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3 years ago

6

Help anyone?????????????????????:))))))))))))))))

2 answers:

ivanzaharov [21]3 years ago

3 0

The answers are 7.5 , 12 , 27

Amiraneli [1.4K]3 years ago

3 0

Answer:

Step-by-step explanation:

1 cupcake=1.5 dollars

5 cupcakes=5×1.5

=7.5

1.5 dollars=1 cupcake

15 dollars=15/1.5

=10 cupcakes

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Please help!! <br> Solve the system using an augmented matrix. Show all work

marishachu [46]

Answer:

<em>The solution of the system is: $x=2, y=5$ </em>

Step-by-step explanation:

The given system of equations is.......

$-x-3y=-17\\ \\ 2x-6y=-26$

So, the augmented matrix will be: $\left[\begin{array}{cccc}-1&-3&|&-17\\2&-6&|&-26\\\end{array}\right]$

Now, we will transform the augmented matrix to the reduced row echelon form using row operations.

<u>Row operation 1 :</u> Multiply the 1st row by -1. So..........

$\left[\begin{array}{cccc}1&3&|&17\\2&-6&|&-26\\\end{array}\right]$

<u>Row operation 2:</u> Add -2 times the 1st row to the 2nd row. So.......

$\left[\begin{array}{cccc}1&3&|&17\\0&-12&|&-60\\\end{array}\right]$

<u>Row operation 3:</u> Multiply the 2nd row by $-\frac{1}{12}$ . So.......

$\left[\begin{array}{cccc}1&3&|&17\\0&1&|&5\\\end{array}\right]$

<u>Row operation 4:</u> Add -3 times the 2nd row to the 1st row. So........

$\left[\begin{array}{cccc}1&0&|&2\\0&1&|&5\\\end{array}\right]$

Now, from this reduced row echelon form of the augmented matrix, we can get that $x=2$ and $y=5$

So, the solution of the system is: $x=2, y=5$

8 0

3 years ago

Solve the equation. Show your work.<br> 3x = 45

Andrew [12]

3x=45
45:3=15
x=15

good homework

6 0

3 years ago

Read 2 more answers

Two lines, C and D, are represented by the equations given below:

hammer [34]

Given:
line C: y = x + 14
line D: y = 3x + 2

(6,20) or (3,11)

line C: y = 6 + 14 = 20 or y = 3 + 14 = 17
line D: y = 3(6) + 2 = 18 + 2 = 20 or y = 3(3) + 2 = 9 + 2 = 11

(6,20), because both lines pass through this point.

4 0

4 years ago

Whats the answer for 6b+7-2b=1+5b

Alecsey [184]

$Solution,6b+7-2b=1+5b\quad :\quad b=6$

$Steps:$

$6b+7-2b=1+5b$

$\mathrm{Group\:like\:terms}, 6b-2b+7=1+5b$

$\mathrm{Add\:similar\:elements:}\:6b-2b=4b, 4b+7=1+5b$

$\mathrm{Subtract\:}7\mathrm{\:from\:both\:sides}, 4b+7-7=1+5b-7$

$\mathrm{Simplify}, 4b=5b-6$

$\mathrm{Subtract\:}5b\mathrm{\:from\:both\:sides}, 4b-5b=5b-6-5b$

$\mathrm{Simplify}, -b=-6$

$\mathrm{Divide\:both\:sides\:by\:}-1, \frac{-b}{-1}=\frac{-6}{-1}$

$\mathrm{Simplify}, b=6$

$\mathrm{The\:Correct\:Answer\:is\:b=6}$

$\mathrm{Hope\:This\:Helps!!!}$

$\mathrm{-Austint1414}$

3 0

3 years ago

Read 2 more answers

Which fraction is equivalent to 1/6?

CaHeK987 [17]

Answer:

2/8

i think its 2/8

Have a great day !!

5 0

4 years ago

Read 2 more answers