All categories

3 years ago

Maggie's brother is 4 years younger than three times her age. The sum of their ages is 20. How old is Maggie?

Mathematics

1 answer:

makkiz [27]3 years ago

6 0

Maggie would be 6

6•3=18
18-4=14
14+6=20

You might be interested in

Solve for x: (4x + 15) = 24

Goshia [24]

Answer:

x=9/4

Step-by-step explanation:

we have:

(4x + 15) = 24

4x=24-15

4x=9

finally: x=9/4

3 0

3 years ago

Use the following graph of the function f(x) = 2x3 + x2 − 3x + 1 to answer this question: graph of 2x cubed plus x squared minus

Zina [86]

Answer:

Step-by-step explanation:

f(x) = 2x^3 + x^2 − 3x + 1

f'(x) = 6x^2 + 2x − 3

The slope at -2:

f'(-2) = 6(-2)^2 + 2(-2) − 3

f'(-2) = 24 + -4 − 3

f'(-2) = 17

-----

The slope at 0:

f'(0) = 6(0)^2 + 2(0) − 3

f'(0) = − 3

The average rate of change is (17+(-3))/2, or 14/2, or 7

6 0

2 years ago

Read 2 more answers

Karen claps her hand and hears the echo from a distant wall 0.113 s later. How far away is the wall? The speed of sound in air i

insens350 [35]

Answer:

19.3795 m

Step-by-step explanation:

If sound travels at 343 m/s and it took Karen 0.113 s to hear the echo from the wall, the distance travelled by the sound is:

$D=343\frac{m}{s} *0.113\ s\\D= 38.759\ m$

Note that the distance calculated above is the distance travelled from Karen to the wall and then back from the wall to Karen. Therefore, the distance between Karen and the wall is:

$d=\frac{38.759}{2}\\d=19.3795\ m$

The wall is 19.3795 m away from Karen.

3 0

3 years ago

Real world situation for 834+14s>978-10s

liraira [26]

834+14s=848>978-10s=968

a real life situation for that could be like how many apples 848apples/968total

6 0

3 years ago

Ryan gets an allowance of $9 a week which he deposits into his bank account where he already has $45 he wants to buy some shoes

Stells [14]

Answer:

Step-by-step explanation:

First add the shoes and the toys: 63+54 = $117

Second subtract 45 dollars from $117 = 72

Third divide 72 by 9 = 8 weeks

Answer: 8 weeks

5 0

3 years ago