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Alenkinab [10]
3 years ago
5

8(2x+9)=56 I need some help with this I just don't get it

Mathematics
2 answers:
Pachacha [2.7K]3 years ago
8 0
Well, if you know how to find x, it's really just a matter of distributing, and then finding the value of x.

8 is outside the parentheses, and 2x and 9 are inside the parenthesis, telling us that 8 needs to be distributed to the numbers inside the parentheses. Once distributed to both numbers inside the parentheses, you would end up with : 16x + 72 = 56.

Now, there's just the matter of finding the value of x. Let's start with the numbers without any variables with them, and the side that doesn't have the answer. 72. Subtract 72 from both sides, and you're left with : 16x = -16.

We have to isolate the variable, and therefore, we would have to get rid of that 16 with it. So we divide both sides by 16. x ends up by itself, and -16 ÷ 16 is -1.

x = -1
WINSTONCH [101]3 years ago
6 0
X=-1
First, divide both sides by 8 to eliminate 8 on the left side. You should result in 2x+9=7
Second, subtract 9 from both sides, which results in 2x=-2
Third, Divide both sides by 2 and you get x=-1

Substitute -1 for x--> 8(2(-1)+9)=56 --> 8(-2+9)=56 --> 8(7)=56 --> 56=56


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A slide has a diagonal of 10 feet and covers a distance of 8 feet across the ground. How many feet high is the slide at its high
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So, this creates a triangle once again. If we imagine a slide, the slide itself would be the hypotenuse of the triangle, then if there's a ladder leading up to the slide, that would be the vertical length we're looking for. The feet across the ground would be the distance from the bottom of the slide to the bottom of the ladder.

We can use the Pythagorean theorem to find the missing side length, as this would create a right triangle. | 8^2 + b^2 = 10^2 | 64 + b^2 = 100 | b^2 = 36 | b = 6 feet | The slide is 6 feet high at its highest point.

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Sveta_85 [38]

Answer:

a. P(X=50)= 0.36

b. P(X≤75) =  0.9

c. P(X>50)=  0.48

d. P(X<100) = 0.9

Step-by-step explanation:

The given data is

x                      25        50       75        100          Total

P(x)                0.16       0.36    0.38    0.10          1.00

Where X is the variable and P(X) = probabililty of that variable.

From the above

a. P(X=50)= 0.36

We add the probabilities of the variable below and equal to 75

b. P(X≤75) = 0.16+ 0.36+ 0.38= 0.9

We find the probability of the variable greater than 50 and add it.

c. P(X>50)= 0.38+0.10=  0.48

It can be calculated in two ways. One is to subtract the probability of 100 from total probability of 1. And the other is to add the probabilities of all the variables less than 100 . Both would give the same answer.

d. P(X<100)= 1- P(X=100)= 1-0.1= 0.9

8 0
2 years ago
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