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3 years ago

14

a 6lb watermelon costs $2.40 before a 30% discount. Which equation would allow you to find the discounted price of the watermelo

n?

1 answer:

ycow [4]3 years ago

5 0

The answer should be 1.68

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Drag a statement or reason to each box to complete this proof.<br><br><br><br> If 4x+5=17, then x=3.

natita [175]

Statement Reason

1) 4x + 5 = 17 Given

2) 4x + 5 - 5 = 17 - 5 Subtraction property of equality

3) 4x = 12 Simplifying

4) 4x/4 = 12/4 Division property of equality

5) x = 3 Simplifying

6 0

3 years ago

Read 2 more answers

What’s the domain and range of this graph?

avanturin [10]

Given:

The graph of a downward parabola.

To find:

The domain and range of the graph.

Solution:

Domain is the set of x-values or input values and range is the set of y-values or output values.

The graph represents a downward parabola and domain of a downward parabola is always the set of real numbers because they are defined for all real values of x.

Domain = R

Domain = (-∞,∞)

The maximum point of a downward parabola is the vertex. The range of the downward parabola is always the set of all real number which are less than or equal to the y-coordinate of the vertex.

From the graph it is clear that the vertex of the parabola is at point (5,-4). So, value of function cannot be greater than -4.

Range = All real numbers less than or equal to -4.

Range = (-∞,-4]

Therefore, the domain of the graph is (-∞,∞) and the range of the graph is (-∞,-4].

3 0

2 years ago

V = r + at, solve for a

erica [24]

$V = r + at\\\\
at=V-r\\\\
a=\dfrac{V-r}{t}$

8 0

3 years ago

An automotive manufacturer wants to know the proportion of new car buyers who prefer foreign cars over domestic. Step 2 of 2 : S

ziro4ka [17]

Answer:

The 85% onfidence interval for the population proportion of new car buyers who prefer foreign cars over domestic cars is (0.151, 0.205).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

For this problem, we have that:

Sample of 421 new car buyers, 75 preferred foreign cars. So $n = 421, \pi = \frac{75}{421} = 0.178$

85% confidence level

So $\alpha = 0.15$ , z is the value of Z that has a pvalue of $1 - \frac{0.15}{2} = 0.925$ , so $Z = 1.44$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.178 - 1.44\sqrt{\frac{0.178*0.822}{421}} = 0.151$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.178 + 1.44\sqrt{\frac{0.178*0.822}{421}} = 0.205$

The 85% onfidence interval for the population proportion of new car buyers who prefer foreign cars over domestic cars is (0.151, 0.205).

8 0

2 years ago

Write an equation of the line passing through the points (3,9) and (-1,- 15).

marishachu [46]

Step 1: Find the slope.
Step 2: Find the value of b.
Step 3: Get the y=mx+b

8 0

2 years ago