2 years ago

I need to know if this is correct

Mathematics

1 answer:

Law Incorporation [45]2 years ago

7 0

Yes its right
hope this helps

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A grandfather is six times as old as his grandson. If the grandfather was 45 when his grandson was born, how old is the grandson

Semenov [28]

The grandson is 9 years old.

This would mean that the grandpa is 54.

9x6=54
54/6=9

5 0

2 years ago

What slope of a line that passes through (4, -1) and (2,9)

pickupchik [31]

Answer:

-5

Step-by-step explanation:

The slope is given by

m= (y2-y1)/(x2-x1)

= (9 - -1)/ ((2 - 4)

= (9+1)/(2-4)

= 10/-2

= -5

3 0

2 years ago

Read 2 more answers

Suppose a and b are both non zero real numbers. Find real numbers c and d such that 1/a+ib= c+id

Thepotemich [5.8K]

$\begin{gathered} c=\frac{a}{a^2+b^2} \\ d=\frac{-b}{a^2+b^2} \end{gathered}$

Explanation

$\frac{1}{a+bi}=c+di$

Step 1

multiplicate by the conjugate

$\begin{gathered} \frac{1}{a+bi}\cdot\frac{a-bi}{a+bi}=\frac{a-bi}{(a+bi)(a-bi)}=\frac{a-bi}{a^2-(bi)^2} \\ \frac{1}{a+bi}\cdot\frac{a-bi}{a+bi}=\frac{a-bi}{(a+bi)(a-bi)}=\frac{a-bi}{a^2-(-b^2)}=\frac{a-bi}{a^2+b^2} \end{gathered}$

notice that

$\begin{gathered} \frac{1}{a+bi}=\frac{a-bi}{a^2+b^2}=\frac{a}{a^2+b^2}-\frac{b}{a^2+b^2}i \\ \frac{a}{a^2+b^2}-\frac{b}{a^2+b^2}i=c+di \\ so \\ \end{gathered}$ $\begin{gathered} c=\frac{a}{a^2+b^2} \\ d=\frac{-b}{a^2+b^2} \end{gathered}$

I hope this helsp you

6 0

1 year ago

Which points are solutions to the linear inequality y < 0.5x + 2? Select three options.

zubka84 [21]

Answer:

● (1, -2) sana maka tulong pang apat po yan sa baba

Step-by-step explanation:

Thanks you

6 0

2 years ago

Read 2 more answers

Of his 94 compact discs, Raul plans to donate 17 to the thrift store. To the nearest tenth of a percent, what percent is this?

Masteriza [31]

For this case we can solve the problem by means of the following rule of three:
94 --------> 100%
17 --------> x
Clearing x we have:
x = (17/94) * (100)
x = 18,08510638%
To the nearest tenth of a percent:
x = 18.1%
Answer:
This is 18.1% of his compact discs.

6 0

3 years ago