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8090 [49]
3 years ago
14

Evaluate a + 4 when a = 7

Mathematics
1 answer:
aalyn [17]3 years ago
4 0
If a is equal to 7. The answer is 11. 7+4
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What is 4,7,12,19,28 in quadratic form
Naddik [55]
Asked and answered elsewhere.
brainly.com/question/9247314

You obviously don't mind using "technology" (Brainly) to answer these questions. A graphing calculator can do quadratic regression on the sequence and tell you its formula.

If you want to do it by hand, you can write the equation
.. y = ax^2 +bx +c
and substitute three of the given points. Then solve the resulting three linear equations for a, b, and c.
.. 4 = a +b +c
.. 7 = 4a +2b +c
.. 12 = 9a +3b +c

Subtracting the first equation from the other two reduces this to
.. 3 = 3a +b
.. 8 = 8a +2b
The latter can be divided by 2, so reduces to
.. 4 = 4a +b
Subtracting the first of the reduced equations from this, you have
.. 1 = a
so
.. 3 = 3*1 +b
.. 0 = b
and
.. 4 = a + b + c = 1 + 0 + c
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And your equation is
.. y = x^2 +3 . . . . . . as shown previously

7 0
3 years ago
What is the factored form for the quadratic function?
kirill115 [55]

Answer:

Step-by-step explanation:

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8 0
2 years ago
1-(1.00375) exponent-12(30)
victus00 [196]

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7 0
3 years ago
A parking garage charges $5 for the first hour of parking and $1.75 for each additional hour.If y represents the total cost and
jonny [76]
5 no mater what on first hour so, then on the second hour the 1.75 rate kicks in so  therefor when x=1, then y=5 so y=5+0 times 1.75
so y=5+1.75 times (x-1)
the naswe ris
y=1.75(x-1)+5 or d
7 0
3 years ago
Read 2 more answers
Square root of 7x times the square root of 7 root x
djyliett [7]
Square root x * square root x = square root of x^2 which is just absolute value of x which is just x.
Now you’re left with 7x square root 7

I hope this helps
8 0
2 years ago
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