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12345 [234]
3 years ago
9

Which of the following parabolas opens down?

Mathematics
1 answer:
iris [78.8K]3 years ago
4 0

Answer:

B

Step-by-step explanation:

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A company performed power tests on a set of batteries of the same type. The company 10 determined that the equation y = 100 - 8.
alexgriva [62]
For this case we have the following equation:
 y = 100 - 8.9x
 Where,
 x = the number of hours of use
 For 11 hours of use we have x = 11.
 Substituting:
 y = 100 - 8.9 * (11)
 y = 2.1%
 Answer:
 
the best prediction of the percent of remaining power for a battery after 11 hours of use is:
 
y = 2.1%
7 0
3 years ago
What is the Median of the Data Set: 2 1/2, 4 1/2, 1 3/4, 1 1/4, 2 1/2
Dominik [7]

Answer:

The median is 2 \frac{1}{2}

Step-by-step explanation:

All you had to do was line them up from lowest to highest.

5 0
3 years ago
Evaluate<br> 1.4 (2 - 4)<br><br> Enter your answer as a decimal in the box.
katen-ka-za [31]

Answer:

-2.8

Step-by-step explanation:

1.4(2-4)

1.4(-2)

=-2.8

5 0
3 years ago
Read 2 more answers
A running back is having a great day on the football field. It’s only the third quarter, and he’s already rushed for 203 yards.
Naddik [55]

Answer:

He needs to gain more than 26 yards in order to break his record

Step-by-step explanation:

Let y stand for the number of yards he’ll have to gain. The sum of y plus the number of yards he already has (203) must be greater than 229 in order for him to break the record.  

203 + y > 229                           Set up the inequality.

203 − 203 + y > 229 − 203       Subtract 203 from both sides of the inequality.

y > 26

8 0
3 years ago
Pls solve fast ! I’m begging you ! The lesson is operations on functions
Oliga [24]

Step-by-step explanation:

1a. Just add both of them.

8x - 3 + 4x + 5 = 12x + 2

1b. We just subtract both of the functions.

(8x - 3) - (4x + 5) =

4x - 8

1c.

(8x - 3)(4x + 5)

32 {x}^{2}  + 28x - 15

1d.

\frac{8x - 3}{4x + 5}  = 2 - \frac{13}{4x + 5}

3 0
2 years ago
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