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Sindrei [870]
3 years ago
6

Write an equation that represents the data in the table:

Mathematics
1 answer:
Nadya [2.5K]3 years ago
5 0
Y = x + 12 or x = y - 12
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PLEASE HELP
kotegsom [21]

Answer:

15$

Step-by-step explanation:

I'm guessing theres only one friend based on the singular "friend" but if there was more please tell me

so we can do 5-20 = 15 and that 15 is what her friend had.

5 0
3 years ago
Read 2 more answers
F(x)=x^2-3x+18 how many distinct real number zeros does f have?
vampirchik [111]

Answer:

None of the distinct real number zeros the function have.

Step-by-step explanation:

Considering the function

f(x)=x^2-3x+18

The zeroes of a function are those values that touches the x-axis. In order to find those values we must

Set  f(x) = 0 in order to find those values

0=x^2-3x+18

\mathrm{Switch\:sides}

x^2-3x+18=0

\mathrm{Solve\:with\:the\:quadratic\:formula}

\mathrm{For\:a\:quadratic\:equation\:of\:the\:form\:}ax^2+bx+c=0\mathrm{\:the\:solutions\:are\:}

x_{1,\:2}=\frac{-b\pm \sqrt{b^2-4ac}}{2a}

\mathrm{For\:}\quad a=1,\:b=-3,\:c=18:\quad x_{1,\:2}=\frac{-\left(-3\right)\pm \sqrt{\left(-3\right)^2-4\cdot \:1\cdot \:18}}{2\cdot \:1}

x=\frac{-\left(-3\right)+\sqrt{\left(-3\right)^2-4\cdot \:1\cdot \:18}}{2\cdot \:1}

x=\frac{3+\sqrt{\left(-3\right)^2-4\cdot \:1\cdot \:18}}{2\cdot \:1}

As

3+\sqrt{\left(-3\right)^2-4\cdot \:1\cdot \:18}=3+\sqrt{63}i

so

x=\frac{3+\sqrt{63}i}{2\cdot \:1}

x=\frac{3+3\sqrt{7}i}{2}

x=\frac{3}{2}+\frac{3\sqrt{7}}{2}i

Similarly,

x=\frac{-\left(-3\right)-\sqrt{\left(-3\right)^2-4\cdot \:1\cdot \:18}}{2\cdot \:1}:\quad \frac{3}{2}-i\frac{3\sqrt{7}}{2}

\mathrm{The\:solutions\:to\:the\:quadratic\:equation\:are:}

x=\frac{3}{2}+i\frac{3\sqrt{7}}{2},\:x=\frac{3}{2}-i\frac{3\sqrt{7}}{2}

BUT, NONE OF THEM ARE REAL NUMBER ZEROS.

Therefore, none of the distinct real number zeros the function have.

5 0
4 years ago
Change the subject of the equation v = u + at to a.
emmasim [6.3K]
<h3>Answer ↓</h3>

<h3>Calculations ↓</h3>

In order to make a the subject of this equation , we need to get a by itself .

The current equation is :

v = u + at

Subtract u on both sides :

v-u=at

Now, divide by t on both sides :

v-u/t=a

<h3>So the formula looks like ↓</h3>

\boxed{\\\begin{minipage}{3cm}Equation \\ a=$\displaystyle\frac{v-u}{t} $ \\ \end{minipage}}

hope helpful ~

8 0
3 years ago
I need help
BlackZzzverrR [31]

Answer:

Question 1)

Cristina is traveling 11 miles per hour and Kori is traveling 20 miles per hour.

Question 2)

Four hours.

Question 3)

Paige spent two hours biking and six hours walking.

Step-by-step explanation:

Question 1)

Let Cristina's speed be <em>x</em>.

Kori travels 9 miles per hour faster than Cristina. So, Kori's speed is (<em>x</em> + 9).

After six hours, Cristina would have traveled 6<em>x</em> miles and Kori would have traveled 6(<em>x</em> + 9) miles.

Since Kori traveled in the opposite direction, we can place a negative to represent this. So, after six hours, Kori is -6(<em>x</em> + 9) miles away from the restaurant while Cristina is 6<em>x</em> miles away from the restaurant.

Since the distance between them is 186 miles, the difference of the two expressions is 186. Hence:

(6x)-(-6(x+9))=186

Distribute:

6x-(-6x-54)=186

Distribute:

6x+6x+54=186

Simplify:

12x=132

Hence:

x=11

Cristina's speed is 11 miles per hour. Thus, Kori's speed is 20 miles per hour.

Question 2)

Let <em>h</em> represent the amount of time that has passed in hours.

Carrie left the restaurant traveling 12 miles per hour.

Four hours later, Leah left traveling in the same direction at 24 miles per hour.

After four hours, Carrie would have traveled 12(4) = 48 miles.

Carrie would still be traveling at 12 miles per hour. So, her distance from the restaurant is given by:

12h+48

Since Leah just left and is traveling at a rate of 24 miles per hour, her distance from the restaurant is given by:

24h

Leah will catch up when the two expressions are equivalent. Hence:

12h+48=24h

Solve for <em>h: </em>

<em />12h=48\Rightarrow h=4<em />

Leah will catch up with Carrie in four hours.

Question 3)

Let <em>x</em> represent the amount of hours spent biking and <em>y</em> represent the amount of hours spent walking.

The total trip to the mall took eight hours. Hence:

x+y=8

The mall is a total of 46 miles away. Since Paige bikes at a rate of 8 miles per hour and walks at a rate of five miles per hour:

8x+5y=46

Solve the system. We can use elimination. Multiply the first equation by -5:

-5x-5y=-40

We can add this to the second equation:

3x=6

Hence:

x=2

Using the first equation again:

(2)+y=8\Rightarrow y=6

So, Paige spent two hours biking and six hours walking.

4 0
3 years ago
Why is a capacity of 25 fluid ounces more than a capacity of 3 cups
Bumek [7]
Because the 25fluid ounces can be converted then divided so 3 cups will stay the same bro I'm in 6thgrade 
4 0
4 years ago
Read 2 more answers
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