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Tamiku [17]
2 years ago
9

Dad is twice as old as Jon. Grand-Pa is seven years older than three times Jon's age. The sum of their age is 145 years. How old

is Grand-Pa?
pls help i will give the brinlist:0
Mathematics
1 answer:
Alenkasestr [34]2 years ago
3 0

Step-by-step explanation:

let jon age be x

dad age is 2 of x i.e 2x

grandpa age is 7 + 3(x)

The sum of jon dad and grandpa age is 145 i.e

x + 2x + (7+3x) = 145

3x +. 7 + 3x = 145

6x = 145- 7

6x = 138

divide both sides by 6

x = 23

jon age is 23

while

grandpa age is

7 + 3(x)

7 + 3(23)

7 + 69

76.

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Pls help meh
san4es73 [151]

Answer:

7.1 (7.06 rounded to the tenth)

Step-by-step explanation:

The formula for Area of a Circle is: π·r²

R = Radius

π = pi, or 3.14

As long as you know the formula, this is easy!

In class, you may have already been told that the radius is <em>half </em>of the diameter.

1. Half of 3 ft is 1.5 ft.

2. Plug 1.5 in for r, in your calculator

3. Do the calculation, and you should come out to get 7.06858347058

4. Round it!

Finding area for a circle is satisfying, isn't it? xD

5 0
2 years ago
A dinner plate has a diameter of about 9 inches what is the circumference and area?
lukranit [14]
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7 0
3 years ago
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A triangle has side lengths of ,m,3m,and 3m+3. what is the perimeter of the triangle
Galina-37 [17]

Answer:

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Step-by-step explanation:

To find the perimeter of a triangle, we add up all the sides

m + 3m + 3m+3

Combine like terms

7m +3

5 0
3 years ago
The formula for the area of a square is s2, where s is the side length of the square. What is the area of a square with a side l
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8 0
3 years ago
WILL GIVE BRAINLIEST ANSWER
Olegator [25]

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