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2 years ago

Properties if real numbers, find the additive inverse and multiplicative inverse of each number

Mathematics

1 answer:

Maru [420]2 years ago

4 0

0.4

Additive=-0.4

Multiplicative=1/0.4

5 5)6=35/6

Additive=-35/6
Multiplicative=6/35

5x-3y-2x+3y=3x

Additive=-3x
Multiplicative=1/3x

-11a-13b+7a-3b=-4a-16b

Additive

4a+16b

Multiplicative

1/(4a+16b)

8x-7y-(3-6y)=8x-7y-3+6y=8x-y-3

Additive.

y-8x+3

Multiplicative

1/(8x-y-3)

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1 3/4 x 7 = 12 1/4 Hope this help.

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Please answer all the questions above.

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What is the solution of the system

Fantom [35]

Y-2x=8
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3 years ago

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A building 220 feet casts a 100 foot long shadow. If a person stands at the end of the shadow and looks up to the top of the bui

kaheart [24]

Answer:

65.56°

Step-by-step explanation:

= We solve the above question using the Trigonometric function of Tangent

tan θ = Opposite/Adjacent

Opposite = 220 feet = Height of the building

Adjacent = 100 feet = Length of the shadow

Hence,

tan θ = 220/100

tan θ = 2.2

= arctan(2.2)

= 65.55604522°

Approximately = 65.56°

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2 years ago

g A 5 foot tall man walks at 10 ft/s toward a street light that is 20 ft above the ground. What is the rate of change of the len

vredina [299]

Answer:

$-\frac{10}{3}ft/s$

Step-by-step explanation:

We are given that

Height of man=5 foot

$\frac{dy}{dt}=-10ft/s$

Height of street light=20ft

We have to find the rate of change of the length of his shadow when he is 25 ft form the street light.

ABE and CDE are similar triangle because all right triangles are similar.

$\frac{20}{5}=\frac{x+y}{x}$

$4=\frac{x+y}{x}$

$4x=x+y$

$4x-x=y$

$3x=y$

$3\frac{dx}{dt}=\frac{dy}{dt}$

$\frac{dx}{dt}=\frac{1}{3}(-10)=-\frac{10}{3}ft/s=-\frac{10}{3}ft/s$

Hence, the rate of change of the length of his shadow when he is 25 ft from the street light= $-\frac{10}{3}ft/s$

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2 years ago