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3 years ago

PLZ HELP?????????????????

Mathematics

1 answer:

elixir [45]3 years ago

7 0

Triangular numbers :)

a) 13=3+10
b) 31=3+28
c) 55=10+45

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4. If a total of 425 DVD's were rented and 85 of those rentals were comedies. What percent of total

Ostrovityanka [42]

Answer:20%

Step-by-step explanation:85 times 5 equals 425 100 divided by 5 is 20

3 0

3 years ago

X-5y-z=-20 -2x-y-6z=25 -x-4y-z=-15 Solve by elimination

Tju [1.3M]

Answer:

x = 0

y = 5

z = -5.

Step-by-step explanation:

X-5y-z=-20

-2x-y-6z=25

-x-4y-z=-15

Add equation 1 and 3:

-9y - 2z = -35 .......... A

Multiply the first equation by 2:

2x - 10y - 2z = -40

Now add this to equation 2:

-11y -8z = -15.............B

Now multiply equation A by -4:

36y + 8x = 140.........C

Add equations B and C:

25y = 125

y = 5.

Substitute for y in equation A:

-9*5 - 2z = -35

2z = -45 + 35 = - 10

z = -5.

Now find x by substituting for y and z in the first equation:

x - 5(5) - (-5) = -20

x - 20 = -20

x = 0.

6 0

3 years ago

PLS HELP ASAP ITS A WUIZ

sukhopar [10]

Answer:

Step-by-step explanation:

so i plugged this into a graphing calculator.. maybe it's not fair to use technology :D

vertex (1,-9)

y intercept = -8

line of symmetry is x = 1

4 0

3 years ago

Read 2 more answers

Help I dont get this and its do tomorrow.

dangina [55]

BECAUSE

4(2x)= 8x
4(1)= 4

SO

4+8x= 4(2x+1)

4 0

3 years ago

Answer for brainliest

yaroslaw [1]

Answer:

i believe JL=12

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers