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vekshin1
4 years ago
10

Why is it important to solve an equation for a specific variable

Mathematics
1 answer:
ICE Princess25 [194]4 years ago
3 0
It's important because you need to find certain numbers for different causes and also it's important because the question that you're dealing with might also ask for only one variable 

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Help help help <br><br><br><br> Help help
kipiarov [429]

Answer:

x = 2, y = 4

Step-by-step explanation:

x + \frac{3}{4} y = 5 ( multiply through by 4 to clear the fraction )

4x + 3y = 20 → (1)

x - \frac{1}{2} y = 0 ( multiply through by 2 to clear the fraction )

2x - y = 0 → (2)

Multiplying (2) by 3 and adding to (1) will eliminate y

6x - 3y = 0 → (3)

Add (1) and (3) term by term to eliminate y

10x + 0 = 20

10x = 20 ( divide both sides by 10 )

x = 2

Substitute x = 2 into either of the 2 equations and solve for y

Substituting into (1)

4(2) + 3y = 20

8 + 3y = 20 ( subtract 8 from both sides )

3y = 12 ( divide both sides by 3 )

y = 4

Solution is x = 2, y = 4

7 0
3 years ago
If a ball is thrown upward at 29.4 meters per second from the top of a building that is 80 meters high, the height of the ball c
BARSIC [14]

Answer:

<h2>124.1m</h2>

Step-by-step explanation:

29.4 per sec > Building 80m

Height = S = 4.9t^2 + 29.4t + 80

Solve for t:

t = 1.24 (approximately)

If t needed coordinates / solve using the quadratic formula:

t = (1.24 , -7.24)

<h3>The ball's maximum height is 124.1 meters.</h3>
3 0
3 years ago
Evaluate ab/2 when a is 6ft and b is 8ft
enyata [817]
1. set up and set values: 6(8)/2
2. multiply numerator: 48/2
3. divide: 24
8 0
4 years ago
I'm not sure how to start the process....
lesantik [10]
Step 1; both side divide by 4, you'll get Ix-10I=8
step 2: x-10=8 or x-10=-8
x=18 or x=2
3 0
4 years ago
What is 3 3/8 x 4 1/3 <br><br> 1: 7 1/8 <br><br> 2: 12 1/8<br><br> 3: 14 3/8<br><br> 4: 14 5/8
Alik [6]

Answer:

4 is the answer

work is shown and pictured

6 0
3 years ago
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