2 years ago

Solve the system of equations -3x-5y=-16 and 4x+6y=16

Mathematics

1 answer:

Ann [662]2 years ago

7 0

Answer:

x=-56 y=80

Step-by-step explanation:

solved with delta way

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Y = (x + 1)(x - 2)<br> Distribution

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3 years ago

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The width of a rectangle is the length minus 3 units.The area of the rectangle is 10 units. What is the width, in units, of the

labwork [276]

Answer:

2 units

Step-by-step explanation:

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2 years ago

bryan has some 3 cent stamps and some 4 cent stamps. what is the least number of stamps he can combine so the value of the stamp

SashulF [63]

Answer:

The least number of stamps required is $9$

Step-by-step explanation:

Let the number of $3$ cent stamps be $x$ and $4$ cent stamps be $y$

We have

$3x+4y=33$

The minimum number is obtained when more $4$ cent stamps are used

Here $y$ cannot be greater than $8$ since $\frac{33}{4}$

Substitute $y=8$

$3x+4\times 8=33\\\\3x=1\\\\x=\frac{1}{3}$

Not possible since $x$ is not a fraction

Substitute $y=7$

$3x+4\times 7=33\\\\3x=5\\\\x=\frac{5}{3}$

Not possible since $x$ is not a fraction

Substitute $y=6$

$3x+4\times 6=33\\\\3x=9\\\\x=\frac{9}{3}\\\\=3$

Possible

Hence minimum number of stamps is

$=x+y\\\\=3+6\\\\=9$

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2 years ago