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4 years ago

Erica had 6 coins in her coin collection. she goes to a coin show and buys some coins. how many dose she have now?

1 answer:

3 0

Since, it is not given how many coins did Erica buy at the coin show, so, we can suppose that Erica bought "n" coins from the coin show.

Now, we know that Erica already had 6 coins in her coin collection before she went to the coin show and bought the "n" coins.

Therefore, the total number of coins that Erica will have in her possession after buying "n" coins from the coin show will be 6+n.

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here are 55 black balls and 99 red balls in an urn. If 44 balls are drawn without replacement, what is the probability that exac

ElenaW [278]

Answer:

P=0.0899.

Step-by-step explanation:

We know that are 5 black balls and 9 red balls in an urn. If 4 balls are drawn without replacement. We calculate the probability that exactly 3 black balls are drawn.

Therefore, we have 14 balls in an urn.

We calculate the number of possible combinations:

$C_4^{14}=\frac{14!}{4!(14-4)!}=1001\\$

We calculate the number of favorable combinations:

$C_3^5\cdot C^9_1=10\cdot 9=90$

Therefore, the probability is:

P=90/1001

P=0.0899.

3 0

3 years ago

Multiply.

ANTONII [103]

The multiplication of the expression (x² + 3x + 2) (2x² + 3x + 1) is 2x⁴ + 9x³ + 14x² + 9x + 2

<h3>Multiplication</h3>

(x² + 3x + 2) (2x² + 3x + 1)

= 2x⁴ + 3x³ + x² + 6x³ + 9x² + 3x + 4x² + 6x + 2

collect like terms

= 2x⁴ + 3x³ + 6x³ + x² + 9x² + 4x² + 3x + 6x + 2

= 2x⁴ + 9x³ + 14x² + 9x + 2

Learn more about multiplication:

brainly.com/question/10873737

#SPJ1

8 0

2 years ago

What is the value of the fourth term in a geometric sequence for which ay =

enot [183]

Answer:

a₄ = 1.25

Step-by-step explanation:

Given that,

First term of GP, a₁ = 10

The common ration of GP, r = 0.5

The nth term of the GP is given by :

$a_4=a_1r^{n-1}\\\\a_4=a_1r^3\\\\a_4=10\times (0.5)^3\\\\a_4=10\times 0.125\\\\a_4=1.25$

So, the fourth term of the GP is 1.25.

5 0

3 years ago

Someone please help me quick!

Inessa [10]

Can you explain the question in words please?

5 0

3 years ago

A company tests two new products to make sure they last for more than a year. Product 1 had 950 out of 1,000 test items last for

zheka24 [161]

Answer:

product one; it has a higher success rate

Step-by-step explanation:

to find out which has a higher rate of success we can find out their percentage of success

we can divide their success amounts by test amounts

950 / 1000 = 95/100 = 95%

150/200 = 75/100 = 75%

product 1 has a higher success rate

5 0

3 years ago