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3 years ago

Simplify this equation 7x+3x-10

Mathematics

1 answer:

DerKrebs [107]3 years ago

7 0

Simplify this equation 7x+3x-10:

7x + 3x - 10 = 10x - 10

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IM CONFUSED: A used car dealer has the following information for 2 months of sales:

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2 years ago

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The final scores of students in a graduate course are distributed normally with a mean of 72 and a standard deviation of 5. What

Tcecarenko [31]

Answer:

0.8041

Step-by-step explanation:

We know that

μ=72 and σ=5

and P(65<X<78)

We can determine the Z value as (X-μ)/σ

P( 65<X<78 )=P( 65-72< X-μ<78-72)

$P((65-72)/5$

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To fine the Z values:

$P (-1.4$

From the standard normal tables:

$P (Z$

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$P ( Z$

From the standard normal tables:

$P ( Z$

Therefore

$P(-1.4$

$P (65$

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3 years ago

Garrett found the slope of the values in the table: A 2-column table with 3 rows. Column 1 is labeled Years: x with entries 4, 8

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Answer:

Step-by-step explanation:

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Use the graph to solve the given system of equations, x-3y=-3 x+y=5

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Answer:

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Step-by-step explanation:

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3 years ago

Determine if the graph is a function then state the domain and range.

nignag [31]

<h3>Explanation</h3>

A function is a set of relation that doesn't have repetitive domain. If we want to know if a graph is function or not, we have to do the line test.

Line Test

Draw a vertical line. Make sure that a line passes through a graph.
See if a line intercepts a graph more than one point or just only one.

Result

If a line intercepts a graph more than one point, it is not a function.

However, if a line only intercepts a graph just one point, it is indeed a function.

The given graph from the question is a function because it passes line test.

Domain and Range

Domain is the set of all x-values, meaning we only focus on x-axis or x-value only.

Range is the set of all y-values. We only focus on y-value or y-axis for Range.

Determine Domain from Graph

We can simply say that the domain is from starting domain or x-coordinate point to end x-coordinate point. For example, if a graph starts at x = -4 and ends at x = 2, we can say that - 4<=x=2.

Determine Range from Graph

Similar to Domain except Range starts from the minimum value or point to the maximum point or value. For example if a graph starts at min point = 6 and max point = 9. We can say that 6<=y<=9.

From the graph, the domain starts from negative infinity to positive infinity. Meaning that x can be any numbers. Hence, the domain is set of all real numbers. For range, the minimum value is 0 and max value is positive infinity. Therefore we write y>=0.

<h3>Answer</h3>

 $\begin{cases} x \in \mathbb{R} \\ y \geqslant 0 \end{cases}$ 

Domain is set of all real numbers.

Range is greater or equal to 0.

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3 years ago