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zvonat [6]
3 years ago
14

Still struggling with this.

Mathematics
1 answer:
Dominik [7]3 years ago
6 0

Answer:

22

Step-by-step explanation:

You add up the value of each X and you get a final answer of 22. Have a great day!

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Find the following product.<br> (4a +6) (3a? - 3a+6)<br> (4a + 6) (3a2- 3a +6) =
katen-ka-za [31]

Answer:

12a^3+6a^2+6a+36

Step-by-step explanation:

Sana makatulong!

3 0
3 years ago
Alex and Bryan are giving an exam. The probability Alex gets an A is 0.9, the probability Bryan gets an A is 0.8 and the probabi
VARVARA [1.3K]

Answer:

The probability that either Alex or Bryan get an A is 0.9

Step-by-step explanation:

Before we proceed to answer, we shall be making some important notation;

Let A = event of Alex getting an A

Let B = event of Bryan getting an A

From the question, P(A) = 0.9, P(B) = 0.8 and P(A ∩ B^{c} ) = 0.1

We are to calculate the probability that either Alex or Bryan get an A which can be represented as P(A ∪ B)

We can use the addition theorem here;

P(A ∪ B) = P(A) + P(B) - P(A ∩ B)  .......................(i)

Also,

P(A) = P(A ∩ B^{c} )  +   P(A ∩ B)   .........................(ii)

We can insert ii into i and we have;

P(A ∪ B) =  P(A ∩ B^{c} )  +   P(A ∩ B)  + P(B) - P(A ∩ B) =   P(A ∩ B^{c} ) + P(B) = 0.1 + 0.8 = 0.9

5 0
3 years ago
Phil can paint the garage in 12 hours and Rick can o it in 10 hours. If they work together for 3 hours and then Phil leaves, how
daser333 [38]

Answer:

It will take 4.5 hours for rick to complete the job.

Step-by-step explanation:

Given:

Time taken by Phil to paint the garage = 12 hours.

It means that for each hour he does =  \frac{1}{12}of the job.

.

Time taken by Rick to paint the garage = 10 hours.

It means that for each hour he does = \frac{1}{10} of the job

.

If they work together for 3 hours,

Phil does job in 3 hrs =  3\times\frac{1}{12} = \frac{1}{4}=0.25

Rick does job in 3 hrs =  3\times\frac{1}{10} = \frac{3}{10}=0.3

.

So in three hours of working together job done = 0.3+0.25 = 0.55

.

This means job of the painting entire garage have been done 0.55 of it.

1 - 0.55 = 0.45.

So  there is 0.45 job left

At this point Phil quits and Rick presses on by himself. Since he does 1/10 of the garage every hour

Let T represents the time that Rick needs to complete the job after Phil leaves.

Hence, \frac{1}{10}\times T= 0.45\\\\T = 0.45 \times 10\\T =4.5 hrs

Hence it will take rick 4.5 hours to complete the remaining job.

5 0
3 years ago
X2 can be combined with X?
natulia [17]

Answer:

Your first instinct might be to go ahead and add the x terms together, BUT this would be a bad thing to do! You cannot combine the x2 and 2x, because the first term has an exponent (2) and the second one does not have an exponent; therefore, you cannot add them together!

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Can some one solve this
alex41 [277]

Answer:

J Monica is right

Step-by-step explanation:

Add three to both sides, divide by 4 you get x\geq4

6 0
3 years ago
Read 2 more answers
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