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Sedbober [7]
3 years ago
9

If ab=7 and a+b=6 what is a”squared” + b "squared”

Mathematics
1 answer:
Scorpion4ik [409]3 years ago
4 0

Answer:

a² + b² = 22

Step-by-step explanation:

Note that

(a + b)² = a² + 2ab + b², thus

a² + b² = (a + b)² - 2ab = 6² - (2 × 7) = 36 - 14 = 22

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I really need help on these two questions
Yuri [45]
(4^\frac{1}{3} )^3 =4
(6^ \frac{1}{6} )^6 =6
(3^ \frac{1}{2} )^4 =
multiply \frac{1}{2} by 4 
and then simplify 
3^{2}

so it will be 
4x6x9=216
your answer is d.216
3 0
3 years ago
Find the distance from the point to the line. (-1,-2,1);x=4+4t, y=3+t, z=6-t .The distance is ____ Typn exact answer, using radi
lawyer [7]

Answer:

The distance is<u>  4.726 </u>

Step-by-step explanation:

we need to find the distance from the point to the line

Given:- point (-1,-2,1) and line ; x=4+4t, y=3+t, z=6-t .

used formula d=\frac{|a\times b|}{|a|}

Let point P be (-1,-2,1)

using value t=0 and t=1

The point Q (4 , 3, 6) and R ( 8, 4, 5)

Let a be the vector from Q to R :   a = < 8 - 4, 4 - 3, 5 - 6 > = < 4, 1, -1 >

Let b be the vector from Q to P:    b = < -1 - 4, -2 - 3, 1 - 6> = < -5, -5, -5 >

The cross product of a and b is:

a \times b= \begin{vmatrix} i & j & k\\ 4 &1&-1\\-5 &-5&-5\\ \end{vmatrix}

= -6i+15j-15k

The distance is : d=\frac{\sqrt{(-6)^{2}+(15)^{2}+(-15)^{2}}}{\sqrt{(4)^{2}+(1)^{2}+(-1)^{2}}}

=\frac{\sqrt{36+225+225}}{\sqrt{16+1+1}}

=\frac{\sqrt{36+225+225}}{\sqrt{16+1+1}}

d=\frac{\sqrt{486}}{\sqrt{18}}

≈4.726

Therefore, the distance is<u>  4.726 </u>

3 0
3 years ago
Y = 3x – 21 is it proportional
pochemuha

Answer:

yes  

Step-by-step explanation:

4 0
3 years ago
Which of the following functions has the function rule y = x + 4? {(0, 2), (-2, -6), (1, 5)} {(2, 6), (-3, -7), (0, 4)} {(-3, 1)
egoroff_w [7]
The second answer
{(2,6),(-3,-7),(0,4)}
Hope this helps
8 0
3 years ago
Read 2 more answers
PLEASE HELP ME!!<br> How is the coordinate system used for computers?
AlexFokin [52]
Youtube works wonders. Look it up 
7 0
4 years ago
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