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leva [86]
2 years ago
13

Which of the following is equivalent to 3+6/2+1?

Mathematics
1 answer:
denis-greek [22]2 years ago
6 0

Answer:

(D) (3+6)/(2+1)

Step-by-step explanation:

You might be interested in
the basketball coach is selecting from nine starters who will be the first three batters how many different batters lineups can
Sav [38]

We know that

• The total is nine starters.

,

• The coach wants to choose three.

Given that the player cannot include repetition, we solve this problem as a combination because the order does not matter.

C^r_n=\frac{n!}{r!(n-r)!}

Where n = 9, and r = 3. Let's replace these values.

C^3_9=\frac{9!}{3!(9-3)!}=\frac{9!}{3!\cdot6!}=\frac{9\cdot8\cdot7\cdot6!}{3\cdot2\cdot1\cdot6!}=\frac{504}{6}=84<h2>Hence, there are 84 different ways to choose the first three.</h2>
8 0
1 year ago
Solve the following system by the substitution method.<br>1/4x+2/3y=-17/4<br>3x-y=3
madam [21]
3x - y = 3.....3x - 3 = y

1/4x + 2/3(3x - 3) = -17/4
1/4x + 2x - 2 = -17/4 ...multiply everything by 4
x + 8x - 8 = -17
9x = -17 + 8
9x = - 9
x = -1

3x - y = 3
3(-1) - y = 3
-3 - y = 3
-3 - 3 = y
-6 = y

solution is (-1,-6)
6 0
3 years ago
One half of the birds at the pet store are yellow. Tara buys one of the yellow birds. Then one third of the birds at the store a
Viktor [21]
Well, y=ny
2(y-1)=ny
(where ny is not-yellow)
You get y=2y-2 or y=2. You had two yellow birds and two other types.
3 0
3 years ago
Read 2 more answers
I think it's either C or D but I'm not sure plzzz help me !?!?!?!
Dennis_Churaev [7]
Using th epythagorean theorem.

52^2-48^2= x^2

2704-2304= x^2

400=x^2

x=20

Final answer: D
3 0
3 years ago
In a race between 18 people, how many ways can the top 5 finishers be arranged?
snow_lady [41]

Answer:

Step-by-step explanation:

This is permutation, since order matters.  The formula for us is

₁₈P₅ = \frac{18!}{(18-5)!} which simplifies to

₁₈P₅ = \frac{18*17*16*15*14*13!}{13!}

The factorial of 13 cancels out on the top and bottom leaving you with

₁₈P₅ = 18 × 17 × 16 × 15 × 14

which comes to 1,028,160 ways

Another way to look at it is:  the first 5 people of 18 finish and the others you don't care about.  Once the first place person is first, there are only 4 of the 18 left to finish in second place.  Then there are only 3 left to finish in third place, etc.  So if we use that reasoning, we don't even need to use the formula, we can just say

18 * 17 * 16 * 15 * 14 and those are the first 5 people of 18 to finish.

8 0
3 years ago
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