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andreev551 [17]
2 years ago
5

Plzz help!!!!!!!I 'll give brain liest​

Mathematics
1 answer:
Basile [38]2 years ago
7 0

Answer:

Step-by-step explanation:

1. 3x2 + 5x - 4 + 6x2 - x + 7

= combining like terms

= 9x2 + 4x + 3

2. 2y2 - 3y + 6 + y2 - 5y - 1 + (-4) + 2y2 - 2y

= 5y2 - 10y + 1

3. 2x2y - 3xy2 + x2y - 4x2y - 2xy2

= - x2y - 5xy2

4. x2 - y2 + 2x2 - 3xy + 4y2 + 3y2 - 5xy - x2

= 2x2 - 8xy + 6y2

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What is the length of RU?
marta [7]

Answer:

Length of RU is 20 units.

Step-by-step explanation:

In ΔRSt and ΔRUT,

ST ≅ TU [Given]

RT ≅ RT [Reflexive property]

∠RTS ≅ ∠RTU [Both the angles are the right angles]

ΔRTS ≅ ΔRTU [By SAS property of congruence]

Therefore, RS ≅ RU [By CPCTC (corresponding parts of the congruent triangles are congruent]

8x = 6x + 5

8x - 6x = 5

2x = 5

x = 2.5

Length of RU = (6x + 5)

                      = 6(2.5) + 5

                      = 15 + 5

                      = 20

Length of RU is 20 units.

7 0
3 years ago
Solve the inequality 3x - 5 < 4.
Pachacha [2.7K]

Answer:

      x < 3

Step-by-step explanation:

Since 3x - 5 < 4 then we can transpose the inequality to make x the subject of the equation:

    If 3x - 5 < 4

⇒    3x < 4 + 5

⇒       x < 9 ÷ 3

⇒       x < 3

8 0
2 years ago
The sphere shown has a radius of 3 yards. What is the approximate volume of the sphere? Use 3.14 to approximate pi.
slavikrds [6]

Answer:

The volume of the sphere is 113.04 yd³

Step-by-step explanation:

8 0
2 years ago
Solve the equation 15x=60
Tcecarenko [31]

Answer:

x = 4

Step-by-step explanation:

3 0
3 years ago
HELP I FORGOT TO PUT THE FILE IN SO HERE IT IS :)
xeze [42]

Answer:

0.525

21/40 as a decimal is 0.525.

3 0
3 years ago
Read 2 more answers
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