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Irina-Kira [14]
3 years ago
8

The table of values below represents an inverse variation relationship. what is the value of x when y= "3.25"?

Mathematics
1 answer:
joja [24]3 years ago
4 0

Answer:

3.25,

Step-by-step explanation:

no it doesnt appear to be so. I did the math it said no

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Solve the system of equations using row operations. Write your answer in the form (x, y).
Sonja [21]

Answer:

(5, - 4 )

Step-by-step explanation:

Given the 2 equations

2x + 3y = - 2 → (1)

3x - y = 19 → (2)

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

9x - 3y = 57 → (3)

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

(2x + 9x) + (3y - 3y) = (- 2 + 57), that is

11x = 55 ( divide both sides by 5 )

x = 5

Substitute x = 5 into either of the 2 equations and solve for y

Substituting into (1)

2(5) + 3y = - 2

10 + 3y = - 2 ( subtract 10 from both sides )

3y = - 12 ( divide both sides by 3 )

y = - 4

Solution is (5, - 4 )

8 0
3 years ago
Given A = 1 /2 (b1 + b2)h, solve for h.
Tatiana [17]

Answer: b: h=2a/b1+b2

Step-by-step explanation:

6 0
3 years ago
A researcher surveyed 220 residents of a city about the number of hours they
olga55 [171]

Answer:

Margin of error of 0.0485 hours.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1 - \alpha.

That is z with a pvalue of 1 - 0.025 = 0.975, so Z = 1.96.

Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

In this question:

\sigma = 0.35, n = 220

The margin of error is of:

M = z\frac{\sigma}{\sqrt{n}}

M = 1.96\frac{0.35}{\sqrt{200}}

M = 0.0485

Margin of error of 0.0485 hours.

5 0
3 years ago
Find the area of the parallelogram. The figure is not drawn to scale.
valina [46]

Answer:

1330 in.

Step-by-step explanation:

38 x 35 = 1330

3 0
3 years ago
Read 2 more answers
I need some help here
grandymaker [24]
In 1 and 2, you are asked to find "a" and "b" in the pattern
  g(x) = a•bˣ

1: selection 2
2: selection 4

3. You want the result of evaluating 4000*(1.06)⁵ ≈ 5352.90, selection 2.
3 0
3 years ago
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