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3 years ago

6

kevin is making a banner with an area of 7 square feet. the width and length of the banner are whole numbers. what are its possi

ble dimensions

1 answer:

Helga [31]3 years ago

5 0

There are no two whole numbers that multiply to 7. Multiplication is how you get an area on 2D items. 7 is a prime number.

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21) Martha's aunt bought $26 for 20 plants. Some were

a_sh-v [17]

Answer:

8 carnations and 12 zinnias

Step-by-step explanation:

4 0

3 years ago

Aaaaaaaaahahahahahqq What’s the answer?

Svetllana [295]

Answer:

2.5

Step-by-step explanation:

-2+5 equals 3-8= -5 divided by 2 equals -2.5

Second DUDE YOU NEED TO CHILL-ANYBODY WHO SEES THIS-RATE THIS FIVE STARS IF YOU THINK THIS GUY NEEDS TO CHILL!!!

8 0

4 years ago

Find the solution to this system of equations <br> 3x+2y+3z=3 4x-5y+7z=1 2x+3y-2z=6 <br> x=? Y=? Z=?

Ede4ka [16]

Answer:

The solution is $x=2,\ y=0,\ z=-1.$

Step-by-step explanation:

You are given the system of three equations:

$\left\{\begin{array}{l}3x+2y+3z=3\\4x-5y+7z=1\\2x+3y-2z=6\end{array}\right.$

Multiply the first equation by 4, the second equation by 3 and subtract them. Then multiply the third equation by 2 and subtract it from the second equation:

$\left\{\begin{array}{l}3x+2y+3z=3\\4(3x+2y+3z)-3(4x-5y+7z)=4\cdot 3-3\cdot 1\\4x-5y+7z-2(2x+3y-2z)=1-2\cdot 6\end{array}\right.\Rightarrow \\\\\left\{\begin{array}{l}3x+2y+3z=3\\12x+8y+12z-12x+15y-21z=12-3\\4x-5y+7z-4x-6y+4z=1-12\end{array}\right.$

So,

$\left\{\begin{array}{rl}3x+2y+3z=3\\23y-9z=9\\-11y+11z=-11\end{array}\right.\Rightarrow \left\{\begin{array}{l}3x+2y+3z=3\\23y-9z=9\\y-z=1\end{array}\right.$

Multiply the third equation by 23 and subtract it from the second equation:

$\left\{\begin{array}{rl}3x+2y+3z=3\\23y-9z=9\\23y-9z-23(y-z)=9-23\cdot 1\end{array}\right.\Rightarrow \left\{\begin{array}{rl}3x+2y+3z=3\\23y-9z=9\\23y-9z-23y+23z=9-23 \end{array}\right.$

Hence,

$\left\{\begin{array}{rl}3x+2y+3z=3\\23y-9z=9\\14z=-14 \end{array}\right.\Rightarrow z=-1$

Substitute it into the second equation:

$23y-9\cdot (-1)=9\Rightarrow 23y+9=9\\ \\23y=0\\ \\y=0$

Substitute them into the first equation:

$3x+2\cdot 0+3\cdot (-1)=3\Rightarrow 3x-3=3\\ \\3x=6\\ \\x=2$

The solution is $x=2,\ y=0,\ z=-1.$

3 0

4 years ago

Dante has been putting one penny in his bank every day. Now he has 161 pennies. For how many weeks has Dante been adding pennies

Bad White [126]

He has been adding pennies for 23 weeks. 161 / 7 = 23.

6 0

4 years ago

Read 2 more answers

What is the slope and y-intercept of x/3= -y+2 and how?????

Katarina [22]

Subtract 2 from both sides

then you get -y equals 1/3x -2 so you have to flip the sign of the entire equation because you can’t have a negative line

so you get y = -1/3x + 2

the y-intercept is (0,2)

the slope is -1/3x (aka -x/3)

6 0

3 years ago