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kow [346]
3 years ago
5

9/4,3/8,1/3 what is the least common denominator plz show work

Mathematics
2 answers:
Alexus [3.1K]3 years ago
7 0
4, 8, and 3 must all go into the number. find the LCM(4,8) is 8. the LCM(8,3) is 24. that's your answer, 24
Dmitrij [34]3 years ago
4 0

Analyze the 3 given denominators:

4 = 2*2

8 = 2*2*2

3 = 3

The three 2's that make up 8 are part of the LCD; the other part is the 3. Thus, your LCD is 24. Thus, 9/4= 54/24; 3/8 = 9/24; and 1/3 = 8/24.


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PLZ HELP OR I FAIL MY TEST
Volgvan

Answer:

time upstream=24/8=3 hours

time downstream=24/12=2 hours

Step-by-step explanation:

If R*T=D, and R is speed + or - current, how can you find the rate without the time, and how can you find the time without the rate?

THE KEY WAS WHEN WE WERE TOLD THAT IT TAKES ONE HOUR LONGER TO GO UPSTREAM THAN DOWNSTREAM BECAUSE T=D/R AND WE ARE TOLD THAT:

D/R(Upstream) minus 1 equals D/R (DOWNSTREAM)



Let x=rate of current

distance(d)=rate(r) times time(t) or d=rt or t=d/r

distance upstream=distance downstream=24 mi

rate upstream=10-x

rate downstream=10+x

time upstream=(distance upstream)/(rate upstream)=24/(10-x)

time downstream=(distance downstream)/(rate downstream)=24/(10+x)

Now, we are told that time upstream minus one hour equals time downstream. So our equation to solve is:

24/(10-x)-1=24/(10+x) Multiply both sides by (10-x)(10+x)

24(10+x)(10-x)/(10-x)-1(10-x)(10+x)=24(10-x)/(10+x)/(10+x) clear fractions


24(10+x)-(10-x)(10+x)=24(10-x) clear parens

240+24x-100-10x+10x+x^2=240-24x subtract 240 from and add 24x to both sides

240-240+24x+24x-100+x^2=240-240-24x+24x collect like terms

x^2+48x-100=0 ----------------quadratic equation in standard form

This equation can be factored:

(x+50)(x-2)=0

x=-50 mph----------------discount the negative value for speed

and

x=2 mph----------------------speed of the current

CK

10-x=10-2= 8 mph -----------------------speed upstream

10+x=10+2=12 mph--------------------------speed downstream

time upstream=24/8=3 hours

time downstream=24/12=2 hours

so 3-2=1----takes 1 hour longer upstream

7 0
3 years ago
Selma spent
Taya2010 [7]

Answer:

30%

Step-by-step explanation:

Selma spent 3/10 of her allowance on a new backpack.

Hence, the percent of her allowance that she spent is calculated as:

Fraction of allowance spent on Backpack × 100

= 3/10 × 100

= 0.3/1 × 100

= 30%

Therefore, Selma spent 30% of her allowance on a new backpack.

8 0
3 years ago
Find the product.<br><br> 2a2(5b2+3ab+6a+1)<br><br> PLEASE HELP!!!! ASAP!!!
Anon25 [30]

Answer:

10a^{2} b^{2} +6a^{3} b+12a^{3} +2a^{2}

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
What is the value of y in the equation 9 + y = 8? this is extremely time sensitive
adoni [48]

You have to switch the 8 to the left and the y to the right which would change the equation to 9-8=y

y=1

5 0
3 years ago
Read 2 more answers
Help Please!!<br> What is the value of a?<br><br> Enter your answer in the box.<br><br> a =
Talja [164]

Answer:

a=15

Step-by-step explanation:

By pythagoras' theorem

25²=20²+a²

625=400+a² group like terms

a²=625-400

a²=225

\sqrt{a {}^{2} }  =  \sqrt{225}

therefore a=15

6 0
3 years ago
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