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Ludmilka [50]
4 years ago
12

Click on the pic,, plz help

Mathematics
1 answer:
mariarad [96]4 years ago
6 0

Answer: - 2x^2 + 4x + 3

Step-by-step explanation:

( -x^2 - 4x - 5) + ( -x^2 + 8x + 8)

Take out parentheses:

- x^2 - 4x - 5 - x^2 + 8x + 8

Write in a way so that like terms are grouped together:

- x^2 - x^2 - 4x + 8x - 5 + 8

Combine 'x^2' terms:

- 2x^2 - 4x + 8x - 5 + 8

Combine 'x' terms:

- 2x^2 + 4x - 5 + 8

Combine integers:

- 2x^2 + 4x + 3

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Four balls of wills will make 8 knitted caps. How many balls of wills will Malcom need if he wants to make 6 caps ?
Fittoniya [83]
<span>We know that 4 balls will make 8 caps. Than x balls will make 6 caps. We will use the proportion: 4 / 8 = x / 6. After that we will cross multiply: 8 x = 6 * 4, 8 x = 24, x = 24 : 8, x = 3. Answer: 3 balls of wills will make 6 knitted caps. I hope that my answer is helpful! Let me know if you need something more :)</span>
8 0
3 years ago
Suppose a triangle has two sides of length 2 and 3 and that angle between these two sides is 60 degrees. What is the length of t
Arturiano [62]

Answer:

Apply cosine rule:

c²=b²+a²-2ba cosC

C= pi/3 = 180/3 = 60 degrees

cosine 60 deg = 0.5

c²=2²+3²-[2×2×3×0.5]

c²=7

c=√7

c=2.645 ;length of third side of angle

Step-by-step explanation:

6 0
3 years ago
2# Find the missing variable (s). Round to the nearest tenth.
mel-nik [20]

Answer:

15 cos(33°) m


Step-by-step explanation

Presumably m stands for meters.

If RS were 1, x would be cos(33°)

Multiply sides of triangle by 15 m

When calculating cos(33°) first make sure cos(90°) comes out zero, not -0.448...

6 0
3 years ago
I really need help pleaseeee on the wrong ones
dezoksy [38]
(x 3) is the answer
3 0
4 years ago
3. Use Structure Ana drew a plan for a
shtirl [24]

Answer:

(5.5, -3.5)

Step-by-step explanation:

As you can see in the figure, the fourth vertex is (5.5, -3.5)

If you observe carefully the vertex given, you will see that there are two vertex with same coordinates in x axis:

  • (-1.2, -3.5),
  • (-1.2, 4.4),

And one vertex has other coordinate in x axis, it is: (5.5, 4.4)

To form a rectangle, you need a fourth vertex that will have same coordinate in x than (5.5, 4.4) and same coordinate in y axis as (-1.2, -3.5),

Then the fourth vertex coordinate is (5.5, -3.5)

7 0
3 years ago
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