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Andreyy89
2 years ago
5

PLEASE HELPPP!!! explain how you know!

Mathematics
1 answer:
skelet666 [1.2K]2 years ago
7 0

Answer:

Negative

Step-by-step explanation:

-2.7+x=-3.5

x=-3.5+2.7

x=-0.8

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Find the endpoint of the line segment with the given endpoint and midpoint.
Aleks04 [339]

Answer:

(6,9)

Step-by-step explanation:

If you're looking for the <em>other</em> endpoint, y goes up by 7 between these two points, so to get from (6,2) 2+7 is 9.

5 0
3 years ago
A walkway is being installed around a rectangular playground. The playground is 30 feet by 12 feet, and the total area of the pl
worty [1.4K]

Answer:

10.3

Step-by-step explanation:

From these question, we can illustrate the playground has a small rectangle with 30x12ft

the walkway is around it with an area of 1288ft²

the playground area = 30 x 12 = 360ft²

the length dimension of the walkway is 30+y+y( these is because the walkway is round the playground in two sides) = 30 +2y

the breadth dimension of the walkway is 12+y+y ( these is because the walkway is round the playground in two sides) = 12+2y

Area of walkway = (30+2y)(12+2y)= 30(12+2y)+2y(12+2y) = 360+60y+24y+4y²= 360+84y+4y²

The total area = 1288ft²

The total area = area of walkway - area of playground

1288ft² = 360+84y+4y² - 360

choose like terms

1288 = 360-360+84y+4y²

1288 = 84y+4y²

divide by 4

322= 21y+y²

y²+21y-322 =0

using quadratic formula

x= (-b±√b²-4ac)/2a = {-21±√21²-4(1)(-322)}/2x1 =  {-21±√441+1288}/2x1  = -21±√1729/2

-21+√1729/2   -21-√1729/2

√1729 = 41.5812457726

-21+√1729/2   -21-√1729/2

{-21+41.5812457726}/2   {-21-41.5812457726}/2

20.5812457726/2          -62.5812457726/2

10.2906228863              -31.2906228863

we disregard the negative sign

our width is 10.2906228863 ≅10.3

4 0
2 years ago
Read 2 more answers
Charlie runs 2 laps in 8 minutes. How many minutes will 9 laps take him?
Fofino [41]

Answer:

36 minutes

Step-by-step explanation:

We can write a ratio

2 laps           9 laps

-------------   = --------------

8 minutes     x minutes

Using cross products

2x = 8*9

2x = 72

Divide by 2

2x/2 = 72/2

x = 36 minutes

8 0
3 years ago
How many solutions will this equation have?
Marizza181 [45]

B. infinitely many solutions

5 0
3 years ago
Matter is anything that
maksim [4K]
A. has mass and takes up space :)
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3 years ago
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