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Ilya [14]
3 years ago
5

Can someone give me the answers for theses I’ve been lost all day with online school

Mathematics
1 answer:
lilavasa [31]3 years ago
6 0

Answer:

True. That is a function.

Step-by-step explanation:

A function just means that every input has only one output. The simpler way to do these is the vertical line test. Draw a vertical line anywhere on the graph and see if the vertical line is intersected in two places. If the vertical line is crossed twice, the graph isn't a function.

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(8x^9y^3)^-2 (6x^7y^7) simplify. write the answer using positive exponents only
SOVA2 [1]
<span>(8x^9y^3)^-2 (6x^7y^7) simplify. write the answer using positive exponents only

</span>(8x^9y^3)^{-2} (6x^7y^7)=  \\  \\  \\ (8)^{-2} (x^9) ^{-2}( y^3)^{-2} (6)(x^7)(y^7)=  \\  \\  \\ (8)^{-2} (x) ^{9-2}( y)^{3-2} (6)(x^7)(y^7)=  \\  \\  \\ (8)^{-2} (x) ^{9-2+7}( y)^{3-2+7} (6)=  \\  \\  \\ 6*(8)^{-2} (x) ^{14}( y)^{8} = \\  \\  \\   \dfrac{6}{64} x ^{14} y^{8} = \boxed{\dfrac{3}{32}\  x ^{14} y^{8} }<span>
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4 years ago
Use the change of variables s=x+3y, t=y to find the area of the ellipse x2+6xy+10y2≤1.
MArishka [77]

t=y\implies s=x+3t\implies x=s-3t

Then

x^2+6xy+10y^2=(s-3t)^2+6(s-3t)t+10t^2=s^2+t^2\le1

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5 0
4 years ago
Calculate the height of a right circular cylinder with a surface area of 300 square inches and a radius of 5 inches. a. 2.45 inc
julsineya [31]

Answer:

The height of the right circular cylinder is 4.55 inches ⇒ b

Step-by-step explanation:

The formula of the surface area of a right circular cylinder is

S.A = 2πrh + 2πr², where

  • r is its radius
  • h is its height

∵ The surface area of a right circular cylinder is 300 square inches

∴ S.A = 300 in.²

∵ Its radius is 5 inches

∴ r = 5 in.

∵ π = 3.14

→ Substitute them in the rule above

∵ 300 = 2(3.14)(5)(h) + 2(3.14)(5)²

∴ 300 = 31.4h + 157

→ Subtract 157 from both sides

∵ 300 - 157 = 31.4h + 157 - 157

∴ 143 = 31.4h

→ Divide both sides by 31.4

∵ 4.554140127 = h

∴ 4.55 = h

∴ The height of the right circular cylinder is 4.55 inches

3 0
3 years ago
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