All categories

2 years ago

elie is now 4 times as old as her son. in 5 years time shes going to be 3 times as old as her son. how old is ellies son now?

Mathematics

1 answer:

tigry1 [53]2 years ago

5 0

Answer:

Her son is 10 years old.

Step-by-step explanation:

Let son be x

Ellie is 4x

In 5 years time: Her son = x + 5

Ellie = 4x + 5

Given that she will then be 3 times as old as her son: 4x + 5 = 3(x + 5)

Solve x: 4x + 5 = 3(x + 5) ,4x + 5 = 3x + 15

x = 10

You might be interested in

I beg for help i will award brainlist

Luden [163]

Answer:

the answer 61 cups of chocolate

Step-by-step explanation:

briniest please

5 0

2 years ago

Find the surface area and volume of a cube with sides of 5.5 cm each.

djyliett [7]

Answer:

Area: 181.5

Volume: 166.4

Step-by-step explanation:

Hope this helps.

6 0

2 years ago

Question - Find each f(c) using synthetic substitution. f(x) =5x 5 + 10x 4 + 3x 3 + 8x 2 – 6x – 3; c = 3

SpyIntel [72]

Answer:

2157

Step-by-step explanation:

The given function is

$f(x)=5x^5+10x^4+3x^3+8x^2-6x-3$

We want to find f(c) when c=3.

This means the remainder when f(x) is divided by x-3

We perform the synthetic division:

5 10 3 8 -6 -3

3| 15 75 234 726 2160

5 25 78 242 720 2157

Therefore the remainder is 2157

You are right

7 0

2 years ago

Am I d u m b or what?

jok3333 [9.3K]

Answer:

w=3

Step-by-step explanation:

3w= 9

divide 3 on both sides

3/3 = 9/3

3/3 cancels out

9/3 = 3

8 0

1 year ago

Read 2 more answers

100 POINTS! PLEASE HELP!

lesantik [10]

Answer:

$y=-4x+5$

Step-by-step explanation:

Step 1: Find the slope

$m=\frac{y_2-y_1}{x_2-x_1}$

$m=\frac{13-5}{-2-0}$

$m=-\frac{8}{2}$

$m=-4$

Step 2: Use point slope form

$(y-5) = -4(x-0)$

$y-5 + 5=-4x + 5$

$y=-4x+5$

Answer: $y=-4x+5$

4 0

2 years ago

Read 2 more answers