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2 years ago

True or False: Both equations have 'no solutions'. 15x +4-2x = 3(6x + 5) (2x-8)=(8x+36)

Mathematics

2 answers:

andrew11 [14]2 years ago

8 0

Answer:

False

Step-by-step explanation:

They both have 1 solution

15x + 4 = 3(6x +5)

15x +4 = 18x + 15 Multiple everything in the parentheses by 3.

4 = 3x + 15 Subtract 15 x from both sides

-11 = 3x Subtract 15 from both sides

-11/3 = x Divide both sides by 3

There is only one solution for this equation.

2x -8 = 8x + 36

-8 = 6x + 36 Subtract 2x from both sides

--44 = 6x Subtract 36 from both sides

-44/6 = x Divide both sides by 6.

There is only one solution for this equation.

skelet666 [1.2K]2 years ago

7 0

Answer:

false

Step-by-step explanation:

They both have solutions

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Create a matrix that is equal to F+G. The first matrix below is named F and the second matrix below is named G. Name the new mat

likoan [24]

F+G:

$F+G=\begin{bmatrix}{-1.8} & {-8.6} & {} \\ {2.85} & {-1.4} & {} \\ {-1.8} & {5.1} & {}\end{bmatrix}+\begin{bmatrix}{1.32} & {-1.9} & {} \\ {2.25} & {0.0} & {} \\ {-6.2} & {1.4} & {}\end{bmatrix}$

Then, add the elements that occupy the same position:

$H=\begin{bmatrix}{-1.8+1.32} & {-8.6+(-1.9)} & {} \\ {2.85+2.25} & {-1.4+0.0} & {} \\ {-1.8+(-6.2)} & {5.1+1.4} & {}\end{bmatrix}$

Solve

$H=\begin{bmatrix}{-0.48} & {-10.5} & {} \\ {5.1} & {-1.4} & {} \\ {-8} & {6.5} & {}\end{bmatrix}$

So, we find the element at address h31:

$H=\begin{bmatrix}{h11} & {h12} & {} \\ {h21} & {h22} & {} \\ {h31} & {h32} & {}\end{bmatrix}$

In this case, position h31 is - 8.0

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1 year ago

Mrs.Baca uses a phone card to call her relatives in Colombia.It costs her 45 cents to talk for 15 minutes.How long can she talk

zysi [14]

45/15= 3

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3 years ago

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SVETLANKA909090 [29]

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3 years ago

Can anyone help me with this?

Vika [28.1K]

Answer:

x = 51

Step-by-step explanation:

The figure shown is a pentagon

The angles in a pentagon add up to equal 540

Which means that 77 + 107 + 156 + 149 + x = 540

^ ( note that we just created an equation that we can

use to solve for x )

We then solve for x using that equation

77 + 107 + 156 + 149 + x = 540

step 1 combine like terms

77 + 107 + 156 + 149 = 489

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step 2 subtract 489 from each side

489 - 489 cancels out

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we're left with x = 51

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Answer:

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Step-by-step explanation:

Its correct for Khan Academy:)

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