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Maru [420]
3 years ago
14

X + y = –4 y = 3x + 16

Mathematics
2 answers:
kotykmax [81]3 years ago
8 0
-4-x=3x+16
-4=4x+16
4x=-20
x=-5
babymother [125]3 years ago
6 0
If
x+y=-4
y-3x=16 or we cn write as
   x+y=-4
-3x+y=16
i multiply the first equation by 3
3x+3y=-12
-3x+ y=16
4y=4
y=1
x+1=-4
x=-5

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Please help with the tennis court one.
solniwko [45]
We have two sides of length 'w'. They are the vertical sides.

We also have two sides of length '2w+6' which are the horizontal sides.

So we have these four sides
side1 = w
side2 = 2w+6
side3 = w
side4 = 2w+6

Let's add up those four sides to get
Perimeter = (side1)+(side2)+(side3)+(side4)
Perimeter = (w)+(2w+6)+(w)+(2w+6)
Perimeter = w+2w+6+w+2w+6
Perimeter = 6w+12

------------------------

Since the perimeter is given to be 228, and we found the perimeter expression to be 6w+12, this must mean that the two are equal

So, 6w+12 = 228

Let's solve for w

6w+12 = 228
6w+12-12 = 228-12
6w = 216
6w/6 = 216/6
w = 36

------------------------

Now that we know that w = 36, we can find the dimensions of this rectangle

The vertical sides are simply w, so the vertical sides are 36 feet each. I simply replaced w with 36.

The horizontal sides are a bit more complicated. The expression we have is 2w+6 or 2*w+6. Let's replace w with 36 and use PEMDAS to evaluate

2*w+6 = 2*36+6 = 78

------------------------------------------
------------------------------------------

Answers are...
Length = 78 feet
Width = 36 feet
(the length is the horizontal component, the width is the vertical)
5 0
4 years ago
Gina is four years younger<br> than twice David's age. Gina<br> is 18. How old is David?
Sati [7]

Answer:

44

Step-by-step explanation:

Gina is four years younger so

18+4=22

since its twice davids age

22×2=44

6 0
3 years ago
What 2 numbers add up to 3 and multiply to -18?
prohojiy [21]
6 x (-3) = -18
6 + (-3) = 3
The numbers are 6 and -3
4 0
3 years ago
Find the length of side AB.<br>Give your answer to 1 decimal place.​
Luden [163]

Answer:

The answer is below

Step-by-step explanation:

A triangle is a polygon with three sides and three angles. Types of triangles are isosceles, scalene, equilateral, acute, obtuse and right angled triangle. A right angle triangle is a triangle with one angle being 90°.

Trigonometric ratios is used to show the relationship between the angles and sides of a right angled triangle. Examples are:

sinΘ = opposite/hypotenuse; cosΘ = adjacent/hypotenuse; tanΘ = opposite/adjacent

From the question:

cos(62) = AB/12

AB = 12 * cos(62)

AB = 5.6 cm

4 0
3 years ago
Mary ran 2 miles in about 23 minutes. If she continued the same pace, how long will it take her to run 10 miles?
natali 33 [55]
I think 115 min because its just 23 x 5 so you just multiply that to get the asnwer
8 0
4 years ago
Read 2 more answers
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