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ad-work [718]
2 years ago
14

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 &lt; 0.5x +<br>2? Select three options.​
zubka84 [21]

Answer:

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

Step-by-step explanation:

<em>T</em><em>h</em><em>a</em><em>n</em><em>k</em><em>s</em><em> </em><em>y</em><em>o</em><em>u</em>

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
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