MATHEMATICS HIGH SCHOOL

9y = 423 What inverse operation do we need to use to find the value of y? y=__________

Answers

Answer 1
Answer:

Answer:

Step-by-step explanation:

9y = 423

We move 9 to the other side and divide by 423.

y = 423/9

y = 47

Our answer is 47.

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joe is preparing 18 hot dogs for his party. However, Joe only has 12 hot dog buns. How many more hot dog buns does Joe need?*

Answers

Its quite simple. Its just subtraction.
18 hotdogs - 12 hotdog buns = 6 hotdug buns still needed
18-12= 6
6 is the amount of hotdog buns needed.

You subtract 12 from 18 because you already have that amount of buns and need to see how many you need to get. 

Through:
(-4,2) and (-3,-3)

Answers

Answer:

m=-5

Step-by-step explanation:

abby is putting tiles on a floor she needs 48 tiles and 8 rows each row has 6 blue tiles the rest are purple how many purple tiles will she need

Answers

48 tiles divided up into 8 rows equals 6 tiles in each row.  If each row has 6 blue tiles, then all of the tiles are blue :( She does not need any purple tiles.  Are you sure that you wrote your question correctly?
She will not need any purple tiles because all of her tiles, 8*6, 48, will be blue. 

Find value of x and y

2.) 4x+13y=40
4x+3y=-40

Answers

\left\{\begin{array}{ccc}4x+13y=40\n4x+3y=-40&/\cdot(-1)\end{array}\right\n+\left\{\begin{array}{ccc}4x+13y=40\n-4x-3y=40\end{array}\right\n-----------\n.\ \ \ \ \ \ 10y=80\ \ \ \ /:10\n.\ \ \ \ \ \ y=8\n\n4x+3\cdot8=-40\n4x+24=-40\n4x=-40-24\n4x=-64\ \ \ \ /:4\nx=-16\n\nSolution:x=-16\ and\ y=8.
4x + 13y = 40
4x + 3y = -40
using elimination method
10y = 80
y = 8
substitute y in eq1
4x + 13(8) = 40
4x + 104 = 40
4x = 40 - 104
4x = - 64
x = -16

Andrew is looking into prices for cable for his new home. He received the following breakdown for monthly prices.Basic Cable: $35.99
Cable boxes: $3.49 per cable box
HD Service: $9.99 per cable box
DVR: $14.99 per cable box
Installation Fee: $120.00 (one-time fee)

The total cost for 12 months of cable service with b cable boxes is represented by the expression below.
$551.88 + $341.64b

Which statement best describes the coefficient of "B"?

A. It is the cost for basic cable for one month and the installation fee.

B. It is the cost for basic cable for one year and the installation fee.

C. It is the cost for one cable box with DVR and HD service for one month.

D. It is the cost for one cable box with DVR and HD service for one year.

Answers

Given:

551.88 + 341.64b

The coefficient of "B" is 341.64, the best statement that applies to it is:

D. It is the cost for one cable box with DVR and HD service for one year.

Cable boxes: $ 3.49 per cable box
HD Service:   $ 9.99 per cable box
DVR:             $ 14.99 per cable box
Total :            $ 28.47
multiply             12 months
Annual cost  $341.64

Simplify. 5^-1(3^-2) (1 point)

Answers

5^-1x3^-2=1/5x1/3^2=1/5x1/9=1/(5x9)=1/45

Answer:

1/45

Step-by-step explanation:
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