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SOVA2 [1]
3 years ago
13

Christy is three times as old as he was 8 years ago . How old is she now?

Mathematics
1 answer:
Svetradugi [14.3K]3 years ago
4 0

Answer:

12 years old

3 times older. Subtract 1 to count for her age before. 3-1=2

8/2=4 so 4 her younger age

4 + 8 = 12

Hope this helps. She is 12 years old.

Step-by-step explanation:

You might be interested in
Same as my other question If one kilogram is 2.2 pounds. How many kilograms is 5.5 pounds?
Dvinal [7]

Answer:

2.5 kilograms

Step-by-step explanation:

Since 2 kilograms would be 4.4 pounds, subtract 4.4 from 5.5.

Then, you'd get 1.1

So, since 1.1 is half of 2.2, you can assume that 1.1 is half of a kilogram.

Then, add half a kilogram with 2 kilograms to get 2.5 kilograms.

Hope this helps!

3 0
3 years ago
Given the trinomial, what is the value of the coefficient B in the factored form? 2x2 + 4xy − 48y2 = 2(x + By)(x − 4y) −12 12 −6
Sonja [21]

Answer:

B is 6.

Step-by-step explanation:

We are trying to find a value for B such that:

2x^2+4xy-48y^2=2(x+By)(x-4y) is true for every x,y.

So let's choose x=0,y=1:

2(0)^2+4(0)(1)-48(1)^2=2(0+B(1))(0-4(1))

2(0)+0-48=2(B)(-4)

0-48=-8B

-48=-8B

Divide both sides by -8:

\frac{-48}{-8}=B

6=B

B=6

Note: I didn't want to choose y to be 0 because the value of B would disappear from the equation. So you should be able to have chosen any x and y except for y=0 to solve the equation for B.

Check:

So let's check and use foil to multiply out the right hand side.

(x+6y)(x-4y)

x(x)+x(-4y)+6y(x)+6y(-4y)

x^2-4xy+6xy-24y^2

x^2+2xy-24y^2

There was a 2 in front of that multplicapltiation:

2(x+6y)(x-4y)

2(x^2+2xy-24y^2)

2x^2+4xy-48y^2

This is exactly what we have on the left hand side of your given equation.

3 0
3 years ago
What is the length of line RS? I don't understand how to get it.
romanna [79]

The way to get the length of RS is actually very simple. You see how there is a number 17 in the line? You take that and it should mean every area where a line should be is 17. So, R is 17, the 2nd line is 17, M is 17, the 4th line is 17, and S is 17. So you then multiply 17 times 5 and get 85.

-Mabel <3

(Sorry if this is incorrect! <3)

8 0
3 years ago
Median math questionS
Nimfa-mama [501]

Answer:

Step-by-step explanation:

average 30

36+12+25+40+10+54+?=

177+?==ortalamax days

177+?=7*30

177+?=210

?=33

3 0
3 years ago
Which quantity is proportional to 12/15?
Iteru [2.4K]

4/5

Find common fractions of 12/15

12 / 15. each part divided by 3

15 / 3 = 5...12 / 3 = 4...12/15 = 4/5

6 0
3 years ago
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