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zlopas [31]
3 years ago
9

A boy is three years than his sister. Three years ago he was two-thirds of his sister's age.What are their present ages?​

Mathematics
2 answers:
k0ka [10]3 years ago
7 0
Answer:Boy 9 years
Girl: 3 years
tangare [24]3 years ago
6 0

Answer: boy 9 years

Girl 3 years

Step-by-step explanation:

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Use technology to find points and then graph the line y=-5(x-5)+1 following the instructions below.
Svetach [21]

Given:

y=-5(x-5)+1

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We can set values of x and then solve for y.

Let us find the values of y when x = 1, 2, 3, 4, 5

\begin{gathered} y=-5(x-5)+1 \\ y=-5(1-5)+1=21 \\ y=-5(2-5)+1=16 \\ y=-5(3-5)+1=11 \\ y=-5(4-5)+1=6 \\ y=-5(5-5)+1=1 \end{gathered}

We now have a set of points:

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Since the given plane is limited to values of 10 and -10, the points that we can plot are the points (4, 6) and (5, 1)

The graph would then look like this:

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1 year ago
1) f(x) = 3x - 4<br> g(x) – x2 + 3x<br> Find f(g(x))
yuradex [85]

Answer:

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Step-by-step explanation:

8 0
3 years ago
Tyla is simplifying the expression 6 - 2x + 5+ 4x here is their work:
Olin [163]
A. You can not add numbers with different variables.

B. 11 + 2x
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2 years ago
If neither a nor b are equal to zero, which answer most accurately describes the product of (a + bi)(a - bi)?
Scrat [10]

Answer:  the correct option is

(D) The imaginary part is zero.

Step-by-step explanation:  Given that neither a nor b are  equal to zero.

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We will be using the following formula :

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From product (i), we get

P\\\\=(a+bi)(a-bi)\\\\=a^2-(bi)^2\\\\=a^2-b^2i^2\\\\=a^2-b^2\times (-1)~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~[\textup{since }i^2=-1]\\\\=a^2+b^2.

So, there is no imaginary part in the given product.

Thus, the correct option is

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3 0
3 years ago
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hodyreva [135]

Answer:

answer in the pic

Step-by-step explanation:

If you have any questions about the way I solved it, don't hesitate to ask me in the comments below ;)

3 0
3 years ago
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