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Luda [366]
3 years ago
10

This year, gasoline costs $4 per gallon. This is a 125% increase over the cost 3 years ago. What expression can be used to deter

mine the cost of gasoline three years ago?
Mathematics
1 answer:
pochemuha3 years ago
7 0

The equation would be, 4/125%.

You might be interested in
why might you want to use the commutative property to change the order of the intergers in the following sum before adding? -80+
serious [3.7K]
-80+ (-20)+(-173)=-80-20-173=-100-173=-273


6 0
3 years ago
The temperature in Bloomington on Sunday was 32.6°C. On Monday, the temperature changed by -8.25°C. What was the temperature on
Afina-wow [57]
Subtract 8.25 from 32.6 (32.6-8.25) = 24.35
8 0
3 years ago
A sample of 40 observations is selected from one population with a population standard deviation of 5. The sample mean is 102. A
marin [14]

1) This is a Two tailed Test.

2) Decision rule is; If the p-value is greater than 4% fail to reject H₀.

3) P-value = 0.00968764 and so we reject H₀

<h3>How to state the decision rule in hypothesis testing?</h3>

We are given the hypothesis as;

Null Hypothesis; H₀: m₁ = m₂

Alternative Hypothesis; H₁: m₁ ≠ m₂

1) Since the alternative hypothesis has "not equal to sign", then it is a two tailed test.

2) Since we are told to use significance level as 0.04, then we can say that the decision rule is;

If the p-value is greater than 4% fail to reject H₀.

3) Using a 2-Sample Z-Test online TI calculator gives the test statistic as;

z = 2.5868

4) From z-score calculator, p-value equals 0.00968764. This is less than 0.04 and as such the decision regarding H₀ is to reject H₀.

5) P-value = 0.00968764

Read more about decision rule in Hypothesis Testing at; brainly.com/question/17192140

#SPJ1

3 0
2 years ago
What is the vertex of the quadratic function fix=(x-8)(x-2)
VikaD [51]

Answer:

Vertex: (5, -9)

Step-by-step explanation:

fix = (x-8)(x-2)

fix = x^2 - 2x - 8x + 16

fix = x^2 - 10x + 16

a = 1, b = -10, and c = 16

To find vertex:

x = -b/2a

x = -(-10)/2(1)

x = 10/2

x = 5

y = 5^2 - 10(5) + 16

y = 25 -50 + 16

y = -9

Vertex: (5, -9)

8 0
3 years ago
Find the range, mean, median, and mode of the following data set.
attashe74 [19]

Answer:

<em>The answer to your question would be D.</em>

<em>D. Range: 20</em>

<em>Mean: 10</em>

<em>Median: 9</em>

<em>Mode: none</em>

Step-by-step explanation:

1, 2, 3, 8, 9, 12, 14, 20, 21

Range: 21 - 1 = 20

Mean: 1 + 2 + 3 + 8 + 9 + 12 + 14 + 20 + 21 = 90/9 = 10

Median: 9

Mode: there are no mode in the following given data set.

8 0
3 years ago
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