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3 years ago

13

What is the solution of the following system of linear equations? y = x - 7 2y + x=1

1 answer:

andrew-mc [135]3 years ago

5 0

Answer:

x=5

y=-2

Step-by-step explanation:

I just took this!

Hope I helped

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Sergio makes belts in his garage.He makes a certain number of belts for every hour he works.what is the missing value in the tab

Gwar [14]

12 it's adds ×÷2 ( 8÷2=4) and then add the two numbers (8&4)

5 0

3 years ago

before getting to school john has a few errands to run john has to walk 5 blocks to the galley and 9 blocks to the library befor

Serggg [28]

Answer:

9 blocks

Step-by-step explanation:

The total of what John has already walked and the number more he must walk will be equal to the number he has to walk to get to school.

12 + more = 5 + 9 + 7

more = 9 + 5 + 7 - 12 . . . . . subtract 12 from both sides

more = 9

John must walk 9 blocks more.

_____

We recognize that 5+7 = 12, so that last part of the sum totals zero.

6 0

2 years ago

Find all complex solutions of 5x^2+5x+3=0.

oksian1 [2.3K]

Answer:

see explanation

Step-by-step explanation:

5x² + 5x + 3 = 0 ← in standard form

with a = 5 , b = 5 , c = 3

Solve using the quadratic formula

x = $\frac{-b+/-\sqrt{b^2-4ac} }{2a}$

= $\frac{-5+/-\sqrt{5^2-(4(5)(3)} }{2(5)}$

= $\frac{-5+/-\sqrt{25-60} }{10}$

= $\frac{-5+/-\sqrt{-35} }{10}$

= $\frac{-5+/-\sqrt{-1(35)} }{10}$

= $\frac{-5+/-i\sqrt{35} }{10}$

Then

x = $\frac{-5}{10}$ ± $\frac{1}{10}$ i $\sqrt{35}$ , that is

x = - $\frac{1}{2}$ - $\sqrt{x} \frac{1}{10}$ i $\sqrt{35}$ , - $\frac{1}{2}$ + $\frac{1}{10}$ i $\sqrt{35}$

5 0

3 years ago

T F IfA and B are similar matrices, then AT=BT

muminat

Answer:

Step-by-step explanation:

We know that for two similar matrices $A$ and $B$ exists an invertible matrix $P$ for which

$[tex]B = P^{-1} AP$ [/tex]

∴ $B^{T} = (P^{-1})^{T} A^{T} P^{T} \\$

Also $P^{-1}P = I\\$

and $(P^{-1})^{T} = (P^{T})^{-1}$

∴ $(P^{-1})^{T}P^{T} = I$

so, $B^{T} = (P^{-1})^{T} A^{T} P^{T} = (P^{T})^{-1}A^{T} P^{T}\\B^{T} = A^{T} I\\B^{T} = A^{T}$

7 0

3 years ago

Work out the surface area of this solid prism.

zhannawk [14.2K]

THE SURFACE AREA IS 3220CM^2

3 0

2 years ago