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ZanzabumX [31]
3 years ago
14

the sum of two numbers is 63. the smaller number is 21 less than the larger number. what are the numbers

Mathematics
2 answers:
bonufazy [111]3 years ago
8 0

Answer:

42 and 21

Step-by-step explanation:

Let x and y be the two numbers

the sum of the two numbers is 63

y+x = 63

The difference between the numbers is 21

x-y= 21

so the two equations are :

\left \{ {{x+y=63} \atop {x-y=21}} \right.

add both equations to eliminate y

x+y+x-y = 63+21

2x =84

x= 42

y= 42-21 = 21

the two numbers are 42 and 21

BabaBlast [244]3 years ago
7 0

Answer:

Step-by-step explanation:

I think 21 and 42

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n^-6 * n^3 = n^-3

If you need to finish without having a negative exponent in your answer, then remember a negative exponent means that factor is on the wrong side of the fraction.

n^-3 = n^-3 / 1 = 1/n^3

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2 years ago
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Answer:

X=75

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Step-by-step explanation:

A straight line is 180, so add the equations that make a line and set them equal to 180

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Subtract 30 from both sides

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5 0
3 years ago
Y-5=1/2(x-4) what are the coordinates
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Answer:

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Step-by-step explanation:

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8 0
1 year ago
The points (3, 9) and (–3, –9) are plotted on the coordinate plane using the equation y = a • x. What is the value of a?
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5 0
3 years ago
A fossilized leaf contains 18% of its normal amount of carbon 14. How old is the fossil (to the nearest year)? Use 5600 years as
Sati [7]

Answer: The age of the fossilized leaf is 13829 years.

Step-by-step explanation:

Expression for rate law for first order kinetics is given by:

t=\frac{2.303}{k}\log\frac{a}{a-x}

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k = rate constant  

t = age of sample

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7 0
3 years ago
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