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2 years ago

What is equivalent to the expression 3x^2+27

Mathematics

1 answer:

MA_775_DIABLO [31]2 years ago

6 0

Please give brainliest

Answer: 3(x^2+9)

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A sample of male and female smartphone users were asked to name their favorite type of app from the list below.

Leni [432]

Answer:

males like sports better

females like cooking apps better

females like shopping apps better

males like gaming apps better

1,555‬ females where asked this question

1,555 males where asked this question

3,110 people in all where asked this question

Step-by-step explanation:

hope this helps! brainlist pls?

4 0

3 years ago

3. Solve the system using elimination (not substitution or matrices). negative 2 x plus y minus 2 z equals negative 8A N D7 x pl

riadik2000 [5.3K]

Elimination Method

$\begin{gathered} -2X+Y-2Z=-8 \\ 7X+Y+Z=-1 \\ 5X+2Y-Z=-9 \end{gathered}$

If we multiply the equation 3 by (-1) we obtain this:

$\begin{gathered} -2X+Y-2Z=-8 \\ 7X+Y+Z=-1 \\ -5X-2Y+Z=9 \end{gathered}$

If we add them we obtain 0, therefore there are infinite solutions. So, let's write it in terms of Z

1. Using the 3rd equation we can obtain X(Y,Z)

$\begin{gathered} 5X=-9-2Y+Z \\ X=\frac{-9-2Y+Z}{5} \\ \end{gathered}$

2. We can replace this value of X in the 1st and 2nd equations

$\begin{gathered} -2\cdot(\frac{-9-2Y+Z}{5})+Y-2Z=-8 \\ 7\cdot(\frac{-9-2Y+Z}{5})+Y+Z=-1 \end{gathered}$

3. If we simplify:

$\begin{gathered} \frac{-9Y+12Z-63}{5}=-1 \\ \frac{9Y-12Z+18}{5}=-8 \end{gathered}$

4. We can obtain Y from this two equations:

$\begin{gathered} Y=-\frac{-12Z+58}{9} \\ \end{gathered}$

5. Now, we need to obtain X(Z). We can replace Y in X(Y,Z)

$\begin{gathered} X=\frac{-9-2Y+Z}{5} \\ X=\frac{-9-2(-\frac{-12Z+58}{9})+Z}{5} \end{gathered}$

6. If we simplify, we obtain:

$X=\frac{-3Z+7}{9}$

7. In conclusion, we obtain that

(X,Y,Z) =

$(\frac{-3Z+7}{9},-\frac{-12Z+58}{9},Z)$

8 0

1 year ago

John left the museum and drove south at a rate of 55 mph. Sally left four hours later driving 10 mph faster than John in an effo

Leona [35]

Answer:

22 hours (B)

Step-by-step explanation:

John's velocity = 55mph

Sally's velocity = 65mph

John's time taken = x

Sally's time taken = x - 4

since they must cover the same distance.

and, distance = vel × time

Sally's vel × time = John's vel × time

55x = 65(x-4)

55x = 65x - 220

-10x = -220

x = 22 hours.

Therefore, Sally catches up after 22 hours

5 0

3 years ago

(-22, -3) and (1, -3)?

just olya [345]

Step-by-step explanation:

$(x1y1) = ( - 22 - 3) \\ (x2y2) = (1 - 3) \\ d = \sqrt{ {x 2 - x1) }^{2} } + {(y2 - y1) }^{2} \\ \sqrt{ {(1 - - 22)}^{2} } + {( - 3 - - 3)}^{2} \\ \sqrt{ {(1 + 22)}^{2} } + {(0)}^{2} \\ \sqrt{ {(23)}^{2} } \\ = 23 \: \: \: \: answer \: \: \: please \: \: supprt \: \: and follow \: \: me$

7 0

2 years ago

5/8 - 4/5 subtract as indicated and express your answer in lowest terms

Nitella [24]

Answer:

-7/40

Step-by-step explanation:

5/8 - 4/5

~Find common denominators

25/40 - 32/40

~Subtract

-7/40

Best of Luck!

4 0

3 years ago