Nick is solving the equation 3x^2=20-7x with the quadratic formula

Mathematics

1 answer:

krek1111 [17]3 years ago

6 0

Answer:

C. a = 3

b = 7

c = -20

Step-by-step explanation:

x = -b+/- (sq) b^2 - 4ac.

Well the way to plug the numbers in is by using this equation: Ax^2 + Bx + C = 0

S if you use your equation : 3x^2 = 20 - 7x

First you have to move everything to one side.

So it'll look like this:

3x^2 = 20 - 7x

-20 -20

3x^2 - 20 = -7x

+7x +7x

3x^2 - 20 + 7x = 0

don't forget that... Ax^2 +Bx+ C= 0

3 = A

7 = B

-20 = C

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Denise is designing the seating arrangement for a concert an outdoor theater. To give everyone a good view, each row must have 6

vesna_86 [32]

This is an Arithmetic Progression with 1st term 11 and common difference d=6

Number of Rows Number of seats    Common difference " d"
----------------------- ----------------------- -------------------------------------
1st    a₁ = 11
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The data to represent average test scores for a class of 16 students includes an outlier value of 78. If the mean, including the

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Answer:

Given that The data to represent average test scores for a class of 16 students includes an outlier value of 78.

We can find sum of all 16 test scores = 84(16) = 1344

Outlier found = 78

If outlier is removed new sum = 1344-78 = 1266

Number of entries without outlier = 15

New average = 1266/12 =84.4

We find that average of new data increases.