All categories

3 years ago

One third of a number is 15 less than five sixths of the number. Find the number.

Mathematics

2 answers:

leva [86]3 years ago

4 0

N/3=5n/6 -15

2n/6=5n/6-90/6

2n=5n-90

3n=90

n=30

levacccp [35]3 years ago

3 0

1/3(x) = 5/6(x) - 15
2/6(x) = 5/6(x) - 15
15 = 1/2(x)
x=30

You might be interested in

What number is 25 percent of 400

kaheart [24]

25 percent of 400= 100

8 0

3 years ago

Read 2 more answers

Find the measure of the indicated angle to the nearest degree

shutvik [7]

$\cos \theta =\dfrac{18}{23}\\\\\implies \theta = \cos^{-1}\left(\dfrac{18}{23} \right)=38.5^{\circ} \approx 39^{\circ}$

7 0

2 years ago

Which presents the value of c

Tems11 [23]

Answer:

It's choice 2. c = 3 sin 45 / sin 40.

Step by-step explanation:

m< A = 180 - 45-95

= 180 - 140

= 40 degrees.

So by the Sine Rule:

c / sin 45 = 3 / sin A

Cross multiply:

c sin A = 3 sin 45

c = 3 sin 45 / sin 40.

8 0

3 years ago

Read 2 more answers

Math problem plz help

Firlakuza [10]

Answer:

5/2 x 1/2

Step-by-step explanation:

when you multiply fractions you multiply trait across meaning you do 5*1 and 2*2 which leaves you with 5/4 and that is equivalent to 1 &1/4

5 0

3 years ago

At a competition with 5 runners

ankoles [38]

Answer:

B: Permutation; Number of ways = 60

Step-by-step explanation:

First we have to decide if this is a problem of permutation or combination. The rule is:

If the order matters, permutations will be used
If order does not matter, combinations will be used

In this problem, they order of awarding the medals matters, so this is a permutation problem.

We have to award 3 medals among 5 runners. So this can be done in 5P3 ways:

$nPr=\frac{n!}{(n-r)!}\\ \\ so\\ \\ 5P3=\frac{5!}{(5-3)!}=60$

Therefore, there are 60 ways to award the medal. Therefore, the correct answer is B.

5 0

3 years ago

Read 2 more answers