1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Hitman42 [59]
2 years ago
9

If y=2x^2-5x-3 find the value of y if x= -1​

Mathematics
1 answer:
Gelneren [198K]2 years ago
8 0

Answer:

y = 4

Step-by-step explanation:

First we want to raise -1 to the power of 2

y = 2 * 1 - 5 * -1 - 3

Multiply

2 - 5 * -1 - 3

Multiply

y = 2 + 5 - 3

y = 7 - 3

y = 4

You might be interested in
The number of patients treated at Dr. Artin’s dentist office each day was recorded for nine days. These are the data: 6, 6, 6, 5
klemol [59]

Answer:

D) 5.6, 6, 6, 1

Step-by-step explanation:

Before we start solving this problem, we need to first rearrange the provided data from smallest to greatest, so we get:

5, 5, 5, 5, 6, 6, 6, 6, 6

now we can find the mean. The mean is nothing but the average of the provided values, so we need to add them and then divide them into the total amount of data:

mean=\frac{5+5+5+5+6+6+6+6+6}{9}=5.6

next, in an odd number of data, the median is the middle number when written in order. In this case the middle number (the one in the position 5) is 6, so:

median=6

the mode will tell you what is the value that has the greatest number of occurrencies. This is the number that appears the most on our list.

Mode=6

and the range is the difference between the greatest value and the smallest value:

Range=6-5=1

so the answer is D.

6 0
3 years ago
Can someone help me with this question​
Doss [256]

Answer:

Step-by-step explanation:

For any prism or cylinder for that matter, you can find the volume by multiplying the area of the base times the height.  So this problem just becomes simple algebra.

B * h = V

25 * h = 80

h = 80/25

h = 3.2

If you don't get why it's the area of the base let me know and I can try to explain it.  

4 0
3 years ago
Which expression is equivalent to
viva [34]

Answer:

C) x^{27} (\sqrt[3]{y} )

Step-by-step explanation:

8 0
3 years ago
Is 0.67 a real number
kkurt [141]

Answer:

no

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
If a concrete column is 6 inches by 6 inches square and 8 ft. long, calculate its weight in Newtons, given a specific weight of
tangare [24]
<h2>Weight of column is 555.83 N</h2>

Step-by-step explanation:

Size of column = 6 inch x 6 inch x 8 ft

Size of column = 0.5 ft x 0.5 ft x 8 ft

Volume of column = 0.5 x 0.5 x 8 = 2 ft³

Specific weight of concrete = 62.4 lb/ft³

Mass = Volume x Specific weight

Mass = 2 x 62.4

Mass = 124.8 lb = 124.8 x 0.454 = 56.66 kg

Weight = 56.66 x 9.81 = 555.83 N

Weight of column is 555.83 N

7 0
3 years ago
Other questions:
  • 6(2x+4)=4(3x+6) solve and show work
    9·1 answer
  • What is the answer to the question -4•-10
    13·1 answer
  • Kylee is managing a small theme park and has been analyzing the attendance data. Kylee has found that the number of visitors inc
    12·2 answers
  • What is the median of the set of numbers ? 82, 79 ,72, 72, 81, 77 , 69
    7·1 answer
  • Solve for x...<br><br> Z = 8(x-h) <br><br> X = ????<br><br> Please state what X is...
    5·2 answers
  • Find the sum of the numbers as the product of their GCF and another sum. 35 + 49
    15·1 answer
  • Can someone help me with this... also can you do this on paper...
    12·2 answers
  • 85,985 rounded to the nearest ten thousand.
    15·2 answers
  • What angle is congruent to ∠C?
    15·1 answer
  • PLEASE HELP NO BOTS!
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!