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crimeas [40]
3 years ago
13

Find the value of expression the a3−3a2+5a−7 by substituting a=3.

Mathematics
1 answer:
8090 [49]3 years ago
6 0

Answer:

21 is answer

Step-by-step explanation:

Find the value of expression the a3−3a2+5a−7 by substituting a=3.

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anonymous one year ago Andrew bought 3 baseball cards for $240. After a few months, he got an offer from his friend Jack to buy
erik [133]
The answer is 80 you divide 240.00 into 3 and get 80
4 0
3 years ago
7: Jikayla earns $19 per hour babysitting. Last week, she worked 7 hours on Monday, 6 hours on Tuesday, and 7 hours on Wednesday
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Answer:

$475

Step-by-step explanation:

7+6+7+5 = 25

25*19 = 475

6 0
3 years ago
I have a diamond problem I need 2 numbers that ?×?= -7 but it also has to
umka2103 [35]
 Multiply -1x7=-7 
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3 years ago
Read 2 more answers
Now we are testing to see whether taking a vitamin supplement each day has significant health benefits. There are no (known) har
ZanzabumX [31]

Answer:

Concluding that people should take vitamin supplement each day when they don't help.            

Step-by-step explanation:

We are given the following in the question:

Hypothesis:

Taking a vitamin supplement each day has significant health benefits and does not have any harmful side effects.

Null hypothesis:

Taking a vitamin supplement each day does not have have significant health benefits.

Alternate hypothesis:

Taking a vitamin supplement each day have have significant health benefits.

Type I error:

  • It the error of rejecting the a true null hypothesis.

So error I for this situation would be concluding that people should take vitamin supplement each day when they don't help.

3 0
3 years ago
What is the perimeter, in centimeters, of the figure
xeze [42]

Answer:

30 cm

Step-by-step explanation:

add all sides and use 7 for the bottom line because 5+2=7 and use 8 for the side because 5+3=8.

5 0
2 years ago
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