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habsofarah0
05.08.2020 •
Mathematics
Can someone please help me with this question?
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Ответ:
B
Step-by-step explanation:
11q + 5 ≤ 49
Subtract 5 from each side
11q + 5-5 ≤ 49-5
11q ≤44
Divide each side by 11
q ≤44/11
q≤4
There is a close circle at 4 because of the equals sign and the lines goes to the left
Ответ:
B
Step 1:
To solve this, we need to isolate the variable q. To do so, we will subtract 5 from both sides of the inequality.
Step 2:
We divide both sides by 11 to get our q.
q ≤ 4
Step 3:
To find the correct graph, we need to know that a close circle means a ≤ or ≥ and an open one means a < or >. Here, we are using a ≤ so C and D are not our answers. Also remember that if the "arrow" is pointing left (<), then the arrow on the graph should be facing the left side. If the arrow is facing the right side, then that means we are using > or ≥. Here, we are using ≤ (left), so that means the arrow on the graph should be on a 4, facing left, with a closed circle.
Our answer is B.
Ответ:
Average cost of the painting = $14.55
Step-by-step explanation:
According to the question:
Number of brushes used =Total cost of brushes =![(4\times 0.75) =\$3](/tpl/images/0551/7367/7b9c3.png)
Note:Total cost of any item = Product of number of items with its unit price.
Number of canvases =Total cost of canvases =![(3\times 5.99)=\$17.97](/tpl/images/0551/7367/3dbf3.png)
Number of tubes used =Total cost of tubes =![(12\times 1.89)=\$22.68](/tpl/images/0551/7367/9a016.png)
Number of paintings =We have to find the average cost of painting.
Let the average cost be 'x' .
So,
⇒![x=\frac{Total\ expenditure}{Number\ of\ paintings}](/tpl/images/0551/7367/77dbc.png)
⇒![x=\frac{3+17.97+22.68}{3}](/tpl/images/0551/7367/dc506.png)
⇒![x=\$14.55](/tpl/images/0551/7367/151a9.png)
Average cost of the painting = $14.55