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2 years ago

Could use help on this please. No wrong answers! I NEED to get an A on this otherwise I'll have to literally repeat the year.

Mathematics

1 answer:

iris [78.8K]2 years ago

8 0

Answer:

blank 1: 0.75b

black 2: 2/5p

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Determine the next step for solving the quadratic equation by completing the square.

Studentka2010 [4]

Answer:

The solutions are $x=\frac{1+\sqrt{7}}{2}$ and $x=\frac{1-\sqrt{7}}{2}$

Step-by-step explanation:

we have

$0=-2x^{2}+2x+3$

Group terms that contain the same variable, and move the constant to the opposite side of the equation

$-3=-2x^{2}+2x$

Factor the leading coefficient

$-3=-2(x^{2}-x)$

Complete the square. Remember to balance the equation by adding the same constants to each side.

$-3-0.5=-2(x^{2}-x+0.5^{2})$

$-3.5=-2(x^{2}-x+0.5^{2})$

Rewrite as perfect squares

$-3.5=-2(x-0.5)^{2}$

$7/4=(x-0.5)^{2}$

square root both sides

$x-0.5=(+/-)\sqrt{\frac{7}{4}}$

$x-\frac{1}{2}=(+/-)\frac{\sqrt{7}}{2}$

$x=\frac{1}{2}(+/-)\frac{\sqrt{7}}{2}$

$x=\frac{1+\sqrt{7}}{2}$

$x=\frac{1-\sqrt{7}}{2}$

4 0

3 years ago

(5x+1)3=15x3 que Propiedad pertenece

Aneli [31]

Answer:

Step-by-step explanation:

1) Reagrupar términos.

3(5x + 1) = 15x^3

2) Divide ambos lados por tres.

5x + 1 = 5x^3

3) Mueva todos los términos a un lado.

5x + 1 - 5x^3 = 0

4) No se encontró ninguna raíz algebraicamente. Sin embargo, las siguientes raíces se encontraron por métodos numéricos.

x=−0.878886,−0.209148,1.088033

6 0

2 years ago

Leslie is buying books for her upcoming semester. The cost for books is $240 and sales tax is 6%. What is the total cost of the

hodyreva [135]

Answer:

$254.40

Step-by-step explanation:

3 0

3 years ago

How many groups of 10 in 100?

PSYCHO15rus [73]

Answer:

10.

Step-by-step explanation:

You get this answer by doing 10 x 10, which is 100.

10 groups of 10 in 100.

3 0

3 years ago

Read 2 more answers

Jackie has 1 6/12 pitchers of fruit juice. She and her friend drink 4/12 of a pitcher. How much fruit does Jackie have left?

goldfiish [28.3K]

Answer:

$1\frac{1}{6}\ pitchers\ of\ fruit\ juice$

Step-by-step explanation:

we know that

To find out how much fruit Jackie has left, subtract 4/12 from 1 6/12.

Convert mixed number to an improper fraction first

$1\frac{6}{12}=\frac{1*12+6}{12}=\frac{18}{12}\ pitchers\ of\ fruit\ juice$

$\frac{18}{12}-\frac{4}{12}=\frac{14}{12}\ pitchers\ of\ fruit\ juice$

convert to mixed number

$\frac{14}{12}=\frac{12}{12}+\frac{2}{12}=1\frac{1}{6}\ pitchers\ of\ fruit\ juice$

6 0

3 years ago