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Serggg [28]
3 years ago
6

Is this relations a function? Justify your answer. ​

Mathematics
2 answers:
castortr0y [4]3 years ago
6 0

Answer:

lets gooo

Step-by-step explanation:

n200080 [17]3 years ago
4 0

Answer:

A

Step-by-step explanation:

There need to be more matching points, but there aren't, therefore, its A

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Solve the question: (-4)+(-1)+2+5+...+x=437
Alex Ar [27]
The sequence is an arithmetic sequence with
a₁ = -4

d = a₂ - a₁
d = -1 - (-4)
d = -1 + 4
d = 3

an = x

Sn = 437


General formula in arithmetic sequence
Formula to find nth term
an = a₁ + d(n - 1)
Formula to find sum of sequence (sn)
Sn = n/2 (a₁ + an)

We have to make an equation system based on the problem
plug the numbers into the formula
First equation
an = a₁ + d(n - 1)
x = -4 + 3(n - 1)
x = -4 + 3n - 3
x = 3n - 7

Second equation
Sn = n/2 (a₁ + an)
n/2 (a₁ + an) = 437
n/2 (-4 + x) = 437
n(x -  4) = 874
xn - 4n = 874

Solve the equation system by subtitution method
Subtitute x with 3n - 7 in the second equation
xn - 4n = 874
(3n - 7)n - 4n = 874
3n² - 7n - 4n = 874
3n² - 11n - 874 = 0
(3n + 46)(n - 19) = 0
n = -46/3 or n = 19
Because the number of terms shouldn't be negative, -46/3 isn't required, so the value of n is 19.

Solve for x, back to the first equatin
x = 3n - 7
x = 3(19) - 7
x = 57 - 7
x = 50

The solution is 50
6 0
3 years ago
you made a 75, 80, 85,and 86 so far on your test. what grade do you need to make on the next test in order to have an 85 average
Nikitich [7]
You'd have to get atleast a 99%
6 0
3 years ago
Help!!!!!! red car travels 17 2/5 miles useing 0.75 of gas. please answer today
Nataliya [291]

I think you just divide

7 0
3 years ago
Find the value of x.<br> 1680<br> x = [? ]°
lapo4ka [179]
Please mark brainliest

x= 192

Explanation: the circle is 360 in total so subtract 168 from 360
4 0
3 years ago
The distance from the Earth to Saturn averages 886 million (886,000,000) miles. Write this number in scientific notation.
kiruha [24]

Answer:

8.86 x 10^8

Step-by-step explanation:

Scientific notation means that you represent the standard form of a number like this:

number less than ten x 10 to the ___ power

In standard form, the decimal point is at the end of 886,000,000.

You have to move the decimal point to the left until it creates a number less than 10, but greater than 1:

8.86,000,000

You count how many decimal places you moved it. In this case, it is 8.

So your answer becomes 8.86 x 10^8

7 0
3 years ago
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