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4 years ago

What is 1.21 repeating as a fraction?

Mathematics

2 answers:

OlgaM077 [116]4 years ago

3 0

121/100 is the fraction form

katovenus [111]4 years ago

3 0

Your answer is 40/33.

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The length of a freeway is 600 miles. If 0.5 inch represents 50 miles, what is the length of the freeway on the map?

trasher [3.6K]

600/50 = 12
12/2= 6 inches

6 0

3 years ago

Read 2 more answers

Solve the system of equations by finding the reduced row-echelon form of the augmented matrix for the system of equations.

hram777 [196]

Write the system in augmented-matrix form:

$\left[\begin{array}{ccc|c}2&2&4&16\\5&-2&3&-1\\1&2&-3&-9\end{array}\right]$

Multiply through row 1 by 1/2:

$\left[\begin{array}{ccc|c}1&1&2&8\\5&-2&3&-1\\1&2&-3&-9\end{array}\right]$

Add -1(row 1) to row 3, and add -5(row 1) to row 2:

$\left[\begin{array}{ccc|c}1&1&2&8\\0&-7&-7&-41\\0&1&-5&-17\end{array}\right]$

Swap rows 2 and 3:

$\left[\begin{array}{ccc|c}1&1&2&8\\0&1&-5&-17\\0&-7&-7&-41\end{array}\right]$

Add -7(row 2) to row 3:

$\left[\begin{array}{ccc|c}1&1&2&8\\0&1&-5&-17\\0&0&-42&-160\end{array}\right]$

Multiply through row 3 by -1/42:

$\left[\begin{array}{ccc|c}1&1&2&8\\0&1&-5&-17\\0&0&1&\frac{80}{21}\end{array}\right]$

Add 5(row 3) to row 2:

$\left[\begin{array}{ccc|c}1&1&2&8\\0&1&0&\frac{43}{21}\\0&0&1&\frac{80}{21}\end{array}\right]$

Add -1(row 2) and -2(row3) to row 1:

$\left[\begin{array}{ccc|c}1&0&0&-\frac53\\0&1&0&\frac{43}{21}\\0&0&1&\frac{80}{21}\end{array}\right]$

So the solution to the system is

$x=-\dfrac53,y=\dfrac{43}{21},z=\dfrac{80}{21}$

7 0

4 years ago

Read 2 more answers

Anna gets paid $8.75/hour working as a barista at Coffee Break. Her boss pays her $9.00/hour for creating the weekly advertiseme

vladimir1956 [14]

Answer:

i believe it would be $443.75

Step-by-step explanation:

just add 8.75 to 9.00 then multiply it by 25

8.75+9.00= 17.75 x 25= 443.75

if its a different type of equation then maybe this didn't help but i hope it does

7 0

4 years ago

In the Mississippi River Delta, fresh water (0% salinity) mixes with salt water from the Gulf of Mexico (3 1 2% salinity). If 1,

Rina8888 [55]

Answer:

The total resulting gallons of water is 4,000 gallons

The concentration of the resulting solution is 2.625% salinity

Step-by-step explanation:

The salinity of the fresh water from the Mississippi River Delta = 0%

The salinity of the water from the Gulf of Mexico = 3 1/2%

Therefore, if 1,000 gallons of river water mixes with 3,000 gallons from the Gulf, we have;

The total resulting gallons of water = 1,000 + 3,000 = 4,000 gallons

The total resulting gallons of water = 4,000 gallons

The concentration of the resulting solution is found as follows;

The concentration of the resulting solution = (3 × 3 1/2)/400 × 100 = 2.625%

The concentration of the resulting solution = 2.625% salinity.

8 0

3 years ago

A certain natural number is not divisible by 7. Can it be divisible by 14, explain why or why not

Elanso [62]

For a number to be divisible by 14 it needs to be both divisible by 7 and 2 which are factors of 14. Every time you have a number (x) to check if it is divisible by some larger number you find the factor of that larger number and check is the x divisible by both.

Answer: it cannot be divisible by 14.

3 0

4 years ago