Answer:
<h2>y = 4</h2>
Step-by-step explanation:
Put x = 9 to the equation 3x + 4y = 43
(3)(9) + 4y = 43
27 + 4y = 43 <em>subtract 27 from both sides</em>
4y = 16 <em>divide both sides by 4</em>
y = 4
The probability of Erin not having a heart attack according to her family history would be 30%.
The probability of the test predicting correctly is 67%.
Therefore, the probability of the test correctly predicting that Erin will not have a heart attack would be (0.30)(0.67) = 0.201 or 20.1%.
To evaluate an algebraic expression, you have to substitute a number for each variable and perform the arithmetic operations. In the example above, the variable x is equal to 6 since 6 + 6 = 12. If we know the value of our variables, we can replace the variables with their values and then evaluate the expression.
Equations can be solved in several ways; one of these ways is the graphical method.
The number of commercials, x, and the number of movies, y, on which Naomi's songs were played are 5 and 2, respectively.
Let:
<em />
<em> commercials</em>
<em />
<em> movies</em>
<em />
She earned a total of $300.
This is represented as:
Her songs were played on 3 more commercials than movies.
This is represented as:
See attachment for the graphs of
From the graph, the lines of both equations intersect at:
This means that:
- <em>The number of movies is 2</em>
- <em>The number of commercials is 5</em>
<em />
<em />
Read more about linear equations at:
brainly.com/question/11897796
Answer:
2x + y = 173
Step-by-step explanation:
