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3 years ago

Which linear system of equations does the matrix represent 4 -7 -14 4 -12 4

Mathematics

1 answer:

Novosadov [1.4K]3 years ago

4 0

The given matrix represent the following linear system

4x - 7y = -12
-14x + 4y = 4

Good luck!!!

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Carmita bought 20 pizzas for a party, An hour after the party started, 2/7 of the pizzas had been eaten. How many pizzas had bee

lora16 [44]

Answer: 5 5/7

Step-by-step explanation:

Number of pizza bought = 20

Fraction of pizza ate = 2/7

Therefore, the number of pizzas that have been eaten will be:

= Fraction of pizza eaten × Number of pizza bought

= 2/7 × 20

= 40/7

= 5 5/7

Therefore, 5 5/7 pizza have been eaten

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3 years ago

You need at least 5 pounds of potatoes and onions. Potatoes cost $4 per pound and onions $2. You can spend at the most $18.

malfutka [58]

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4 years ago

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6y + 40 = 100<br> What is y?

Fantom [35]

$\begin{gathered}\\ \sf\longmapsto 6y+40=100\end{gathered}$

$\begin{gathered}\\ \sf\longmapsto 6y=100-40\end{gathered}$

$\begin{gathered}\\ \sf\longmapsto 6y=60\end{gathered}$

$\begin{gathered}\\ \sf\longmapsto ⚘y=10\end{gathered}$

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3 years ago

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What is 175 twenty fourths simplified

muminat

Do you mean this number:

$175 \frac{20}{4}$ ?

The we have to simplify the fraction part, since the nominator is bigger than the denominator.

How many denominators fit into the nominator? 20: 4=5

5! so $\frac{20}{4}$ is simply 5 and we can add it to the main number:

175+5=180

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4 years ago

The polynomial x^2-18x+81 represents the area(in square feet) of a square courtyard. Write an expression for the perimeter of th

vovangra [49]

Answer:

4x - 36 feet

Step-by-step explanation:

The area A of a square whose sides are s units is given as

A = s * s

Given that the area A = x^2-18x+81, factorizing

A = x^2-9x-9x+81

A= x(x-9)-9(x-9)

A = (x-9)(x-9)

A = (x-9)^2

This means that the size of each side of the square courtyard is x-9 feet long

Recall that the perimeter P of a square whose side is s long is given as

P = 4s hence since the side of the courtyard is x - 9 feet, the perimeter of the courtyard

P = 4(x-9)

= 4x - 36 feet

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3 years ago