MATHEMATICS COLLEGE

Which algebraic expression has a term with a coefficient of 9? O A. 6(x + 5) O B. 6x - 9 O C. 6+ x - 9 O D. 9x=6​

Answers

Answer 1
Answer:

Answer:

D is the answer to your question

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-7x = -28solving one step equations show your work

{2x
x = -6y
12x + 12y = 0
Solve the system of equations.

Answers

Answer:

The solution to the system of equations is:

x=0,\:y=0

Step-by-step explanation:

Given the system of equations

2x = -6y

12x + 12y = 0

solving the system of equations by elimination method

\begin{bmatrix}2x=-6y\n 12x+12y=0\end{bmatrix}

Arrange equation variables for elimination

\begin{bmatrix}2x+6y=0\n 12x+12y=0\end{bmatrix}

Multiply 2x+6y = 0 by 6:   12x+36y=0

\begin{bmatrix}12x+36y=0\n 12x+12y=0\end{bmatrix}

subtracting the equations

12x+12y=0

-

\underline{12x+36y=0}

-24y=0

solve -24y=0 for y

-24y=0

divide both sides by -24

(-24y)/(-24)=(0)/(-24)

Simplify

y=0

For 12x+36y=0 plug in y = 0

12x+36y=0

12x+36\cdot \:0=0

12x+0=0

12x=0

Divide both sides by 12

(12x)/(12)=(0)/(12)

Simplify

x=0

Therefore, the solution to the system of equations is:

x=0,\:y=0

wo cards are selected from a standard deck of 52 playing cards. The first card is not replaced before the second card is selected. Find the probability of selecting a nine and then selecting an eight. The probability of selecting a nine and then selecting an eight is nothing.

Answers

Answer:

0.6%

Step-by-step explanation:

We have a standard deck of 52 playing cards, which is made up of 13 cards of each type (hearts, diamonds, spades, clubs)

Therefore there are one nine hearts, one nine diamonds, one nine spades and one nine clubs, that is to say that in total there are 4. Therefore the probability of drawing a nine is:

4/52

In the second card it is the same, an eight, that is, there are 4 eight cards, but there is already one less card in the whole deck, since it is not replaced, therefore the probability is:

4/51

So the final probability would be:

(4/52) * (4/51) = 0.006

Which means that the probability of the event is 0.6%

Three less than the square of the quotient of a number and five

Answers

Look for the word "Is" first - this is where your "=" goes.  (In your problem, it actually says "is equal to".)

So now you know you have = 9.

The next key word on the left is "quotient" - that means divide.  It says "quotient of a number and 5" - so we'll divide an unknown number (y in your problem) by 5.

Three less than means subtract 3 from that quotient.

So you need to start with the quotient:  y/5 - 3 = 9.

hope it helps!

One size of pizza served at Joe’s Pizza Parlor is 10in. in diameter. What is the area of this particular (circular) size pizza? (Pie=3.14)

Answers

Answer:

78.5 in.²

Explanation:

Formula For Area Of Circle: Area = πr²

π: 3.14

r (Half Of Diameter): 5

r²: 25

3.14 · 25 = 78.5

Find the slope of the line that passes through the pair of points.

(2,2) AND (-2,-2)

Answers

Answer:

the slope is 1

Step-by-step explanation:

the formula is (y1-y2)/(x1-x2)

this comes out to 4/4 which equals 1

Answer:

1

Step-by-step explanation:

by using formula

(y_2-y_1)/(x_2-x_1)=(-2-2)/(-2-2)=(-4)/(-4)=1

Twin​ brothers, Billy and​ Bobby, can mow their​ grandparent's lawn together in 53 minutes. Billy could mow the lawn by himself in 20 minutes less time that it would take Bobby. How long would it take Bobby to mow the lawn by​ himself?

Answers

5353 minutes = 89.22 hours
Maybe the figures should be 53 and 20??

Let's let Billy = A
The formula to use for work problems is
Time = (A*B) / (A+B)

53 = ( (A +20)* A) / (A +20 + A) )
53 = ( A^2 + 20A ) / (2A + 20)
A^2 + 20A -106A -1060
A^2 -86A -1060
A = 96.935
Bobby Mows in 116.935 minutes
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