All categories

3 years ago

I NEED HELP WITH MY FINALL

Mathematics

2 answers:

sweet [91]3 years ago

5 0

what you need help with?

JulijaS [17]3 years ago

4 0

Answer:

it takes 2.56 (or 2 14/25) months

Step-by-step explanation:

Edmond has $45 in his saving account. He wants to purchase a computer that costs $768. He starts to babysit for his cousin and gets paid $90/week. He plans to spend some money and deposit $75/ week in his account. Define a variable and write an equation and solve to find how many months it takes for him to buy the computer. Assume that every month has 4 weeks

Even though Edmond is getting $90 a week, he's only depositing $75

Based on this information your equation would be:

75w = $768 where w = week

To solve that divide 75 by 768

w = 10.24 or 10 6/25

If there are 4 weeks in a month then your new equation would be

w/4 = m where m = months

To solve this, substitute w for 10.24 or 10 6/25

(10.24)/4 = m

m = 2.56 or 2 14/25

You might be interested in

1 peck= how many quarts

Fynjy0 [20]

Answer:

9.30918

Step-by-step explanation:

3 0

2 years ago

Explain why it is usually only necessary to test one point when graphing an inequality

Mars2501 [29]

Because if that point is true than everything on that side of the number line is true. Visa versa.

4 0

3 years ago

2. Solve the system of equations. Write your answer in parametric vector notation. X, +5x2 + 4x3 + 3x4 +9xs = 18 2x, +6x2 + 4x3

ratelena [41]

Answer:

The system is inconsistent.

Step-by-step explanation:

The system is

$x_1+5x_2+4x_3+3x_4+9x_5=18\\2x_1+6x_2+4x_3+6x_4+6x_5=28\\3x_1+7x_2+4x_3+10x_4+x_5=41\\4x_1+6x_2+2x_3+7x_4+4x_5=29$

The associated matrix to the system is

$\left[\begin{array}{cccccc}1&5&4&3&9&18\\2&6&4&6&6&28\\3&7&4&10&1&41\\4&6&2&7&4&29\end{array}\right]$

Now we use row operations to find the echelon form of the matrix:

1. We substract to row 2, two times the row 1.

We substract to row 3, three times the row 1.

We substract to row 4, four times the row 1 and obtain the matrix

$\left[\begin{array}{cccccc}1&5&4&3&9&18\\0&-4&-4&0&-12&-8\\0&-8&-8&1&-26&-13\\0&-14&-14&-5&-32&-43\end{array}\right]$

2. We multiply the second row of the preview step by -1/4. We obtain the matrix

$\left[\begin{array}{cccccc}1&5&4&3&9&18\\0&1&1&0&3&2\\0&-8&-8&1&-26&-13\\0&-14&-14&-5&-32&-43\end{array}\right]$

We add to row 3, eight times the row 2.

We add to row 4, fourtheen times the row 2 and obtain the matrix

$\left[\begin{array}{cccccc}1&5&4&3&9&18\\0&1&1&0&3&2\\0&0&0&1&-2&3\\0&0&0&-5&10&-155\end{array}\right]$

4. We add to row 4 of the preview step, five times the row 3 and obtain the matrix

$\left[\begin{array}{cccccc}1&5&4&3&9&18\\0&1&1&0&3&2\\0&0&0&1&-2&3\\0&0&0&0&0&-140\end{array}\right]$

Using backward substitution we have that

$0x_5=-140$ , then $0=-140$ and this is absurd. Then The system is inconsistent.

4 0

3 years ago

Arrange the following fraction in descending order 1/2 5/7 1/4 or 1/8 11/12

blsea [12.9K]

Answer:

11/12, 5/7, 1,8, 1/4, 1/2

Step-by-step explanation:

6 0

2 years ago

12.2 ounces of chocolate O”s for $2.42

Pie

Answer:

If the person bout one box of chocolate O's than they paid $2.2 for 12 ounces

3 0

3 years ago