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RSB [31]
3 years ago
9

The ages of three siblings Jason John and Jackson totals 21 years. Jason is one year older than John. Jackson is three times as

old as John. How old is John?
Mathematics
1 answer:
Ymorist [56]3 years ago
6 0

Answer:Jason is 5 years old.

John is 4 years old.

Jackson is 12 years old.

Step-by-step explanation:

Let x represent the age of Jason.

Let y represent the age of John.

Let z represent the age of Jackson.

The ages of three siblings Jason John and Jackson totals 21 years. It means that

x + y + z = 21 - - - - - - - - - - -1

Jason is one year older than John. It means that

x = y + 1

Jackson is three times as old as John. It means that

z = 3y

Substituting x = y + 1 and z = 3y into equation 1, it becomes

y + 1 + y + 3y = 21

5y = 21 - 1 = 20

y = 20/5 = 4

x = y + 1 = 4 + 1

x = 5

z = 3y = 3 × 4

z = 12

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Answer:

Whether the answer is positive or negative depends on the number of positive and negative values in the question. The rules are exactly the same as to whether an answer is positive or negative. In the case of fractions, the rules for multiplying fractions apply as well (the numerators in the expression multiply to produce the product's numerator; the denominators in the expression multiply to produce the product's denominator) and the answer should be reduced to lowest terms.

If there is an odd number of negative terms, the answer will be negative.

If there is an even number of negative terms, the answer will be positive.

7 0
3 years ago
A Ferris wheel has a diameter of 100 feet. The highest point of the wheel is 125 feet. The y-axis represents the center of the w
Free_Kalibri [48]

Answer: x^2+(y-125)^2=2500


Step-by-step explanation:

Given: The diameter of the Ferris wheel= 100 feet

therefore, the radius of the Ferris wheel= 50 feet

Also, the highest point of the wheel is 125 feet.

Since , y axis represents the center of the wheel.

The center of the wheel= (0,125)

The equation of circle with center (h,k) and radius 'r' is given by :

(x-h)^2+(y-k)^2=r^2

Thus, the equation of the circle with center (0,125) and radius=50 is given by :-

(x-0)^2+(y-125)^2=(50)^2\\\Rightarrow\ x^2+(y-125)^2=2500


3 0
3 years ago
What would be the slope of y=3x.?
lawyer [7]

Answer:

3

Step-by-step explanation:

The slope is the coefficient to the x variable.

In the equation y = 3x, this means 3 is the slope because it is the coefficient to x.

So, the slope is equal to 3.

4 0
3 years ago
Read 2 more answers
The area of a parallelogram is 96 cm squared the height is 4 cm less than the length what is
andrey2020 [161]
Area of paralellogram=legnth times height

l=legnth
h=height
area=96

lh=96

h is 4 less than l
h=-4+l
sub
l(-4+l)=96
-4l+l^2=96
minus 96 both sides
l^2-4l-96=0
factor
(l-12)(x+8)=0
set to zero
l-12=0
l=12

l+8=0
l=-8, imossible, legnth cannot be negative, disreagard this soultion

legnth=12cm
8 0
3 years ago
Read 2 more answers
Can someone help me with this
hichkok12 [17]

Answer:

on mathaway you can ask it to solve using a table of values.

Or if you have a graphing calculator you can hit the 2nd, and then the graph buttons to get a table of values

Step-by-step explanation:

4 0
3 years ago
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