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liubo4ka [24]
2 years ago
13

Avery has four cards numbered one, two, three and four. She chooses two cards without replacement. What is the probability of bo

th cards being evens?
Mathematics
1 answer:
igomit [66]2 years ago
8 0

Answer:

2/7 or 2:7

Step-by-step explanation:

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Plzzzzz help,.............
mafiozo [28]
With what? Maybe I can help
5 0
3 years ago
Veronica is saving money to by a saddle for her horse that costs 175 . She plans to save $10 the first month and then increased
Anon25 [30]
You will start off with $175-$10=$165. Then you will take your $165 and divide by $15 to get the answer. $165÷$15=11 months to save the money.
6 0
3 years ago
?<br> 5 in<br> Q 2 in R<br> PQ =
777dan777 [17]

Answer:

What is your specific question regarding Pq?

Step-by-step explanation:

4 0
2 years ago
Given: 1; -5; -13 ; -23 ; ...<br><br> Derive a formula for the nth term in the pattern.
mylen [45]

Answer:

  f(n) = -n^2 -3n +5

Step-by-step explanation:

Suppose the formula is ...

  f(n) = an^2 +bn +c

Then we have ...

  f(1) = 1 = a(1^2) +b(1) +c

  f(2) = -5 = a(2^2) +b(2) +c

  f(3) = -13 = a(3^2) +b(3) +c

__

Here's a way to solve these equations.

Subtract the first equation from the second:

  -6 = 3a +b . . . . . 4th equation

Subtract the second equation from the third:

  -8 = 5a +b . . . . . 5th equation

Subtract the fourth equation from the fifth:

  -2 = 2a

  a = -1

Then substituting into the 4th equation to find b, we have ...

  -6 = 3(-1) +b

  -3 = b

and ...

  1 = -1 +(-3) +c . . . . . substituting "a" and "b" into the first equation

  5 = c

The formula is ...

  f(n) = -n^2 -3n +5

3 0
3 years ago
Please help me its about Solving by substitution
Vera_Pavlovna [14]

Answer:

x=-2 y=3

Step-by-step explanation:

The substitution is basically given to you. Exchange x from the second equation with y-5

Once that is done and you combine the parentheses you get:

2y-10+y=-1

Add 10 on both sides of the equal sign

You get:

3y=9

Divide both sides by 3

You get:

y=3

To check your work you can substitute y in the second equation with 3 and solve it that way to get x=-2 (x equals negative two)

3 0
2 years ago
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