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saul85 [17]
2 years ago
11

7th grade math question please help me?!

Mathematics
1 answer:
topjm [15]2 years ago
3 0

Answer:

D

Step-by-step explanation:

Since X's are also 3 and constants are also 3 so it makes up the equation

3x+3

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PLEASE HELP!! Compare & Contrast how Completing the Square is used to Convert a quadratic function to vertex form with how i
Likurg_2 [28]

Answer:

Step-by-step explanation:

Given a general quadratic formula given as ax²bx+c = 0

To generate the general formula to solve the quadratic equation, we can use the completing the square method as shown;

Step 1:

Bringing c to the other side

ax²+bx = -c

Dividing through by coefficient of x² which is 'a' will give:

x²+(b/a)x = -c/a

- Completing the square at the left hand side of the equation by adding the square of half the coefficient x i.e (b/2a)² and adding it to both sides of the equation we have:

x²+(b/a)x+(b/2a)² = -c/a+(b/2a)²

(x+b/2a)² = -c/a+(b/2a)²

(x+b/2a)² = -c/a + b²/4a²

- Taking the square root of both sides

√(x+b/2a)² = ±√-c/a + b²/√4a²

x+b/2a = ±√(-4ac+b²)/√4a²

x+b/2a =±√b²-4ac/2a

- Taking b/2a to the other side

x = -b/2a±√√b²-4ac/2a

Taking the LCM:

x = {-b±√b²-4ac}/2a

This gives the vertex form with how it is used to Solve a quadratic equation.

7 0
3 years ago
Bianca bought 3 pounds of hard candies at the candy store if each pound of hard candy cost $2.90 and she paid with a twenty doll
Ksivusya [100]

Answer:

11.30$

Step-by-step explanation:

8 0
2 years ago
A local nursery sells a large number of ornamental trees every year. The owners have determined the cost per tree C for buying a
Karo-lina-s [1.5K]

The minimum cost is achieved when 150 trees are produced giving a minimum cost of $27.5

Polynomial is an expression that involves the <em>operations of addition, subtraction, multiplication of variables.</em>

Let C represent the cost for buying and caring for n trees. Given that:

C = 0.001n² - 0.3n + 50.

The minimum cost is at dC/dn = 0, hence:

dC/dn = 0.002n - 0.3

0.002n - 0.3 = 0

0.002n = 0.3

n = 150

C(150) = 0.001(150)² - 0.3(150) + 50 = 27.5

The minimum cost is achieved when 150 trees are produced giving a minimum cost of $27.5

Find out more at: brainly.com/question/25836610

8 0
3 years ago
Ay help its easy pleaseeee.
pickupchik [31]

Answer:

425ft.

Step-by-step explanation:

Just add 395 and 30 together.

Hope this helps. Pls give brainliest!

5 0
2 years ago
Read 2 more answers
Mrs. Music bought a dress priced at $98.00. If the sales tax is 6%, what is the total amount she paid for the dress?
daser333 [38]

Answer: $103.88

Step-by-step explanation:

98*0.06=5.88 <--- total tax charged

98+5.88=103.88 <--- add tax to price

7 0
3 years ago
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