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3 years ago

12

Find the values of a and b

2 answers:

nikdorinn [45]3 years ago

6 0

The values of a and b are as follows :
A=109
B=65

lisabon 2012 [21]3 years ago

5 0

Answer:

a = 115, b = 71

Step-by-step explanation:

The figure has one pair of parallel sides and is a trapezium.

Using a property of trapeziums

• each lower base angle is supplementary to the upper base angle on the same side.

a = 180 - 65 = 115

b = 180 - 109 = 71

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Answer:

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Step-by-step explanation:

30-2(7+2)-1

PEMDAS says parentheses first

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3 years ago

Divide x to the 5 eighths power divided by x to the 1 fourth power.

8_murik_8 [283]

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3 years ago

Element X is a radioactive isotope such that its mass decreases by 26% every day. If an experiment starts out with 810 grams of

ioda

Answer:

The hourly decay rate is of 1.25%, so the hourly rate of change is of -1.25%.

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Step-by-step explanation:

Exponential equation of decay:

The exponential equation for the amount of a substance is given by:

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In which A(0) is the initial amount and r is the decay rate, as a decimal.

Hourly rate of change:

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Starts out with 810 grams of Element X

This means that $A(0) = 810$

Element X is a radioactive isotope such that its mass decreases by 26% every day.

This means that we use, for this equation, r = 0.26.

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$A(t) = A(0)(1-r)^t$

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2 years ago

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liubo4ka [24]

Answer:

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1 year ago

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