1. y=6
2. y=-12
Step-by-step explanation:
<u>1) If y varies inversely as x, and y=3 as x = -2, find y for the x value of -1.</u>
It is given that
y varies inversely as x
IT will be written as:
y∝1/x
Removing the proportionality symbol
y=k/x
Given
y=3 , x=-2
Putting the values
3=k/-2
k=3*-2 = -6
The equation will be:
y=-6/x
So,
When x=-1
<u>2) If y varies directly as x, and y=15 as x=-3, find y for the x value of 4</u>
y is directly proportional to x
y∝x
y=kx
Given
y=15, x=-3
Putting the values
Hence,
1. y=6
2. y=-12
Keywords: Proportion, Variation
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Answer:
12 people
Step-by-step explanation:
9 divided by 3/4= 12
Answer:
23
Step-by-step explanation:
F=(9/5)c + 32
F=(9/5)(-5) + 32
F=(-9) + 32
F=23
Answer: Midpoint= -13/2, -4
Step-by-step explanation:
Midpoint formula is (X1+X2)/2, (Y1+Y2)/2
So.
1. (-7+(-6))/2, (-7+(-1))/2
2. That equals -13/2,-4
See explanation for the incorrect step.
Step-by-step explanation:
The steps for solving simultaneous equations by elimination method are;
- Naming the equations (i) and (ii)
- Multiplying each equation by a suitable number so that the two equations have the same leading coefficients
- Subtracting the second equation (ii) from the first equation (i)
- Solving the new equation for value of x or y
- Substituting the value of x or y in equation (i) or (ii)
- Getting the solutions
In this case, the equations are;
5x+3y=5-------------- (i)
8x+2y=6-------------- (ii)
--------------multiplying equation (i) by 2 and (ii) by 3
10x+6x=10
24x+6y=18
-------------------performing subtraction
14x=8 --------divide both sides by 14 to remain with x
14x/14 =8/14
x=8/14 = 4/7
Substitute value of x in equation (i)
5(4/7) +3y =5
20/7 +3y =5 -------collect like terms
3y= 5- 20/7
3y=15/7
y=5/7
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Elimination Method :brainly.com/question/11962747
Keywords: system, equations,elimination method, incorrect,step,solution
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