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laila [671]
3 years ago
14

You look behind the stove and discover a slice of bread that you misplaced several weeks ago. Needless to say, it is covered wit

h mold. Since the mold started growing, the area it has covered has doubled each day. By the end of the 8th day, the entire surface of the bread is covered. When was the bread half-covered with mold?
Mathematics
1 answer:
Licemer1 [7]3 years ago
8 0

Answer:

On the 7th day.

Step-by-step explanation:

The mold doubles, so on the 7th day, the mold would be half-there.

I used the 8th day's description to figure this out.

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You need 250 mL of a 90% alcohol solution. On hand, you have a 75% alcohol mixture. How much of the 75% alcohol mixture and pure
stich3 [128]

9514 1404 393

Answer:

  • 100 mL of 75% solution
  • 150 mL of pure alcohol

Step-by-step explanation:

Let x represent the quantity (in mL) of pure alcohol needed for the mix. Then the amount of 75% needed is (250-x). The amount of alcohol in the mixture is ...

  1.00x +0.75(250 -x) = 0.90(250)

  0.25x +187.5 = 225 . . simplify

  0.25x = 37.5 . . . . . . . . subtract 187.5

  x = 150 . . . . . . . . . . . . . divide by 0.25

  (250 -x) = 100 . . . . mL of 75% solution

You need 100 mL of the 75% solution and 150 mL of pure alcohol to obtain the desired mixture.

8 0
3 years ago
Ronald wants to rent a car to take a trip and has a budget of $60. There is a fixed rental fee of $25 and a daily fee of $5. Wri
Westkost [7]
Daily fee: 5x
rental fee: 25
budget:60

5x + 25 <= 60
7 0
2 years ago
Read 2 more answers
What does 10 x 5 equal?
andriy [413]
I think it should be 50, really sorry if it wasn't multiplying. 

7 0
3 years ago
Read 2 more answers
The function FX = 1/x is not an example of a rational function.<br> A. True<br> B. False
Thepotemich [5.8K]

Answer:

false

Step-by-step explanation:

3 0
3 years ago
Can you guys please help me? This is due tomorrow, thanks so much​
wariber [46]

Answer:

<em>Graph given in </em><em>Question 18</em><em> is </em><em>a function</em><em> and the graph given in </em><em>Question 19</em><em> is </em><em>not a function</em><em>. Just check the </em><em>attached figure.</em>

Step-by-step explanation:

From the given graph of a relation, it is easy to establish whether the given relation is a function or not. In order to determine the nature of the relation, there is vertical line test. This test can be done by drawing any vertical line crossing the graph of the given relation. This vertical line has a constant x -a line having constant x.

If this vertical line crosses the graph multiple times, then we can determine that the relation would not be a function. It means the graph contains multiple values of y for a single value of x. This violates the condition of a relation to be a function. Hence, the relation would not be a graph.

But, if the vertical line crosses the graph only one time, then we can determine that the given relation would be a function. It means the graph does not contain multiple values of y for a single value of x.

<em>Solution of the Graph given in Question 18:</em>

From the given graph of a relation, that sounds like a circle. It means the relation shown in current graph is not a function. The reason is simple. If we draw a vertical line, then the line would cross the graph twice. Hence, the given graph of a relation is not a function.

Just check that the value of x=1 will have two y values i.e (1, 5) and (1, -1). Also, at origin, for a value of x = 0, there are multiple values of y. Hence, the graph is not a not a function, but just a relation. Just check the <em>attached  figure.</em>

<em>Solution of the Graph given in Question 19:</em>

From the given graph of a relation, it is clear that the graph is a function. The reason is simple. If we draw a vertical line, then the line would cross the graph only one time. Hence, the given graph of a relation is a function.

Just check that the points (0, 0), (2, 3), (-1, 3), (-3, 3) and (1, -3) all make a function as each input value yields an exactly one output function. Hence, the given graph of the relation is a graph. Just check the <em>attached  figure.</em>

<em>Keywords: function, relation, ordered pairs, graph, vertical line test</em>

<em>Learn about the graph functions from brainly.com/question/4708956</em>

<em>#learnwithBrainly</em>

4 0
3 years ago
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