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iogann1982 [59]

3 years ago

12

You are flipping two standard coins.One coin is red and the other is blue.What is the probability of getting heads on the red co

in and heads on the blue coin?
a.1/2
b.3/2
c.1/3
d.1/4

2 answers:

Lesechka [4]3 years ago

8 0

I’m pretty sure the answer is d

Nimfa-mama [501]3 years ago

3 0

I Believe the answer is B

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The price of the book is $4. which expression can be used to show how much money the library will make if it sells 289 books

kogti [31]

If 1 book costs $4 then 289 books will make 289 times as much
so...
(price of book) x (number of books sold) = (amount of money made)
in this case...
4 x 289 = 1156

4 0

3 years ago

How much is 1.3+1=10

sergejj [24]

The answer is 2.3≠10 hope this helped

4 0

4 years ago

Simplify by combining like terms: -5x - 13 + 7y + 26x *

sergeinik [125]

Your answer will be 21x+7y-13

8 0

3 years ago

An aircraft seam requires 22 rivets. The seam will have to be reworked if any of these rivets is defective. Suppose rivets are d

SpyIntel [72]

Answer:

Part A:

$p=0.0095$

Part B:

$p=0.0043$

Step-by-step explanation:

Part A:

The number of rivets=22 rivets

Probability that no rivet is defective= (1-p)^22

The probability that at least one rivet is defective=1-(1-p)^22

For 19% of all seams need reworking, probability that a rivet is defective is given by:

$1-(1-p)^{22}=0.19$

$(1-p)^{22}=0.81\\p=1-\sqrt[22]{0.81} \\p=0.0095$

Part B:

For 9% of all seams need reworking, probability of a defective rivet is:

$1-(1-p)^{22}=0.09\\p=1-\sqrt[22]{0.91} \\p=0.0043$

5 0

3 years ago

first number plus twice a second number is 8. Twice the first number plus the second totals 31. Find the number

ryzh [129]

Answer:

1st number = 18

2nd number = -5

Step-by-step explanation:

Let x be first number and y be the 2nd number.

We have been given that first number plus twice a second number is 8. We can represent this information as:

$x+2y=8...(1)$

We are also given that twice the first number plus the second totals 31. We can represent this information as:

$2x+y=31...(2)$

Now let us solve our system of equations using substitution method.

From equation (1) we will get,

$x=8-2y$

Substituting $x=8-2y$ in equation (2) we will get,

$2(8-2y)+y=31$

$16-4y+y=31$

$-4y+y=31-16$

$-3y=15$

$y=\frac{15}{-3}$

$y=-5$

Therefore, the second number is -5.

Now let us substitute y=-5 in equation (1).

$x+(2*-5)=8$

$x-10=8$

$x=8+10$

$x=18$

Therefore, the first number is 18.

4 0

3 years ago