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amm1812
2 years ago
10

You will get Brainly if if you answer correctly and provide step-by-step explanation pls help me I need help with five

Mathematics
1 answer:
lord [1]2 years ago
7 0

Answer:

2x^2+xy-3y^2

Step-by-step explanation:

Start by taking everything out of the parentheses:

3x^2-2xy-2y^2-x^2-(-3xy)-(y^2)

Note two negatives make a positive:

3x^2-2xy-2y^2-x^2+3xy-y^2

Combine like terms:

3x^2-x^2-2xy+3xy-2y^2-y^2

Simplify

2x^2+xy-3y^2

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Anita plans to cover a solid cone with construction paper for a science project. The cone has a diameter of 11 inches and a slan
galben [10]

Answer:

587.18 in²

Step-by-step explanation:

In the above question, we are given the following values

Diameter = 11 inches

Radius = Diameter/2 = 11 inches/2 = 5.5 inches

Slant height = 28.5 inches.

We were asked to find how many square inches of paper will she need to cover the ENTIRE cone.

To solve for this, we would use formula for Total Surface Area of a Cone

Total Surface Area of a Cone = πrl + πr²

= πr(r + l)

Using 3.14 for π

Total Surface Area of a Cone

= 3.14 × 5.5( 5.5 + 28.5)

= 3.14 × 5.5 × (34)

= 587.18 in²

Therefore, Anita will need 587.18 square inches of paper to cover the entire cone.

7 0
3 years ago
Y+2=-3/2(x+2) in slope intercept form
Aleksandr [31]

Answer:

y = -3/2x -5

Step-by-step explanation:

We want slope intercept form which is y = mx+b

Y+2=-3/2(x+2)

Distribute

y+2 = -3/2x -3

Subtract 2 from each side

y+2-2 = -3/2x -3-2

y = -3/2x -5

5 0
3 years ago
∠C and ∠D are complementary.
djverab [1.8K]

Answer:

  • x = 7

Step-by-step explanation:

Complementary angles are angles that add up to 90°.

We have C and D as complementary.

Their sum is:

  • m∠C + m∠D = 90

Substitute values and solve for x:

  • 8x + 5x - 1 = 90
  • 13x = 90 + 1
  • 13x = 91
  • x = 91/13
  • x = 7
7 0
3 years ago
Read 2 more answers
There are 10 fruits in a basket and 5 of them are apples. Write the ratio in simplest form.
klasskru [66]

Answer:

10:5= 2:1

Step-by-step explanation:

Hope this helped!! Give brainliest..

3 0
3 years ago
Read 2 more answers
A tailor has 13 1/2 yards of fabric to use for making costumes. For each costume, he needs 1 1/2 yards of fabric for the top and
VLD [36.1K]

Answer:

6 complete costumes

Step-by-step explanation:

he has 27/2 total fabric

1 costume requires 1 2/4 + 3/4 of fabric, which is 2 1/4

we divide 27/2 by 9/4

27/2 x 4/9 = 6

3 0
3 years ago
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