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diamong [38]
4 years ago
14

Is x = 3 a solution of the equation 3x − 5 = 4x − 9? Explain.

Mathematics
1 answer:
Vika [28.1K]4 years ago
5 0

Answer:

no because on is equal to 3 when plugged in and the other is equal to 4 when plugged in.

Step-by-step explanation:

3(3)-5=4\\4(3)-9=3

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Reserve Problems Chapter 4 Section 5 Problem 2 A laptop company claims up to 10.1 hours of wireless web usage for its newest lap
Viktor [21]

Answer:

0.1151

Step-by-step explanation:

Given that a laptop company claims up to 10.1 hours of wireless web usage for its newest laptop battery life. However, reviews on this laptop shows many complaints about low battery life. A survey on battery life reported by customers shows that it follows a normal distribution with mean 9.5 hours and standard deviation 30 minutes.

If X is the battery life then X is N(9.5, 0.5)

(we convert into one unit for calculations purpose here hours)

a) the probability that the battery life is at least 10.1 hours

=P(X\geq 10.1)\\=P(Z\geq \frac{10.1-9.5}{0.5} )\\= P(Z\geq 1.2)\\=0.1151

we get the probability that the battery life is at least 10.1 hours is 0.1151

4 0
3 years ago
The point (-3, 2) is translated 2 units to the left and 7 units up. what are the new coordinates​
shtirl [24]

Answer:

(-5, 9)

Step-by-step explanation:

(-3-2, 2+7)= (-5,9)

5 0
3 years ago
Help me please i have a 63 in math :( if you can then please add my insta so you can help. it is manny._.memes2.0_
DerKrebs [107]

Answer:I believe this is a demonstartion of the communitive property the equation backwards is the right5 awnser

Step-by-step explanation:

8 0
4 years ago
(52) Pleaase check ym answer
Alinara [238K]
X = measure of each of the legs
"perimeter is 8 more than 2 times one of the legs" ---> P = 2x+8
P = 28 is the given perimeter

So,
P = 2x+8
28 = 2x+8
2x+8 = 28
2x = 20
x = 10

If x = 10, then the two legs add up to x+x = 10+10 = 20
Leaving P-20 = 28-20 = 8 inches left over for the base

You have the correct answer (choice D, 8 inches) though your steps are a bit confusing at some parts. Such as the part where you wrote 2x = 10 twice. I think I know what you were trying to say. 

4 0
3 years ago
Plz help will give brainly
Lesechka [4]

Answer:

1.  A. (3,-2)

2. D. (-4,3)

3. (4,-2)

4. B. 3 cars

5. B. -10x7y2

Step-by-Step Explanation:

1. Graph the problem next time and to solve it, you just write the point where the intersect.

2. Write the second equation into the first one by substituting the y with the second equation: -3x-3(-5x-17)=3

3. Tbh its easier to just graph this one too and find the intersect point.

4. After reading the problem you should come up with the equations 5x+45y=195 and x+y=7 with x representing the number of cars and y representing the number of buses. All you have to do is substitute them into each other like in problem 2.

5. Multiply 12 and -5/6, then multiply the variables x^4 with x^3 y^2. All you have to do is add the exponent numbers together.

4 0
4 years ago
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