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Evgesh-ka [11]
3 years ago
14

URGENT 30 POINTS An engineer needs to find the length of a beam to support the beam holding the wall. If the two beams are perpe

ndicular to one another, and a=4 m and b=1 m, find z. Give your answer to one decimal place.

Mathematics
1 answer:
alexandr402 [8]3 years ago
5 0
The answer is not m= 95.
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If 4 dice are rolled, what is the number of ways in which at least 1 die shows 3?
UkoKoshka [18]

I think the number of ways is 671?

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3 years ago
F:[1/2,infinity)—&gt;[3/4,infinity) <br> f(x)=x^2-x+1 <br> find the inverse of f(x);please explain
dexar [7]

Answer:

f^{-1}(x)=\frac{1}{2}+\sqrt{x-\frac{3}{4}}

Step-by-step explanation:

y=x^2-x+1

We want to solve for x.

I'm going to use completing the square.

Subtract 1 on both sides:

y-1=x^2-x

Add (-1/2)^2 on both sides:

y-1+(-1/2)^2=x^2-x+(-1/2)^2

This allows me to write the right hand side as a square.

y-1+1/4=(x-1/2)^2

y-3/4=(x-1/2)^2

Now remember we are solving for x so now we square root both sides:

\pm \sqrt{y-3/4}=x-1/2

The problem said the domain was 1/2 to infinity and the range was 3/4 to infinity.

This is only the right side of the parabola because of the domain restriction. We want x-1/2 to be positive.

That is we want:

\sqrt{y-3/4}=x-1/2

Add 1/2 on both sides:

1/2+\sqrt{y-3/4}=x

The last step is to switch x and y:

1/2+\sqrt{x-3/4}=y

y=1/2+\sqrt{x-3/4}

f^{-1}(x)=1/2+\sqrt{x-3/4}

8 0
2 years ago
Solve The Equation -3x+7=-2
Svetradugi [14.3K]

Subtract 7 from -2 and 7 since 7 is currently a positive number

Your equation should now look like this:

-3x=-9

Next you have to divide by 3 on each side to get:

X=3



7 0
3 years ago
Read 2 more answers
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tino4ka555 [31]

answer

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hope it  helps

Step-by-step explanation:

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2 years ago
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A student states that the constant of proportionality is 2.5 since 10 - 7.5 = 2.5.
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I cannot see the table. But if I could that would be helpful.

But, if you were to look at the table see if the numbers are increasing or decreasing for the y column. Once you figure this out, find out how much the numbers are increasing/decreasing by and that should be the answer for the constant of proportionality. If it is decreasing, it would be a negative number. If it is increasing, it would be a positive number.
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