3 years ago

Which quadrilaterals must have both pairs of opposite angles that are congruent?

Mathematics

1 answer:

pashok25 [27]3 years ago

7 0

The correct answer is c

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Element X is a radioactive isotope such that every 90 years, its mass decreases by half. Given that the initial mass of a sample

steposvetlana [31]

Answer:

approximately 27 grams

Work Shown:

Half life formula

y = A*(0.5)^(x/H)

where,

A = starting amount = 30 grams

H = half life period = 90 years

x = number of years that pass by = 12

y = amount left over after x years

Let's plug the values for x, A and H into the formula to find y

y = A*(0.5)^(x/H)

y = 30*(0.5)^(12/90)

y = 27.3516746567466

y = 27 .... rounding to the nearest whole number

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3 years ago

What are the solutions of the equation x4 + 95x2 – 500 = 0? Use factoring to solve. x = plus-or-minus StartRoot 5 EndRoot and x

Oduvanchick [21]

Answer:

* x ⇒ plus-or-minus StartRoot 5 EndRoot and ±10i *

Step-by-step explanation:

Through factorization;

x^4 + 95x^2 – 500 = 0, ⇒ u^2 ⇒ x^2,

u^2 + 95u - 500 = 0, ⇒ factors of -500; -25, 20, -50 * 10, -2 * 250, -5 * 100...

( u )^2 + ( - 5 + 100 ) + ( - 5 * 100 ) = 0,

( u - 5 )( u + 100 ) = 0,

u = 5, and y = - 100

Substitute u back into format x^2;

u = x^2, 5 = x^2, | x | = √5 ⇒ x = - / + √5,

u = x^2, - 100 = x^2, | x | = √- 100 ⇒ x = - / + 10i

* Answer: x ⇒ plus-or-minus StartRoot 5 EndRoot and ±10i *

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3 years ago

Terry ran around a circular track . if the radius of the track is 200 feet how far did tarry run

worty [1.4K]

The Circumference would be 1256.637 and the diameter would be 400

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3 years ago

A 100-inch pipe is cut into two pieces. One piece is three times the length of the other. Find the length of the shorter piece.

Lostsunrise [7]

The shorter piece would be 25 inches

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3 years ago

Sorry for the computer quality lol but can someone please help ?

xenn [34]

Answer:

a=(-1,0) b=(0,3) c=(-2,2)

Step-by-step explanation:

7 0

4 years ago