All categories

4 years ago

A man s five times as old as his son.in three years time,the product of their ages will be 380.

Mathematics

1 answer:

Mademuasel [1]4 years ago

6 0

Answer:

son age: X

man_age= 5X

in 3 years: we have: (man_age+3)(X+3)=380

we can replace the man age by 5X and we get :

(5X+3)(X+3)=380

it is a quadratic equation with 2 solutions. One negative and 7

The solution is thus 7, since age can not be negative.

The son is thus 7 and the dad 5 times more 35

Step-by-step explanation:

You might be interested in

PLZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP MEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

castortr0y [4]

Answer:

1/2 x -5/2 = -5/4

-1 1/4 + -1/4

-1 2/4

- 1 1/2

4 0

3 years ago

Between x=2 and x=3, which function has a greater average rate of change than f(x)=2^x has?

maxonik [38]

Answer: f(3)

Step-by-step explanation:

First find the formula for the rate of change by taking the derivative of 2^x. Let f(x) equal some hypothetical y-value, then take the natural log of both sides.

$y=2^x\\\ln(y)=x \ln(2)$

Implicitly differentiate the left side and take the derivative of the right side

$\frac{y'}{y} =\ln(2)$

Multiply both sides by 'y' which was defined as 2^x

$y'=\ln(2)*2^x$

Plug in x = 2 and x = 3 to see which slope is larger

$y'=\ln(2)*2^2=4\ln(2)\\y'=\ln(2)*2^3=8\ln(2)$

4 0

3 years ago

Question in the picture

Mrac [35]

3,3,2 or 5,5,3 Basically just 2 same numbers for the 2 sides of the triangle and 1 other number for the base

3 0

3 years ago

Read 2 more answers

Answer this with the whole chart filled in for more points and brainliest

kiruha [24]

(-5,7) Quadrant 2
(5,-18) Quadrant 4
(10,6) Quadrant 1
(-6,-4) Quadrant 3
(-2,6) Quadrant 2
(2,-6) Quadrant 4
(-10,-13) Quadrant 3
(-4,0) x axis
(0,5) y axis

3 0

3 years ago

What does 3x2 + 9x − 30

Harlamova29_29 [7]

Answer:38

Step-by-step explanation:

7 0

3 years ago