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3 years ago

Is (8,2) a solution for the system 2y=x-12

Mathematics

2 answers:

erica [24]3 years ago

4 0

I hope this helps you

Darina [25.2K]3 years ago

4 0

Hoy entro denuevo y mi pagina etsa en ingles antes salia en esppañol y teno 30 pnts :v

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John is digging a rectangular hole. The area of the rectangle is 8 square feet. John digs 4 feet down into the ground. What is t

Verdich [7]

Answer:

32 cubic feet

Step-by-step explanation:

To know the volume of a figure we have to calculate the area of its "base" and then multiply it by its height.

In this case we have a rectangular hole that has an area of 8 square feet.

As we said before:

Volume = Area x height.

If we substitute the value of the area of the rectangle and the height (or depth in this case) we would get:

Volume = 8 x 4 = 32 cubic feet.

Thus, the volume of John's hole is 32 cubic feet.

8 0

4 years ago

Read 2 more answers

I really need help here ASAP

AlexFokin [52]

Answer:

D. $x=\frac{-4-\sqrt{31}}{3}$ or $x=\frac{-4+\sqrt{31}}{3}$

Step-by-step explanation:

The given equation is:

$3x^2+8x=5$

Divide through by 3;

$x^2+\frac{8}{3}x=\frac{5}{3}$

Add the square of half the coefficient of x to both sides.

$x^2+\frac{8}{3}x+(\frac{4}{3})^2=\frac{5}{3}++(\frac{4}{3})^2$

$x^2+\frac{8}{3}x+\frac{16}{9}=\frac{5}{3}+\frac{16}{9}$

The left hand side is now a perfect square:

$(x+\frac{4}{3})^2=\frac{31}{9}$

Take square root

$x+\frac{4}{3}=\pm \sqrt{ \frac{31}{9}}$

$x=-\frac{4}{3}\pm \sqrt{ \frac{31}{9}}$

$x=-\frac{4}{3}\pm \frac{\sqrt{31}}{3}$

D. $x=\frac{-4-\sqrt{31}}{3}$ or $x=\frac{-4+\sqrt{31}}{3}$

5 0

3 years ago

Chris withdraws $7.50 per week from his savings account. After 15 weeks, the balance in the account is $585.

slava [35]

Y-585 = -7.5(x-15)

y = -7.5x - 7.5(-15) + 585
y = -7.5x + 697.50

C = -7.5(52) + 697.50 = $307.50

4 0

4 years ago

A lottery ticket which pays $1 million dollars will only cost you $1 dollar. To win a person must match 5 numbers from a total o

slavikrds [6]

The total combinations of 5 numbers that can be made from 59 numbers is:

59C5 = 5,006,386

So the probability of winning is:

P = 1 / 5,006,386

P = 1.997 x 10^-7

So the expected payoff is:

P = $1,000,000 (1.997 x 10^-7) - $1 (1 - 1.997 x 10^-7)

P = - $0.80 (loss)

D

5 0

4 years ago

At a charity fundraiser, adult tickets are sold for $12 each and children tickets are sold for $6 each. Write an algebraic expre

Annette [7]

Answer:

the answer is 2

Step-by-step explanation:

7 0

3 years ago