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Mumz [18]
2 years ago
7

Solve the equation 7/z-1 = 9/z+4

Mathematics
1 answer:
algol [13]2 years ago
3 0

Answer:

z is equal to 18.5

Step-by-step explanation:

When an equation is in the format a/b = c/d, the quickest way to simplify it is to cross multiply.  Each side is multiplied by the other sides denominator, eliminating the division:

\frac{7}{z-1} = \frac{9}{z + 4}\\7(z + 4) = 9(z - 1)\\7z + 28 = 9z - 9\\7z - 9z = -9 - 28\\-2z = -37\\z = 37/2\\z = 18.5

So z is equal to 18.5

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Please please help me.I am so lost with this math
Arte-miy333 [17]

Answer:

6\sqrt{5}

Step-by-step explanation:

In any right triangle, the Pythagorean theorem states:

a^2+b^2=c^2, where a and b are two legs of the triangle and c is the hypotenuse.

Plugging in given values, we have:

12^2+VU^2=18^2,\\144+VU^2=324,\\VU^2=180,VU=\sqrt{180}=\sqrt{36}\cdot \sqrt{5}=\boxed{6\sqrt{5}}

4 0
3 years ago
Elija, Emily, Edward, and Esme each drew a conclusion about the figure below.
Anvisha [2.4K]
I think the answer is D all of the above
5 0
3 years ago
Upon hitting a bat, a baseball has a change in momentum of 16.5 kg-ms. What is the average
olya-2409 [2.1K]

Answer:

The average force applied to the baseball is 8.25kN

Step-by-step explanation:

This problem bothers on the impulse of a force

We know that the change in momentum is expressed as

Ft= mv-mu

Given

Ft=16.5 kg-ms

Time t of impact =0.00200s

The force applied can be solved for

By making F subject of formula

F= (mv-mu)/t

F=16.5/0.002

F= 8250N

F= 8.25kN

4 0
3 years ago
A square root function has both x and y intercepts.
Nata [24]

Step-by-step explanation:

Square Root:

The equation will never touch the x - axis or the y - axis,so the function does not have an x - or y- intercept. ...Therefore,the x- and y- intercepts are 0.

I hope it's helpful!

8 0
2 years ago
What dose 9m = 4m +35 equal?​
Umnica [9.8K]

Answer:

m=7

Step-by-step explanation:

9m=4m+35

move variable to the left

9m-4m=35

collect like terms

5m=35

divide both sides by 5

m=7

7 0
3 years ago
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