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3 years ago

Parker simplified the expression y2-5 (y+y2+8y+16/y+4)-12 as shown below. Which statement best describes Parker's error?

Mathematics

2 answers:

alex41 [277]3 years ago

4 0

Answer:

he distributed -5 incorrectly

Orlov [11]3 years ago

3 0

Answer:

D one Edge 2021 ;))

Step-by-step explanation:

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- 3m + 7 - 2n<br><br><br> Can I get the answer

Aleks [24]

Answer:

3m + 5

Step-by-step explanation:

uhmm i think 2n is i cant solve here hope it helps

3 0

2 years ago

You read 8 pages in 4 minutes how many pages can you read in 4 hours

kotegsom [21]

2 pages a minute

1 hr = 60 min
and so 1 hr = 120 pages
within 4 hrs you would read 120 x 4 pages

that means in 4 hrs you read 480 pages

hope this helps :D

4 0

4 years ago

Read 2 more answers

Solve this system by elimination : -5x + 3z =8 x- 4y = 7 5y - 4z = -14 find the x , y and z using elimination

Mnenie [13.5K]

Answer

• x = –1

• y = –2

• z = 1

Explanation

Given the system:

$\begin{gathered} -5x+3z=8\text{, equation 1} \\ 5y-4z=-14,\text{ equation 2} \\ x-4y=7,\text{ equation 3} \end{gathered}$

We have to divide equation 1 over 5 and add it to equation 2:

$\begin{gathered} -(5x)+0y+3z=8 \\ x-4y+0z=7 \\ 0x+5y-4z=-14 \end{gathered}$ $\begin{gathered} \frac{-(5x)+0y+3z=8}{5} \\ x-4y+0z=7 \\ 0x+5y-4z=-14 \end{gathered}$ $\begin{gathered} -x+0y+\frac{3}{5}z=\frac{8}{5} \\ x-4y+0z=7 \\ 0x+5y-4z=-14 \end{gathered}$

Now, we have to add 1/5(equation 1) to equation 2:

$\begin{gathered} -x+0y+\frac{3}{5}z=\frac{8}{5} \\ x-4y+0z=7 \\ --------- \\ 0x-4y+\frac{3}{5}z=\frac{43}{5} \end{gathered}$

Next, we multiply the equation 2 obtained previously times 5:

$\begin{gathered} (0x-4y+\frac{3}{5}z=\frac{43}{5})\cdot5 \\ -20y+3z=43 \end{gathered}$

Then, we divide equation 2 over 4:

$\begin{gathered} \frac{-20y+3z=43}{4} \\ -5y+\frac{3}{4}z=\frac{43}{4} \end{gathered}$

We add it to equation 3:

$\begin{gathered} -5y+\frac{3}{4}z=\frac{43}{4} \\ 5y-4z=-14 \\ ------- \\ 0y-\frac{13}{4}z=-\frac{13}{4} \end{gathered}$

Then, we are left with:

$\begin{equation*} -\frac{13}{4}z=-\frac{13}{4} \end{equation*}$

Simplifying:

$-13z=-13$ $z=\frac{-13}{-13}=1$ $z=1$

Now that we have the value of z (z = 1), we can replace it in the modified equation 2 and solve for y:

$-20y+3z=43$ $-20y+3(1)=43$ $-20y+3=43$ $-20y=43-3$ $-20y=40$ $y=\frac{40}{-20}$ $y=-2$

Finally, calculating the value of x with any of the equations (as we already have the other two values):

$x-4(-2)=7$ $x+8=7$ $x=7-8$ $x=-1$

5 0

2 years ago

A recipe calls for 4/5 cups of sugar for every 3/8 cups of flour. How much flour would you need to mix with 5 cups of sugar?

raketka [301]

Answer:

i believe the answer to "A recipe calls for 4/5 cups of sugar for every 3/8 cups of flour. How much flour would you need to mix with 5 cups of sugar?" is 0.3 tell me if this works i am sorry if it does not good luck

Step-by-step explanation:

i did 4/5 x 3/8

8 0

3 years ago

What is the mean of the numbers 5,5,7,5,9,11,18?

AlekseyPX

It would be 6/7. Because first you would add 5+5+7+5+9+11+18 which equals 60. After that, you would divide 60 to 7. You should get 6/7. I hope this helped you!

5 0

3 years ago

Read 2 more answers