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bazaltina [42]
3 years ago
7

HELP ASAP! AGE PROBLEM!! WILL MARK BRAINLIEST!!!

Mathematics
1 answer:
Gennadij [26K]3 years ago
5 0

Answer:

<u>The present age of the mother is 30 years old</u>

Step-by-step explanation:

Age of Jane = x

Age of Billy = 5x (Billy is five times as old as Jane)

Age of Sara = 15x (Their mother is now three times as old as Billy)

In 2 years Sara will be eight times as old as Jane, therefore:

15x + 2 = 8 (x + 2)

15x + 2 = 8x + 16

15x - 8x = 16 - 2

7x = 14

x = 14/7

x = 2 ⇒ 5x = 10x ⇒ 15x = 30

Jane's present age is 2, Billy's present age is 10 and Sara's present age is 30

<u>The present age of the mother is 30 years old</u>

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PLEASE HELP SHOW YOUR WORKING OUT Branliest
Ad libitum [116K]

Answer:

The equation of this line is therefore    y = 2x + 3.

Step-by-step explanation:

this line passes thru the points (0, 3) and (3, 9).  As we move from  (0, 3) to (3, 9), x increases by 3 and y increases by 6.  Thus, the slope of this line is

m = rise / run = 6/3, or m = 2.  Inserting the known info (m = 2, x = 0, y = 3) into y = mx + b, we get:  3 = 2(0) + b, so we see that b = 3.

The equation of this line is therefore    y = 2x + 3.

5 0
3 years ago
3 What is the y-intercept of the line with the equation Y = 1/2 - x - 3?
PSYCHO15rus [73]

Answer:

<h2>a. -3</h2>

Step-by-step explanation:

Given Equation :

y =  \frac{1}{2} x - 3

Which is in slope intercept form :

y = mx + b

Where :

m = slope

b = y-intercept.

Thus , in the given Equation , the y-intercept is -3

8 0
3 years ago
Can somebody pls help I’ll mark brainliest
Mnenie [13.5K]
<span><u><em>Answer:</em></u>
64

<u><em>Explanation:</em></u>
The square of any number can be obtained by multiplied the number by itself.
<u>In other words:</u>
square of x = x</span>²<span> = x * x

For the given, we want to get the square of 8. This means that we will <u>multiply 8 by itself.</u>
Therefore:
square of 8 = 8</span>²<span> = 8 * 8 = 64

Hope this helps :)</span>
8 0
3 years ago
Read 2 more answers
12 and 13? I need help please!
ludmilkaskok [199]
I think 12 might be the second one, I'm not sure though!
4 0
3 years ago
Plz help<br> 15 + (-8) =
Effectus [21]

Answer:

7

Step-by-step explanation:

15 + (-8)

7

The answer would be 7 because you are only taking 15 plus negative 8 which would technically be the same as taking 15 minus 8, which would be 7.

Hope this helps! Please mark as brainliest! Thanks! Let me know if you need anymore help! :D

6 0
3 years ago
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