit is 2. So, the tens digit is $2+5=7$ .

Therefore, the original number is 72.

6 0

2 years ago

A typical running track is an oval with 74-m-diameter half circles at each end. a runner going once around the track covers a di

denpristay [2]

Answer:

Her centripetal acceleration during the turn at each end of the track is $0.432\, \frac{m}{s^{2}}$

Step-by-step explanation:

Total distance covered in one round , D= 400 m

Time taken to cover one round , T = 1 min 40 s = 100 sec

Speed of runner , $V=\frac{D}{T}=\frac{400}{100}\, \frac{m}{s}= 4.0\, \frac{m}{s}$

Now centripetal acceleration is given by

$a_c=\frac{V^{2}}{R}$

where $V= 4.0\frac{m}{s}$

$Radius, R= \frac{Diameter}{2}=\frac{74}{2}m=37\, m$

$\therefore a_c=\frac{4^{2}}{37}\, \frac{m}{s^{2}}=0.432\, \frac{m}{s^{2}}$

Thus her centripetal acceleration during the turn at each end of the track is $0.432\, \frac{m}{s^{2}}$

4 0

3 years ago

Read 2 more answers

A.2.00<br>b. 2.50<br>c 5.25<br>d 10.50

klemol [59]

Answer:

the picture is blurry

Step-by-step explanation:

<h2>can. you give me another picture? plz</h2>

5 0

2 years ago

2. What is 9 squared. <br> a. 3<br> b. 81<br> C. 18<br> O d. 11

vitfil [10]

Answer:

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers

PLEASE HELP ASAP 25 PTS + BRAINLIEST OR RIGHT/BEST ANSWER

Snowcat [4.5K]

down 3 unit mean -3 outside root

right 2 unit mean -2 inside root,

so the answer is

$y = \sqrt{x - 2} - 3$

8 0

3 years ago

Read 2 more answers