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slava [35]
3 years ago
14

Pleas help me -2 + 8

Mathematics
2 answers:
Ymorist [56]3 years ago
8 0

Answer:

6

Step-by-step explanation:

oee [108]3 years ago
5 0

Answer: 6

Step-by-step explanation: ok so what you do is you minus 2 from the positive side of numbers and you keep it positive

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Find the exact length of the curve. x = 1 + 6t2, y = 4 + 4t3, 0 ≤ t ≤ 3
vovangra [49]

x=1+6t^2\implies\dfrac{\mathrm dx}{\mathrm dt}=12t

y=4+4t^3\implies\dfrac{\mathrm dy}{\mathrm dt}=12t^2

The length of the curve C is given by

\displaystyle\int_C\mathrm ds=\int_0^3\sqrt{\left(\frac{\mathrm dx}{\mathrm dt}\right)^2+\left(\dfrac{\mathrm dy}{\mathrm dt}\right)^2}\,\mathrm dt

=\displaystyle\int_0^3\sqrt{144t^2+144t^4}\,\mathrm dt

=\displaystyle12\int_0^3t\sqrt{1+t^2}\,\mathrm dt

=\displaystyle6\int_0^3 2t\sqrt{1+t^2}\,\mathrm dt

=\displaystyle6\int_0^3\sqrt{1+t^2}\,\mathrm d(1+t^2)

=6\cdot\dfrac23(1+t^2)^{3/2}\bigg|_0^3

=4(10^{3/2}-1)

=40\sqrt{10}-4

8 0
3 years ago
Sarah earned $175 babysitting for her neighbors. If she saved 40% of her money how much did she save?
S_A_V [24]

Answer:

70 dollars

Step-by-step explanation:

40% of 175 is 70

6 0
3 years ago
Read 2 more answers
Please help me with questions 23-39
Mrac [35]

Answer:

23) 36·(3·1/4) = 36·(3/4) = 108/4 = 27

24) (4·2/7)·21 = (8/7)·21 = 168/7 = 24

25) 2(x+4) = 2x+8

26) (5+n)3 = 15+3n

27) (4-3m)8 = 32-24m

28) -3(2x-6) = -6x+18

29) 13r+5r = 18r

30) 3x³-2x²

31) 7m+7-5m = 2m+7

32) 5z²+3z+8z² = 3z+13z²

33) (2-4n)17 = 34-68n

34) 11(4d+6) = 44d+66

35) 7m+2m+5p+4m = 13m+5p

36) 3x+7(3x+4) = 3x+21x+28 = 24x+28

37) 4(fg+3g)+5g = 4fg+12g+5g = 4fg+17g

38) (5m)²+(m+5)²= 26m²+10m+25

39) 7(a²+b)-4(a²+b) = 3(a²+b) = 3a²+b

7 0
3 years ago
Positive angles are generated by
bulgar [2K]

Answer:

Counterclockwise rotation

Step-by-step explanation:

An angle is in standard position if its initial side lies on the positive x-axis and its vertex is the origin.  Positive angles are generated by counterclockwise rotation, and negative angles are generated by clockwise rotation.

4 0
3 years ago
Prism M and pyramid N have the same base area and the same height. Cylinder P and prism Q have the same height and the same base
m_a_m_a [10]

Answer:

Answer Cone Z and Cylinder Y.

Step-by-step explanation:

The relationship between the volume of the cone and the volume of the cylinder with the same height and same base is the volume of the cone is 1/3 of the volume of the cylinder.

The formula for the volume of the cone is :

V = 1/3πr^{2}h

The formula for the volume of the cylinder is :

V = πr^{2}h

Let be the height of the cylinder Y. Therefore the height of the cone Z is 3h, when we put it into the formula we get :

V = 1/3πr^{2} (3h) = πr^{2}h

Therefore Cone Z and Cylinder Y have same volume.

8 0
4 years ago
Read 2 more answers
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