All categories

3 years ago

Can someone help me on this?

Mathematics

1 answer:

n200080 [17]3 years ago

6 0

Answer:

k = -5

Step-by-step explanation:

y = -8x - 73 and x = -4

y = (-8) (-4) - 73 = - 41 : intersect at (-4 , - 41)

(-4 , - 41) must at y = 9x + k

-41 = 9*(-4) +k

k = -41 + 36 = -5

y = 9x - 5 x<-4

You might be interested in

Please answer quickly<br>expand and simplify: 4(5x-3y) (x-4y) -(3x-4y)(2x+3y)

Gekata [30.6K]

Answer: 14x^2-93xy+60y^2 Hope that helps!

Step-by-step explanation:

1. Expand by distributing terms

(20x-12y)(x-4y)-(3x-4y)(2x+3y)

2. Use the Foil method:(a+b)(c+d)= ac+ad+bc+bd

20x^2-80xy-12yx+48y^2-(3x-4y)(2x+3y)

3. Use the Foil method : (a+b)(c+d)= ac+ad+bc+bd

20x^2-80xy-12yx+48y^2-(6x^2+9xy-8yx-12y^2)

4. Remove parentheses 20x^2-80xy-12yx+48y^2-6x^2-9xy+ 8yx+12y^2

5. Collect like terms (20x^2-6x^2)+(-80xy-12xy-9xy+8xy)+(48y^2+12y^2)

6. Simplify.

And your answer would be 14x^2-93xy+60y^2

5 0

3 years ago

A rectangular yard is 18 feet long. The area of the yard is 400.5 square feet. What is the width of the yard

AnnZ [28]

Answer:

22.5

Step-by-step explanation:

5 0

4 years ago

Find the percent of change and round to the tenths if necessary.<br> 41 euros to 85 euros.

DanielleElmas [232]

Answer:

48.2%

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Im learning Polynomials and we are learning the strategy grouping, can anyone please explain how to group polynomials and maybe

crimeas [40]

Grouping is when you have to terms that are the same inside the parenthesis and a different or same number outside the parenthesis and then the one inside the parenthesis u are going to group them not combined them and write them once and the numbers inside the parenthesis group them together by adding them and put parenthesis between them

Ex
5(4x+1)10(4x+1)
(5+10)(4x+1)

6 0

4 years ago

Read 2 more answers

At a carnival, you use 6 tickets each time you go on a ride. After going on 3 rides, you have 32 tickets left.

S_A_V [24]

Answer:

1)The number of tickets remaining is EQUAL the number of tickets remaining before going on the ride and MINUS the number of tickets remaining after going on the next ride.

2) Function T(r) = 50 - 6 r models the number of remaining tickets

Step-by-step explanation:

The number of tickets used in each ride = 6 tickets

Tickets left after going on 3 rides = 32

Now, The number of tickets used in 1 ride = 6 tickets

So, the number of tickets used in 3 rides = 6 tickets x 3 = 18 tickets

Total Number of tickets - Tickets used in 3 rides = Remaining tickets

or, Total Tickets = 32 tickets + Tickets used in 3 rides

= 32 + 18 = 50 tickets

The number of tickets remaining is EQUAL the number of tickets remaining before going on the ride and MINUS the number of tickets remaining after going on the next ride.

Now, let us assume: T(r) is the number of tickets remaining.

r is the number of rides you have gone on

Now, Total tickets = 50

Each ride uses 6 tickets.

So, the number of tickets used in r rides = r x ( 6 tkts) = 6 r

So, the tickets left after r sides = Total tickets - Tickets used in r rides

or: T(r) = 50 - 6 r

Hence, The function T(r) = 50 - 6 r models the number of remaining tickets

7 0

3 years ago

Read 2 more answers