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Luba_88 [7]
3 years ago
6

Unit test

Mathematics
1 answer:
Orlov [11]3 years ago
5 0

Answer:

<u>19 minutes</u>

Step-by-step explanation:

We should know that:  1 minute = 60 seconds

∵ It takes Andrew 720 seconds to take a shower

   converting to minutes ⇒∴ 720 seconds  = 720/60 = 12 minutes

He spends an additional 420 seconds eating breakfast.

converting to minutes ⇒∴ 420 seconds  = 420/60 = 7 minutes

So, The time taken for a shower and eat breakfast = 12 + 7 = 19 minutes

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Consider the quadratic equation x? = 4x - 5. How many solutions does the equation have? A The equation has one real solution. Th
anzhelika [568]

Answer:

{-1, 5} (two real solutions).

Step-by-step explanation:

On the left side we want x^2, not x?

We need to rewrite x? = 4x - 5 in standard form, that is, as a quadratic with x terms in decreasing powers of x:

x^2 - 4x + 5 = 0

This factors easily to (x - 5)(x + 1) = 0.

We let each factor equal zero (0) separately and solve for x:  

{-1, 5} (two real solutions).

4 0
3 years ago
Write 8/6 as a fraction with a denominator of 3
Lyrx [107]
4/3 is your answer because if you simplify 8/6 by dividing both the numerator and the denominator by 2, you will get 4/3.

Also, if you want a mixed number, it is 1 1/3.

Hope this helps!
8 0
4 years ago
Hi<br> Someone that is able to do it
VARVARA [1.3K]
I think it’s b

Not for sure but it makes the most sense
8 0
3 years ago
Which statements are true about the graph?
lianna [129]

Answer: The graph shows exponential decay

              The graph shows y = 2^x reflected over the y-axis

Step-by-step explanation:

When<u> 0<b<1 </u>, the graph shows <u>exponential decay</u>. In this case, b was equal to 1/2 as shown by the graph alongside the question. Therefore, the graph shows exponential decay.

The graph of y = 2^x would show a reflection of y = 1/2 ^x over the y-axis, therefore the graph shows <u>y = 2^x reflected over the y-axis</u>.

8 0
3 years ago
Read 2 more answers
1 - 3/10 Write the answer as a fraction​
IgorLugansk [536]

Answer:

7/10

Step-by-step explanation:

Get a common denominator

1 - 3/10

10/10 - 3/10

7/10

6 0
3 years ago
Read 2 more answers
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