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3 years ago

11

Alex thinks of a number. he squares it, then takes away five .Next multiplies it by 4 ,takes away seven, divides it by three ,an

d finally adds six his answer is nine what number did he start with

2 answers:

ICE Princess25 [194]3 years ago

6 0

Answer:

3

Step-by-step explanation:

start with the ending answer and go backwards

kykrilka [37]3 years ago

5 0

Answer:

3.

Step-by-step explanation:

.

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What’s 325 devied by 13 and how do you solve it helpppp

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Answer:

the answer is 25

Step-by-step explanation:

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3 years ago

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Starting at home, Luis traveled uphill to the gift store for 50 minutes at just 6 mph. He then traveled back home along the same

mario62 [17]

Average speed for the entire trip, both ways, is

   (Total distance) divided by (total time) .

We don't know the distance from his house to the gift store,
and we don't know how long it took him to get back.
We'll need to calculate these.

-- On the trip TO the store, it took him 50 minutes, at 6 mph.
-- 50 minutes is 5/6 of an hour.
-- Traveling at 6 mph for 5/6 of an hour, he covered 5 miles.
-- The gift store is 5 miles from his house.
-- The total trip both ways was 10 miles.

-- On the way BACK home from the store, he moved at 12 mph.
-- Going 5 miles at 12 mph, it takes (5/12 hour) = 25 minutes.

Now we have everything we need.

Distance:
   Going:    5 miles
   Returning: 5 miles
   Total    10 miles

Time:
   Going:    50 minutes
   Returning:   25 minutes
   Total:    75 minutes = 1.25 hours

   Average speed for the whole trip =

   (total distance) / (total time)

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3 years ago

Find the other endpoint of the line segment with the given endpoint and midpoint.

Marat540 [252]

Answer:

(-2,12)

Step-by-step explanation:

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2 years ago

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In order to solve the following system of equations by addition, which of the

Pavlova-9 [17]

Answer:

Multiply the top equation by -3 and the bottom equation by 2

Step-by-step explanation:

Given <u>system of equations</u>:

$\begin{cases}4x-2y=7\\3x-3y=15 \end{cases}$

To solve the given system of equations by addition, make one of the variables in both equations <u>sum to zero</u>. To do this, the chosen variable must have the <u>same coefficient</u>, but it should be <u>negative</u> in one equation and <u>positive</u> in the other, so that when the two equations are added together, the variable is <u>eliminated</u>.

<u>To eliminate the </u><u>variable y</u>:

Multiply the top equation by -3 to make the coefficient of the y variable 6:

$\implies -3(4x-2y=7) \implies -12x+6y=-21$

Multiply the bottom equation by 2 to make the coefficient of the y variable -6:

$\implies 2(3x-3y=15) \implies 6x-6y=30$

Add the two equations together to <u>eliminate y</u>:

$\begin{array}{l r r}& -12x+6y= &-21\\+ & 6x-6y= & 30\\\cline{1-3}& -6x\phantom{))))))} = & 9\end{array}$

<u>Solve</u> for x:

$\implies -6x=9$

$\implies x=-\dfrac{9}{6}=-\dfrac{3}{2}$

<u>Substitute</u> the found value of x into one of the equations and <u>solve for y</u>:

$\implies 3\left(-\dfrac{3}{2}\right)-3y=15$

$\implies -\dfrac{9}{2}-3y=15$

$\implies -3y=\dfrac{39}{2}$

$\implies y=-\dfrac{39}{2 \cdot 3}$

$\implies y=-\dfrac{13}{2}$

Learn more about systems of equations here:

brainly.com/question/27868564

brainly.com/question/27520807

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1 year ago

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Determine the slope of the following graph.

evablogger [386]

Answer:

2/1 or 2

Step-by-step explanation:

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2 years ago